Package org.codehaus.groovy.runtime

## Class ResourceGroovyMethods

- java.lang.Object
- - org.codehaus.groovy.runtime.DefaultGroovyMethodsSupport
  - - org.codehaus.groovy.runtime.ResourceGroovyMethods

-     public class ResourceGroovyMethods
      extends DefaultGroovyMethodsSupport

  This class defines new groovy methods for Readers, Writers, InputStreams and OutputStreams which appear on normal JDK classes inside the Groovy environment. Static methods are used with the first parameter being the destination class, i.e. `public static T eachLine(InputStream self, Closure c)` provides a `eachLine(Closure c)` method for `InputStream`.

  NOTE: While this class contains many 'public' static methods, it is primarily regarded as an internal class (its internal package name suggests this also). We value backwards compatibility of these methods when used within Groovy but value less backwards compatibility at the Java method call level. I.e. future versions of Groovy may remove or move a method call in this file but would normally aim to keep the method available from within Groovy.

- - ### Constructor Summary

    Constructors
    Constructor | Description
    --- | ---
    `ResourceGroovyMethods()` |

  - ### Method Summary

    All Methods Static Methods Concrete Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `static void` | `append​(File file, byte[] bytes)` | Append bytes to the end of a File.
    `static void` | `append​(File self, InputStream stream)` | Append binary data to the file.
    `static void` | `append​(File file, Reader reader)` | Append the text supplied by the Writer at the end of the File without writing a BOM.
    `static void` | `append​(File file, Reader reader, boolean writeBom)` | Append the text supplied by the Reader at the end of the File, using a specified encoding.
    `static void` | `append​(File file, Reader reader, String charset)` | Append the text supplied by the Reader at the end of the File without writing a BOM, using a specified encoding.
    `static void` | `append​(File file, Reader reader, String charset, boolean writeBom)` | Append the text supplied by the Reader at the end of the File, using a specified encoding.
    `static void` | `append​(File file, Writer writer)` | Append the text supplied by the Writer at the end of the File without writing a BOM.
    `static void` | `append​(File file, Writer writer, boolean writeBom)` | Append the text supplied by the Writer at the end of the File.
    `static void` | `append​(File file, Writer writer, String charset)` | Append the text supplied by the Writer at the end of the File without writing a BOM, using a specified encoding.
    `static void` | `append​(File file, Writer writer, String charset, boolean writeBom)` | Append the text supplied by the Writer at the end of the File, using a specified encoding.
    `static void` | `append​(File file, Object text)` | Append the text at the end of the File without writing a BOM.
    `static void` | `append​(File file, Object text, boolean writeBom)` | Append the text at the end of the File.
    `static void` | `append​(File file, Object text, String charset)` | Append the text at the end of the File without writing a BOM, using a specified encoding.
    `static void` | `append​(File file, Object text, String charset, boolean writeBom)` | Append the text at the end of the File, using a specified encoding.
    `static <T> T` | `asType​(File f, Class<T> c)` | Converts this File to a `Writable` or delegates to default `DefaultGroovyMethods.asType(java.lang.Object, java.lang.Class)`.
    `static File` | `asWritable​(File file)` | Converts this File to a `Writable`.
    `static File` | `asWritable​(File file, String encoding)` | Allows a file to return a Writable implementation that can output itself to a Writer stream.
    `static boolean` | `deleteDir​(File self)` | Deletes a directory with all contained files and subdirectories.
    `static long` | `directorySize​(File self)` | Calculates directory size as total size of all its files, recursively.
    `static void` | `eachByte​(File self, int bufferLen, Closure closure)` | Traverse through the bytes of this File, bufferLen bytes at a time.
    `static void` | `eachByte​(File self, Closure closure)` | Traverse through each byte of this File
    `static void` | `eachByte​(URL url, int bufferLen, Closure closure)` | Reads the InputStream from this URL, passing a byte[] and a number of bytes to the given closure.
    `static void` | `eachByte​(URL url, Closure closure)` | Reads the InputStream from this URL, passing each byte to the given closure.
    `static void` | `eachDir​(File self, Closure closure)` | Invokes the closure for each subdirectory in this directory, ignoring regular files.
    `static void` | `eachDirMatch​(File self, Object nameFilter, Closure closure)` | Invokes the closure for each subdirectory whose name (dir.name) matches the given nameFilter in the given directory - calling the `DefaultGroovyMethods.isCase(java.lang.Object, java.lang.Object)` method to determine if a match occurs.
    `static void` | `eachDirRecurse​(File self, Closure closure)` | Recursively processes each descendant subdirectory in this directory.
    `static void` | `eachFile​(File self, FileType fileType, Closure closure)` | Invokes the closure for each 'child' file in this 'parent' folder/directory.
    `static void` | `eachFile​(File self, Closure closure)` | Invokes the closure for each 'child' file in this 'parent' folder/directory.
    `static void` | `eachFileMatch​(File self, FileType fileType, Object nameFilter, Closure closure)` | Invokes the closure for each file whose name (file.name) matches the given nameFilter in the given directory - calling the `DefaultGroovyMethods.isCase(java.lang.Object, java.lang.Object)` method to determine if a match occurs.
    `static void` | `eachFileMatch​(File self, Object nameFilter, Closure closure)` | Invokes the closure for each file whose name (file.name) matches the given nameFilter in the given directory - calling the `DefaultGroovyMethods.isCase(java.lang.Object, java.lang.Object)` method to determine if a match occurs.
    `static void` | `eachFileRecurse​(File self, FileType fileType, Closure closure)` | Processes each descendant file in this directory and any sub-directories.
    `static void` | `eachFileRecurse​(File self, Closure closure)` | Processes each descendant file in this directory and any sub-directories.
    `static <T> T` | `eachLine​(File self, int firstLine, Closure<T> closure)` | Iterates through this file line by line.
    `static <T> T` | `eachLine​(File self, Closure<T> closure)` | Iterates through this file line by line.
    `static <T> T` | `eachLine​(File self, String charset, int firstLine, Closure<T> closure)` | Iterates through this file line by line.
    `static <T> T` | `eachLine​(File self, String charset, Closure<T> closure)` | Iterates through this file line by line.
    `static <T> T` | `eachLine​(URL url, int firstLine, Closure<T> closure)` | Iterates through the lines read from the URL's associated input stream passing each line to the given 1 or 2 arg closure.
    `static <T> T` | `eachLine​(URL url, Closure<T> closure)` | Iterates through the lines read from the URL's associated input stream passing each line to the given 1 or 2 arg closure.
    `static <T> T` | `eachLine​(URL url, String charset, int firstLine, Closure<T> closure)` | Iterates through the lines read from the URL's associated input stream passing each line to the given 1 or 2 arg closure.
    `static <T> T` | `eachLine​(URL url, String charset, Closure<T> closure)` | Iterates through the lines read from the URL's associated input stream passing each line to the given 1 or 2 arg closure.
    `static void` | `eachObject​(File self, Closure closure)` | Iterates through the given file object by object.
    `static Writable` | `filterLine​(File self, Closure closure)` | Filters the lines of a File and creates a Writable in return to stream the filtered lines.
    `static void` | `filterLine​(File self, Writer writer, Closure closure)` | Filter the lines from this File, and write them to the given writer based on the given closure predicate.
    `static void` | `filterLine​(File self, Writer writer, String charset, Closure closure)` | Filter the lines from this File, and write them to the given writer based on the given closure predicate.
    `static Writable` | `filterLine​(File self, String charset, Closure closure)` | Filters the lines of a File and creates a Writable in return to stream the filtered lines.
    `static Writable` | `filterLine​(URL self, Closure predicate)` | Filter lines from a URL using a closure predicate.
    `static void` | `filterLine​(URL self, Writer writer, Closure predicate)` | Uses a closure to filter lines from this URL and pass them to the given writer.
    `static void` | `filterLine​(URL self, Writer writer, String charset, Closure predicate)` | Uses a closure to filter lines from this URL and pass them to the given writer.
    `static Writable` | `filterLine​(URL self, String charset, Closure predicate)` | Filter lines from a URL using a closure predicate.
    `static byte[]` | `getBytes​(File file)` | Read the content of the File and returns it as a byte[].
    `static byte[]` | `getBytes​(URL url)` | Read the content of this URL and returns it as a byte[].
    `static byte[]` | `getBytes​(URL url, Map parameters)` | Read the content of this URL and returns it as a byte[].
    `static String` | `getText​(File file)` | Read the content of the File and returns it as a String.
    `static String` | `getText​(File file, String charset)` | Read the content of the File using the specified encoding and return it as a String.
    `static String` | `getText​(URL url)` | Read the content of this URL and returns it as a String.
    `static String` | `getText​(URL url, String charset)` | Read the data from this URL and return it as a String.
    `static String` | `getText​(URL url, Map parameters)` | Read the content of this URL and returns it as a String.
    `static String` | `getText​(URL url, Map parameters, String charset)` | Read the data from this URL and return it as a String.
    `static File` | `leftShift​(File file, byte[] bytes)` | Write bytes to a File.
    `static File` | `leftShift​(File file, InputStream data)` | Append binary data to the file.
    `static File` | `leftShift​(File file, Object text)` | Write the text to the File.
    `static DataInputStream` | `newDataInputStream​(File file)` | Create a data input stream for this file
    `static DataOutputStream` | `newDataOutputStream​(File file)` | Creates a new data output stream for this file.
    `static BufferedInputStream` | `newInputStream​(File file)` | Creates a buffered input stream for this file.
    `static BufferedInputStream` | `newInputStream​(URL url)` | Creates a buffered input stream for this URL.
    `static BufferedInputStream` | `newInputStream​(URL url, Map parameters)` | Creates a buffered input stream for this URL.
    `static ObjectInputStream` | `newObjectInputStream​(File file)` | Create an object input stream for this file.
    `static ObjectInputStream` | `newObjectInputStream​(File file, ClassLoader classLoader)` | Create an object input stream for this file using the given class loader.
    `static ObjectOutputStream` | `newObjectOutputStream​(File file)` | Create an object output stream for this file.
    `static BufferedOutputStream` | `newOutputStream​(File file)` | Create a buffered output stream for this file.
    `static PrintWriter` | `newPrintWriter​(File file)` | Create a new PrintWriter for this file.
    `static PrintWriter` | `newPrintWriter​(File file, String charset)` | Create a new PrintWriter for this file, using specified charset.
    `static BufferedReader` | `newReader​(File file)` | Create a buffered reader for this file.
    `static BufferedReader` | `newReader​(File file, String charset)` | Create a buffered reader for this file, using the specified charset as the encoding.
    `static BufferedReader` | `newReader​(URL url)` | Creates a buffered reader for this URL.
    `static BufferedReader` | `newReader​(URL url, String charset)` | Creates a buffered reader for this URL using the given encoding.
    `static BufferedReader` | `newReader​(URL url, Map parameters)` | Creates a buffered reader for this URL.
    `static BufferedReader` | `newReader​(URL url, Map parameters, String charset)` | Creates a buffered reader for this URL using the given encoding.
    `static BufferedWriter` | `newWriter​(File file)` | Create a buffered writer for this file.
    `static BufferedWriter` | `newWriter​(File file, boolean append)` | Creates a buffered writer for this file, optionally appending to the existing file content.
    `static BufferedWriter` | `newWriter​(File file, String charset)` | Creates a buffered writer for this file, writing data without writing a BOM, using a specified encoding.
    `static BufferedWriter` | `newWriter​(File file, String charset, boolean append)` | Helper method to create a buffered writer for a file without writing a BOM.
    `static BufferedWriter` | `newWriter​(File file, String charset, boolean append, boolean writeBom)` | Helper method to create a buffered writer for a file.
    `static byte[]` | `readBytes​(File file)` | Reads the content of the file into a byte array.
    `static List<String>` | `readLines​(File file)` | Reads the file into a list of Strings, with one item for each line.
    `static List<String>` | `readLines​(File file, String charset)` | Reads the file into a list of Strings, with one item for each line.
    `static List<String>` | `readLines​(URL self)` | Reads the URL contents into a list, with one element for each line.
    `static List<String>` | `readLines​(URL self, String charset)` | Reads the URL contents into a list, with one element for each line.
    `static String` | `relativePath​(File self, File to)` | Relative path to file.
    `static boolean` | `renameTo​(File self, String newPathName)` | Renames the file.
    `static void` | `setBytes​(File file, byte[] bytes)` | Write the bytes from the byte array to the File.
    `static void` | `setText​(File file, String text)` | Synonym for write(text) allowing file.text = 'foo'.
    `static void` | `setText​(File file, String text, String charset)` | Synonym for write(text, charset) allowing:
    `static long` | `size​(File self)` | Provide the standard Groovy `size()` method for `File`.
    `static <T> T` | `splitEachLine​(File self, String regex, Closure<T> closure)` | Iterates through this file line by line, splitting each line using the given regex separator.
    `static <T> T` | `splitEachLine​(File self, String regex, String charset, Closure<T> closure)` | Iterates through this file line by line, splitting each line using the given regex separator.
    `static <T> T` | `splitEachLine​(File self, Pattern pattern, Closure<T> closure)` | Iterates through this file line by line, splitting each line using the given separator Pattern.
    `static <T> T` | `splitEachLine​(File self, Pattern pattern, String charset, Closure<T> closure)` | Iterates through this file line by line, splitting each line using the given regex separator Pattern.
    `static <T> T` | `splitEachLine​(URL self, String regex, Closure<T> closure)` | Iterates through the input stream associated with this URL line by line, splitting each line using the given regex separator.
    `static <T> T` | `splitEachLine​(URL self, String regex, String charset, Closure<T> closure)` | Iterates through the input stream associated with this URL line by line, splitting each line using the given regex separator.
    `static <T> T` | `splitEachLine​(URL self, Pattern pattern, Closure<T> closure)` | Iterates through the input stream associated with this URL line by line, splitting each line using the given regex separator Pattern.
    `static <T> T` | `splitEachLine​(URL self, Pattern pattern, String charset, Closure<T> closure)` | Iterates through the input stream associated with this URL line by line, splitting each line using the given regex separator Pattern.
    `static URI` | `toURI​(CharSequence self)` | Transforms a CharSequence representing a URI into a URI object.
    `static URI` | `toURI​(String self)` | Transforms a String representing a URI into a URI object.
    `static URL` | `toURL​(CharSequence self)` | Transforms a CharSequence representing a URL into a URL object.
    `static URL` | `toURL​(String self)` | Transforms a String representing a URL into a URL object.
    `static void` | `traverse​(File self, Closure closure)` | Processes each descendant file in this directory and any sub-directories.
    `static void` | `traverse​(File self, Map<String,​?> options)` | Invokes the closure specified with key 'visit' in the options Map for each descendant file in this directory tree.
    `static void` | `traverse​(File self, Map<String,​?> options, Closure closure)` | Processes each descendant file in this directory and any sub-directories.
    `static <T> T` | `withDataInputStream​(File file, Closure<T> closure)` | Create a new DataInputStream for this file and passes it into the closure.
    `static <T> T` | `withDataOutputStream​(File file, Closure<T> closure)` | Create a new DataOutputStream for this file and passes it into the closure.
    `static Object` | `withInputStream​(File file, Closure closure)` | Create a new InputStream for this file and passes it into the closure.
    `static <T> T` | `withInputStream​(URL url, Closure<T> closure)` | Creates a new InputStream for this URL and passes it into the closure.
    `static <T> T` | `withObjectInputStream​(File file, Closure<T> closure)` | Create a new ObjectInputStream for this file and pass it to the closure.
    `static <T> T` | `withObjectInputStream​(File file, ClassLoader classLoader, Closure<T> closure)` | Create a new ObjectInputStream for this file associated with the given class loader and pass it to the closure.
    `static <T> T` | `withObjectOutputStream​(File file, Closure<T> closure)` | Create a new ObjectOutputStream for this file and then pass it to the closure.
    `static Object` | `withOutputStream​(File file, Closure closure)` | Creates a new OutputStream for this file and passes it into the closure.
    `static <T> T` | `withPrintWriter​(File file, Closure<T> closure)` | Create a new PrintWriter for this file which is then passed it into the given closure.
    `static <T> T` | `withPrintWriter​(File file, String charset, Closure<T> closure)` | Create a new PrintWriter with a specified charset for this file.
    `static <T> T` | `withReader​(File file, Closure<T> closure)` | Create a new BufferedReader for this file and then passes it into the closure, ensuring the reader is closed after the closure returns.
    `static <T> T` | `withReader​(File file, String charset, Closure<T> closure)` | Create a new BufferedReader for this file using the specified charset and then passes it into the closure, ensuring the reader is closed after the closure returns.
    `static <T> T` | `withReader​(URL url, Closure<T> closure)` | Helper method to create a new BufferedReader for a URL and then passes it to the closure.
    `static <T> T` | `withReader​(URL url, String charset, Closure<T> closure)` | Helper method to create a new Reader for a URL and then passes it to the closure.
    `static <T> T` | `withWriter​(File file, Closure<T> closure)` | Creates a new BufferedWriter for this file, passes it to the closure, and ensures the stream is flushed and closed after the closure returns.
    `static <T> T` | `withWriter​(File file, String charset, Closure<T> closure)` | Creates a new BufferedWriter for this file, passes it to the closure, and ensures the stream is flushed and closed after the closure returns.
    `static <T> T` | `withWriterAppend​(File file, Closure<T> closure)` | Create a new BufferedWriter for this file in append mode.
    `static <T> T` | `withWriterAppend​(File file, String charset, Closure<T> closure)` | Create a new BufferedWriter which will append to this file.
    `static void` | `write​(File file, String text)` | Write the text to the File without writing a BOM.
    `static void` | `write​(File file, String text, boolean writeBom)` | Write the text to the File.
    `static void` | `write​(File file, String text, String charset)` | Write the text to the File without writing a BOM, using the specified encoding.
    `static void` | `write​(File file, String text, String charset, boolean writeBom)` | Write the text to the File, using the specified encoding.

    - ### Methods inherited from class org.codehaus.groovy.runtime.DefaultGroovyMethodsSupport

      `cloneSimilarCollection, cloneSimilarMap, closeQuietly, closeWithWarning, createSimilarArray, createSimilarCollection, createSimilarCollection, createSimilarCollection, createSimilarList, createSimilarMap, createSimilarOrDefaultCollection, createSimilarQueue, createSimilarSet, normaliseIndex, sameType, subListBorders, subListBorders, writeUTF16BomIfRequired, writeUTF16BomIfRequired, writeUTF16BomIfRequired, writeUTF16BomIfRequired`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### ResourceGroovyMethods

          public ResourceGroovyMethods()

  - ### Method Detail

    - #### size

          public static long size​(File self)

      Provide the standard Groovy `size()` method for `File`.
      Parameters:
        `self` - a file object
      Returns:
        the file's size (length)
      Since:
        1.5.0

    - #### directorySize

          public static long directorySize​(File self)
                                    throws IOException,
                                           IllegalArgumentException

      Calculates directory size as total size of all its files, recursively.
      Parameters:
        `self` - a file object
      Returns:
        directory size (length)
      Throws:
        `IOException` - if File object specified does not exist
        `IllegalArgumentException` - if the provided File object does not represent a directory
      Since:
        2.1

    - #### newObjectOutputStream

          public static ObjectOutputStream newObjectOutputStream​(File file)
                                                          throws IOException

      Create an object output stream for this file.
      Parameters:
        `file` - a file
      Returns:
        an object output stream
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.5.0

    - #### withObjectOutputStream

          public static <T> T withObjectOutputStream​(File file,
                                                     Closure<T> closure)
                                              throws IOException

      Create a new ObjectOutputStream for this file and then pass it to the closure. This method ensures the stream is closed after the closure returns.
      Parameters:
        `file` - a File
        `closure` - a closure
      Returns:
        the value returned by the closure
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.5.0
      See Also:
        `IOGroovyMethods.withStream(java.io.OutputStream, groovy.lang.Closure)`

    - #### newObjectInputStream

          public static ObjectInputStream newObjectInputStream​(File file)
                                                        throws IOException

      Create an object input stream for this file.
      Parameters:
        `file` - a file
      Returns:
        an object input stream
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.5.0

    - #### newObjectInputStream

          public static ObjectInputStream newObjectInputStream​(File file,
                                                               ClassLoader classLoader)
                                                        throws IOException

      Create an object input stream for this file using the given class loader.
      Parameters:
        `file` - a file
        `classLoader` - the class loader to use when loading the class
      Returns:
        an object input stream
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.5.0

    - #### eachObject

          public static void eachObject​(File self,
                                        Closure closure)
                                 throws IOException,
                                        ClassNotFoundException

      Iterates through the given file object by object.
      Parameters:
        `self` - a File
        `closure` - a closure
      Throws:
        `IOException` - if an IOException occurs.
        `ClassNotFoundException` - if the class is not found.
      Since:
        1.0
      See Also:
        `IOGroovyMethods.eachObject(java.io.ObjectInputStream, groovy.lang.Closure)`

    - #### withObjectInputStream

          public static <T> T withObjectInputStream​(File file,
                                                    Closure<T> closure)
                                             throws IOException

      Create a new ObjectInputStream for this file and pass it to the closure. This method ensures the stream is closed after the closure returns.
      Parameters:
        `file` - a File
        `closure` - a closure
      Returns:
        the value returned by the closure
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.5.2
      See Also:
        `IOGroovyMethods.withStream(java.io.InputStream, groovy.lang.Closure)`

    - #### withObjectInputStream

          public static <T> T withObjectInputStream​(File file,
                                                    ClassLoader classLoader,
                                                    Closure<T> closure)
                                             throws IOException

      Create a new ObjectInputStream for this file associated with the given class loader and pass it to the closure. This method ensures the stream is closed after the closure returns.
      Parameters:
        `file` - a File
        `classLoader` - the class loader to use when loading the class
        `closure` - a closure
      Returns:
        the value returned by the closure
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.5.2
      See Also:
        `IOGroovyMethods.withStream(java.io.InputStream, groovy.lang.Closure)`

    - #### eachLine

          public static <T> T eachLine​(File self,
                                       Closure<T> closure)
                                throws IOException

      Iterates through this file line by line. Each line is passed to the given 1 or 2 arg closure. The file is read using a reader which is closed before this method returns.
      Parameters:
        `self` - a File
        `closure` - a closure (arg 1 is line, optional arg 2 is line number starting at line 1)
      Returns:
        the last value returned by the closure
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.5.5
      See Also:
        `eachLine(java.io.File, int, groovy.lang.Closure)`

    - #### eachLine

          public static <T> T eachLine​(File self,
                                       String charset,
                                       Closure<T> closure)
                                throws IOException

      Iterates through this file line by line. Each line is passed to the given 1 or 2 arg closure. The file is read using a reader which is closed before this method returns.
      Parameters:
        `self` - a File
        `charset` - opens the file with a specified charset
        `closure` - a closure (arg 1 is line, optional arg 2 is line number starting at line 1)
      Returns:
        the last value returned by the closure
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.6.8
      See Also:
        `eachLine(java.io.File, java.lang.String, int, groovy.lang.Closure)`

    - #### eachLine

          public static <T> T eachLine​(File self,
                                       int firstLine,
                                       Closure<T> closure)
                                throws IOException

      Iterates through this file line by line. Each line is passed to the given 1 or 2 arg closure. The file is read using a reader which is closed before this method returns.
      Parameters:
        `self` - a File
        `firstLine` - the line number value used for the first line (default is 1, set to 0 to start counting from 0)
        `closure` - a closure (arg 1 is line, optional arg 2 is line number)
      Returns:
        the last value returned by the closure
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.5.7
      See Also:
        `IOGroovyMethods.eachLine(java.io.Reader, int, groovy.lang.Closure)`

    - #### eachLine

          public static <T> T eachLine​(File self,
                                       String charset,
                                       int firstLine,
                                       Closure<T> closure)
                                throws IOException

      Iterates through this file line by line. Each line is passed to the given 1 or 2 arg closure. The file is read using a reader which is closed before this method returns.
      Parameters:
        `self` - a File
        `charset` - opens the file with a specified charset
        `firstLine` - the line number value used for the first line (default is 1, set to 0 to start counting from 0)
        `closure` - a closure (arg 1 is line, optional arg 2 is line number)
      Returns:
        the last value returned by the closure
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.6.8
      See Also:
        `IOGroovyMethods.eachLine(java.io.Reader, int, groovy.lang.Closure)`

    - #### eachLine

          public static <T> T eachLine​(URL url,
                                       Closure<T> closure)
                                throws IOException

      Iterates through the lines read from the URL's associated input stream passing each line to the given 1 or 2 arg closure. The stream is closed before this method returns.
      Parameters:
        `url` - a URL to open and read
        `closure` - a closure to apply on each line (arg 1 is line, optional arg 2 is line number starting at line 1)
      Returns:
        the last value returned by the closure
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.5.6
      See Also:
        `eachLine(java.net.URL, int, groovy.lang.Closure)`

    - #### eachLine

          public static <T> T eachLine​(URL url,
                                       int firstLine,
                                       Closure<T> closure)
                                throws IOException

      Iterates through the lines read from the URL's associated input stream passing each line to the given 1 or 2 arg closure. The stream is closed before this method returns.
      Parameters:
        `url` - a URL to open and read
        `firstLine` - the line number value used for the first line (default is 1, set to 0 to start counting from 0)
        `closure` - a closure to apply on each line (arg 1 is line, optional arg 2 is line number)
      Returns:
        the last value returned by the closure
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.5.7
      See Also:
        `IOGroovyMethods.eachLine(java.io.InputStream, int, groovy.lang.Closure)`

    - #### eachLine

          public static <T> T eachLine​(URL url,
                                       String charset,
                                       Closure<T> closure)
                                throws IOException

      Iterates through the lines read from the URL's associated input stream passing each line to the given 1 or 2 arg closure. The stream is closed before this method returns.
      Parameters:
        `url` - a URL to open and read
        `charset` - opens the stream with a specified charset
        `closure` - a closure to apply on each line (arg 1 is line, optional arg 2 is line number starting at line 1)
      Returns:
        the last value returned by the closure
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.5.6
      See Also:
        `eachLine(java.net.URL, java.lang.String, int, groovy.lang.Closure)`

    - #### eachLine

          public static <T> T eachLine​(URL url,
                                       String charset,
                                       int firstLine,
                                       Closure<T> closure)
                                throws IOException

      Iterates through the lines read from the URL's associated input stream passing each line to the given 1 or 2 arg closure. The stream is closed before this method returns.
      Parameters:
        `url` - a URL to open and read
        `charset` - opens the stream with a specified charset
        `firstLine` - the line number value used for the first line (default is 1, set to 0 to start counting from 0)
        `closure` - a closure to apply on each line (arg 1 is line, optional arg 2 is line number)
      Returns:
        the last value returned by the closure
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.5.7
      See Also:
        `IOGroovyMethods.eachLine(java.io.Reader, int, groovy.lang.Closure)`

    - #### splitEachLine

          public static <T> T splitEachLine​(File self,
                                            String regex,
                                            Closure<T> closure)
                                     throws IOException

      Iterates through this file line by line, splitting each line using the given regex separator. For each line, the given closure is called with a single parameter being the list of strings computed by splitting the line around matches of the given regular expression. Finally the resources used for processing the file are closed.
      Parameters:
        `self` - a File
        `regex` - the delimiting regular expression
        `closure` - a closure
      Returns:
        the last value returned by the closure
      Throws:
        `IOException` - if an IOException occurs.
        `PatternSyntaxException` - if the regular expression's syntax is invalid
      Since:
        1.5.5
      See Also:
        `IOGroovyMethods.splitEachLine(java.io.Reader, java.lang.String, groovy.lang.Closure)`

    - #### splitEachLine

          public static <T> T splitEachLine​(File self,
                                            Pattern pattern,
                                            Closure<T> closure)
                                     throws IOException

      Iterates through this file line by line, splitting each line using the given separator Pattern. For each line, the given closure is called with a single parameter being the list of strings computed by splitting the line around matches of the given regular expression Pattern. Finally the resources used for processing the file are closed.
      Parameters:
        `self` - a File
        `pattern` - the regular expression Pattern for the delimiter
        `closure` - a closure
      Returns:
        the last value returned by the closure
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.6.8
      See Also:
        `IOGroovyMethods.splitEachLine(java.io.Reader, java.util.regex.Pattern, groovy.lang.Closure)`

    - #### splitEachLine

          public static <T> T splitEachLine​(File self,
                                            String regex,
                                            String charset,
                                            Closure<T> closure)
                                     throws IOException

      Iterates through this file line by line, splitting each line using the given regex separator. For each line, the given closure is called with a single parameter being the list of strings computed by splitting the line around matches of the given regular expression. Finally the resources used for processing the file are closed.
      Parameters:
        `self` - a File
        `regex` - the delimiting regular expression
        `charset` - opens the file with a specified charset
        `closure` - a closure
      Returns:
        the last value returned by the closure
      Throws:
        `IOException` - if an IOException occurs.
        `PatternSyntaxException` - if the regular expression's syntax is invalid
      Since:
        1.6.8
      See Also:
        `IOGroovyMethods.splitEachLine(java.io.Reader, java.lang.String, groovy.lang.Closure)`

    - #### splitEachLine

          public static <T> T splitEachLine​(File self,
                                            Pattern pattern,
                                            String charset,
                                            Closure<T> closure)
                                     throws IOException

      Iterates through this file line by line, splitting each line using the given regex separator Pattern. For each line, the given closure is called with a single parameter being the list of strings computed by splitting the line around matches of the given regular expression. Finally the resources used for processing the file are closed.
      Parameters:
        `self` - a File
        `pattern` - the regular expression Pattern for the delimiter
        `charset` - opens the file with a specified charset
        `closure` - a closure
      Returns:
        the last value returned by the closure
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.6.8
      See Also:
        `IOGroovyMethods.splitEachLine(java.io.Reader, java.util.regex.Pattern, groovy.lang.Closure)`

    - #### splitEachLine

          public static <T> T splitEachLine​(URL self,
                                            String regex,
                                            Closure<T> closure)
                                     throws IOException

      Iterates through the input stream associated with this URL line by line, splitting each line using the given regex separator. For each line, the given closure is called with a single parameter being the list of strings computed by splitting the line around matches of the given regular expression. Finally the resources used for processing the URL are closed.
      Parameters:
        `self` - a URL to open and read
        `regex` - the delimiting regular expression
        `closure` - a closure
      Returns:
        the last value returned by the closure
      Throws:
        `IOException` - if an IOException occurs.
        `PatternSyntaxException` - if the regular expression's syntax is invalid
      Since:
        1.6.8
      See Also:
        `IOGroovyMethods.splitEachLine(java.io.Reader, java.lang.String, groovy.lang.Closure)`

    - #### splitEachLine

          public static <T> T splitEachLine​(URL self,
                                            Pattern pattern,
                                            Closure<T> closure)
                                     throws IOException

      Iterates through the input stream associated with this URL line by line, splitting each line using the given regex separator Pattern. For each line, the given closure is called with a single parameter being the list of strings computed by splitting the line around matches of the given regular expression. Finally the resources used for processing the URL are closed.
      Parameters:
        `self` - a URL to open and read
        `pattern` - the regular expression Pattern for the delimiter
        `closure` - a closure
      Returns:
        the last value returned by the closure
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.6.8
      See Also:
        `IOGroovyMethods.splitEachLine(java.io.Reader, java.util.regex.Pattern, groovy.lang.Closure)`

    - #### splitEachLine

          public static <T> T splitEachLine​(URL self,
                                            String regex,
                                            String charset,
                                            Closure<T> closure)
                                     throws IOException

      Iterates through the input stream associated with this URL line by line, splitting each line using the given regex separator. For each line, the given closure is called with a single parameter being the list of strings computed by splitting the line around matches of the given regular expression. Finally the resources used for processing the URL are closed.
      Parameters:
        `self` - a URL to open and read
        `regex` - the delimiting regular expression
        `charset` - opens the file with a specified charset
        `closure` - a closure
      Returns:
        the last value returned by the closure
      Throws:
        `IOException` - if an IOException occurs.
        `PatternSyntaxException` - if the regular expression's syntax is invalid
      Since:
        1.6.8
      See Also:
        `IOGroovyMethods.splitEachLine(java.io.Reader, java.lang.String, groovy.lang.Closure)`

    - #### splitEachLine

          public static <T> T splitEachLine​(URL self,
                                            Pattern pattern,
                                            String charset,
                                            Closure<T> closure)
                                     throws IOException

      Iterates through the input stream associated with this URL line by line, splitting each line using the given regex separator Pattern. For each line, the given closure is called with a single parameter being the list of strings computed by splitting the line around matches of the given regular expression. Finally the resources used for processing the URL are closed.
      Parameters:
        `self` - a URL to open and read
        `pattern` - the regular expression Pattern for the delimiter
        `charset` - opens the file with a specified charset
        `closure` - a closure
      Returns:
        the last value returned by the closure
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.6.8
      See Also:
        `IOGroovyMethods.splitEachLine(java.io.Reader, java.util.regex.Pattern, groovy.lang.Closure)`

    - #### readLines

          public static List<String> readLines​(File file)
                                        throws IOException

      Reads the file into a list of Strings, with one item for each line.
      Parameters:
        `file` - a File
      Returns:
        a List of lines
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.0
      See Also:
        `IOGroovyMethods.readLines(java.io.Reader)`

    - #### readLines

          public static List<String> readLines​(File file,
                                               String charset)
                                        throws IOException

      Reads the file into a list of Strings, with one item for each line.
      Parameters:
        `file` - a File
        `charset` - opens the file with a specified charset
      Returns:
        a List of lines
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.6.8
      See Also:
        `IOGroovyMethods.readLines(java.io.Reader)`

    - #### readLines

          public static List<String> readLines​(URL self)
                                        throws IOException

      Reads the URL contents into a list, with one element for each line.
      Parameters:
        `self` - a URL
      Returns:
        a List of lines
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.6.8
      See Also:
        `IOGroovyMethods.readLines(java.io.Reader)`

    - #### readLines

          public static List<String> readLines​(URL self,
                                               String charset)
                                        throws IOException

      Reads the URL contents into a list, with one element for each line.
      Parameters:
        `self` - a URL
        `charset` - opens the URL with a specified charset
      Returns:
        a List of lines
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.6.8
      See Also:
        `IOGroovyMethods.readLines(java.io.Reader)`

    - #### getText

          public static String getText​(File file,
                                       String charset)
                                throws IOException

      Read the content of the File using the specified encoding and return it as a String.
      Parameters:
        `file` - the file whose content we want to read
        `charset` - the charset used to read the content of the file
      Returns:
        a String containing the content of the file
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.0

    - #### getText

          public static String getText​(File file)
                                throws IOException

      Read the content of the File and returns it as a String.
      Parameters:
        `file` - the file whose content we want to read
      Returns:
        a String containing the content of the file
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.0

    - #### getText

          public static String getText​(URL url)
                                throws IOException

      Read the content of this URL and returns it as a String.
      Parameters:
        `url` - URL to read content from
      Returns:
        the text from that URL
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.0

    - #### getText

          public static String getText​(URL url,
                                       Map parameters)
                                throws IOException

      Read the content of this URL and returns it as a String. The default connection parameters can be modified by adding keys to the parameters map:
      - connectTimeout : the connection timeout
      - readTimeout : the read timeout
      - useCaches : set the use cache property for the URL connection
      - allowUserInteraction : set the user interaction flag for the URL connection
      - requestProperties : a map of properties to be passed to the URL connection
      Parameters:
        `url` - URL to read content from
        `parameters` - connection parameters
      Returns:
        the text from that URL
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.8.1

    - #### getText

          public static String getText​(URL url,
                                       String charset)
                                throws IOException

      Read the data from this URL and return it as a String. The connection stream is closed before this method returns.
      Parameters:
        `url` - URL to read content from
        `charset` - opens the stream with a specified charset
      Returns:
        the text from that URL
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.0
      See Also:
        `URLConnection.getInputStream()`

    - #### getText

          public static String getText​(URL url,
                                       Map parameters,
                                       String charset)
                                throws IOException

      Read the data from this URL and return it as a String. The connection stream is closed before this method returns.
      Parameters:
        `url` - URL to read content from
        `parameters` - connection parameters
        `charset` - opens the stream with a specified charset
      Returns:
        the text from that URL
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.8.1
      See Also:
        `URLConnection.getInputStream()`

    - #### getBytes

          public static byte[] getBytes​(File file)
                                 throws IOException

      Read the content of the File and returns it as a byte[].
      Parameters:
        `file` - the file whose content we want to read
      Returns:
        a String containing the content of the file
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.7.1

    - #### getBytes

          public static byte[] getBytes​(URL url)
                                 throws IOException

      Read the content of this URL and returns it as a byte[].
      Parameters:
        `url` - URL to read content from
      Returns:
        the byte[] from that URL
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.7.1

    - #### getBytes

          public static byte[] getBytes​(URL url,
                                        Map parameters)
                                 throws IOException

      Read the content of this URL and returns it as a byte[]. The default connection parameters can be modified by adding keys to the parameters map:
      - connectTimeout : the connection timeout
      - readTimeout : the read timeout
      - useCaches : set the use cache property for the URL connection
      - allowUserInteraction : set the user interaction flag for the URL connection
      - requestProperties : a map of properties to be passed to the URL connection
      Parameters:
        `url` - URL to read content from
        `parameters` - connection parameters
      Returns:
        the byte[] from that URL
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        2.4.4

    - #### setBytes

          public static void setBytes​(File file,
                                      byte[] bytes)
                               throws IOException

      Write the bytes from the byte array to the File.
      Parameters:
        `file` - the file to write to
        `bytes` - the byte[] to write to the file
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.7.1

    - #### write

          public static void write​(File file,
                                   String text)
                            throws IOException

      Write the text to the File without writing a BOM.
      Parameters:
        `file` - a File
        `text` - the text to write to the File
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.0

    - #### write

          public static void write​(File file,
                                   String text,
                                   boolean writeBom)
                            throws IOException

      Write the text to the File. If the default charset is "UTF-16BE" or "UTF-16LE" (or an equivalent alias) and `writeBom` is `true`, the requisite byte order mark is written to the file before the text.
      Parameters:
        `file` - a File
        `text` - the text to write to the File
        `writeBom` - whether to write a BOM
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        2.5.0

    - #### setText

          public static void setText​(File file,
                                     String text)
                              throws IOException

      Synonym for write(text) allowing file.text = 'foo'.
      Parameters:
        `file` - a File
        `text` - the text to write to the File
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.5.1
      See Also:
        `write(java.io.File, java.lang.String)`

    - #### setText

          public static void setText​(File file,
                                     String text,
                                     String charset)
                              throws IOException

      Synonym for write(text, charset) allowing:

           myFile.setText('some text', charset)

      or with some help from `ExpandoMetaClass`, you could do something like:

           myFile.metaClass.setText = { String s -> delegate.setText(s, 'UTF-8') }
           myfile.text = 'some text'

      Parameters:
        `file` - A File
        `charset` - The charset used when writing to the file
        `text` - The text to write to the File
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.7.3
      See Also:
        `write(java.io.File, java.lang.String, java.lang.String)`

    - #### leftShift

          public static File leftShift​(File file,
                                       Object text)
                                throws IOException

      Write the text to the File.
      Parameters:
        `file` - a File
        `text` - the text to write to the File
      Returns:
        the original file
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.0

    - #### leftShift

          public static File leftShift​(File file,
                                       byte[] bytes)
                                throws IOException

      Write bytes to a File.
      Parameters:
        `file` - a File
        `bytes` - the byte array to append to the end of the File
      Returns:
        the original file
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.5.0

    - #### leftShift

          public static File leftShift​(File file,
                                       InputStream data)
                                throws IOException

      Append binary data to the file. See `append(java.io.File, java.io.InputStream)`
      Parameters:
        `file` - a File
        `data` - an InputStream of data to write to the file
      Returns:
        the file
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.5.0

    - #### write

          public static void write​(File file,
                                   String text,
                                   String charset)
                            throws IOException

      Write the text to the File without writing a BOM, using the specified encoding.
      Parameters:
        `file` - a File
        `text` - the text to write to the File
        `charset` - the charset used
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.0

    - #### write

          public static void write​(File file,
                                   String text,
                                   String charset,
                                   boolean writeBom)
                            throws IOException

      Write the text to the File, using the specified encoding. If the given charset is "UTF-16BE" or "UTF-16LE" (or an equivalent alias) and `writeBom` is `true`, the requisite byte order mark is written to the file before the text.
      Parameters:
        `file` - a File
        `text` - the text to write to the File
        `charset` - the charset used
        `writeBom` - whether to write a BOM
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        2.5.0

    - #### append

          public static void append​(File file,
                                    Object text)
                             throws IOException

      Append the text at the end of the File without writing a BOM.
      Parameters:
        `file` - a File
        `text` - the text to append at the end of the File
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.0

    - #### append

          public static void append​(File file,
                                    Object text,
                                    boolean writeBom)
                             throws IOException

      Append the text at the end of the File. If the default charset is "UTF-16BE" or "UTF-16LE" (or an equivalent alias) and `writeBom` is `true`, the requisite byte order mark is written to the file before the text.
      Parameters:
        `file` - a File
        `text` - the text to append at the end of the File
        `writeBom` - whether to write a BOM
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        2.5.0

    - #### append

          public static void append​(File file,
                                    Reader reader)
                             throws IOException

      Append the text supplied by the Writer at the end of the File without writing a BOM.
      Parameters:
        `file` - a File
        `reader` - the Reader supplying the text to append at the end of the File
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        2.3

    - #### append

          public static void append​(File file,
                                    Writer writer)
                             throws IOException

      Append the text supplied by the Writer at the end of the File without writing a BOM.
      Parameters:
        `file` - a File
        `writer` - the Writer supplying the text to append at the end of the File
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        2.3

    - #### append

          public static void append​(File file,
                                    Writer writer,
                                    boolean writeBom)
                             throws IOException

      Append the text supplied by the Writer at the end of the File. If the default charset is "UTF-16BE" or "UTF-16LE" (or an equivalent alias) and `writeBom` is `true`, the requisite byte order mark is written to the file before the text.
      Parameters:
        `file` - a File
        `writer` - the Writer supplying the text to append at the end of the File
        `writeBom` - whether to write a BOM
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        2.5.0

    - #### append

          public static void append​(File file,
                                    byte[] bytes)
                             throws IOException

      Append bytes to the end of a File. It will not be interpreted as text.
      Parameters:
        `file` - a File
        `bytes` - the byte array to append to the end of the File
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.5.1

    - #### append

          public static void append​(File self,
                                    InputStream stream)
                             throws IOException

      Append binary data to the file. It will not be interpreted as text.
      Parameters:
        `self` - a File
        `stream` - stream to read data from.
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.5.0

    - #### append

          public static void append​(File file,
                                    Object text,
                                    String charset)
                             throws IOException

      Append the text at the end of the File without writing a BOM, using a specified encoding.
      Parameters:
        `file` - a File
        `text` - the text to append at the end of the File
        `charset` - the charset used
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.0

    - #### append

          public static void append​(File file,
                                    Object text,
                                    String charset,
                                    boolean writeBom)
                             throws IOException

      Append the text at the end of the File, using a specified encoding. If the given charset is "UTF-16BE" or "UTF-16LE" (or an equivalent alias), `writeBom` is `true`, and the file doesn't already exist, the requisite byte order mark is written to the file before the text is appended.
      Parameters:
        `file` - a File
        `text` - the text to append at the end of the File
        `charset` - the charset used
        `writeBom` - whether to write a BOM
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        2.5.0

    - #### append

          public static void append​(File file,
                                    Writer writer,
                                    String charset)
                             throws IOException

      Append the text supplied by the Writer at the end of the File without writing a BOM, using a specified encoding.
      Parameters:
        `file` - a File
        `writer` - the Writer supplying the text to append at the end of the File
        `charset` - the charset used
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        2.3

    - #### append

          public static void append​(File file,
                                    Writer writer,
                                    String charset,
                                    boolean writeBom)
                             throws IOException

      Append the text supplied by the Writer at the end of the File, using a specified encoding. If the given charset is "UTF-16BE" or "UTF-16LE" (or an equivalent alias), `writeBom` is `true`, and the file doesn't already exist, the requisite byte order mark is written to the file before the text is appended.
      Parameters:
        `file` - a File
        `writer` - the Writer supplying the text to append at the end of the File
        `charset` - the charset used
        `writeBom` - whether to write a BOM
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        2.5.0

    - #### append

          public static void append​(File file,
                                    Reader reader,
                                    boolean writeBom)
                             throws IOException

      Append the text supplied by the Reader at the end of the File, using a specified encoding. If the given charset is "UTF-16BE" or "UTF-16LE" (or an equivalent alias), `writeBom` is `true`, and the file doesn't already exist, the requisite byte order mark is written to the file before the text is appended.
      Parameters:
        `file` - a File
        `reader` - the Reader supplying the text to append at the end of the File
        `writeBom` - whether to write a BOM
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        2.5.0

    - #### append

          public static void append​(File file,
                                    Reader reader,
                                    String charset)
                             throws IOException

      Append the text supplied by the Reader at the end of the File without writing a BOM, using a specified encoding.
      Parameters:
        `file` - a File
        `reader` - the Reader supplying the text to append at the end of the File
        `charset` - the charset used
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        2.3

    - #### append

          public static void append​(File file,
                                    Reader reader,
                                    String charset,
                                    boolean writeBom)
                             throws IOException

      Append the text supplied by the Reader at the end of the File, using a specified encoding. If the given charset is "UTF-16BE" or "UTF-16LE" (or an equivalent alias), `writeBom` is `true`, and the file doesn't already exist, the requisite byte order mark is written to the file before the text is appended.
      Parameters:
        `file` - a File
        `reader` - the Reader supplying the text to append at the end of the File
        `charset` - the charset used
        `writeBom` - whether to write a BOM
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        2.5.0

    - #### eachFile

          public static void eachFile​(File self,
                                      FileType fileType,
                                      Closure closure)
                               throws FileNotFoundException,
                                      IllegalArgumentException

      Invokes the closure for each 'child' file in this 'parent' folder/directory. Both regular files and subfolders/subdirectories can be processed depending on the fileType enum value.
      Parameters:
        `self` - a File (that happens to be a folder/directory)
        `fileType` - if normal files or directories or both should be processed
        `closure` - the closure to invoke
      Throws:
        `FileNotFoundException` - if the given directory does not exist
        `IllegalArgumentException` - if the provided File object does not represent a directory
      Since:
        1.7.1

    - #### eachFile

          public static void eachFile​(File self,
                                      Closure closure)
                               throws FileNotFoundException,
                                      IllegalArgumentException

      Invokes the closure for each 'child' file in this 'parent' folder/directory. Both regular files and subfolders/subdirectories are processed.
      Parameters:
        `self` - a File (that happens to be a folder/directory)
        `closure` - a closure (the parameter passed is the 'child' file)
      Throws:
        `FileNotFoundException` - if the given directory does not exist
        `IllegalArgumentException` - if the provided File object does not represent a directory
      Since:
        1.5.0
      See Also:
        `File.listFiles()`, `eachFile(java.io.File, groovy.io.FileType, groovy.lang.Closure)`

    - #### eachDir

          public static void eachDir​(File self,
                                     Closure closure)
                              throws FileNotFoundException,
                                     IllegalArgumentException

      Invokes the closure for each subdirectory in this directory, ignoring regular files.
      Parameters:
        `self` - a File (that happens to be a folder/directory)
        `closure` - a closure (the parameter passed is the subdirectory file)
      Throws:
        `FileNotFoundException` - if the given directory does not exist
        `IllegalArgumentException` - if the provided File object does not represent a directory
      Since:
        1.0
      See Also:
        `File.listFiles()`, `eachFile(java.io.File, groovy.io.FileType, groovy.lang.Closure)`

    - #### eachFileRecurse

          public static void eachFileRecurse​(File self,
                                             FileType fileType,
                                             Closure closure)
                                      throws FileNotFoundException,
                                             IllegalArgumentException

      Processes each descendant file in this directory and any sub-directories. Processing consists of potentially calling `closure` passing it the current file (which may be a normal file or subdirectory) and then if a subdirectory was encountered, recursively processing the subdirectory. Whether the closure is called is determined by whether the file was a normal file or subdirectory and the value of fileType.
      Parameters:
        `self` - a File (that happens to be a folder/directory)
        `fileType` - if normal files or directories or both should be processed
        `closure` - the closure to invoke on each file
      Throws:
        `FileNotFoundException` - if the given directory does not exist
        `IllegalArgumentException` - if the provided File object does not represent a directory
      Since:
        1.7.1

    - #### traverse

          public static void traverse​(File self,
                                      Map<String,​?> options,
                                      Closure closure)
                               throws FileNotFoundException,
                                      IllegalArgumentException

      Processes each descendant file in this directory and any sub-directories. Processing consists of potentially calling `closure` passing it the current file (which may be a normal file or subdirectory) and then if a subdirectory was encountered, recursively processing the subdirectory.

      The traversal can be adapted by providing various options in the `options` Map according to the following keys:

      type
        A `FileType` enum to determine if normal files or directories or both are processed
      preDir
        A `Closure` run before each directory is processed and optionally returning a `FileVisitResult` value which can be used to control subsequent processing.
      preRoot
        A boolean indicating that the 'preDir' closure should be applied at the root level
      postDir
        A `Closure` run after each directory is processed and optionally returning a `FileVisitResult` value which can be used to control subsequent processing. Particularly useful when strict depth-first traversal is required.
      postRoot
        A boolean indicating that the 'postDir' closure should be applied at the root level
      visitRoot
        A boolean indicating that the given closure should be applied for the root dir (not applicable if the 'type' is set to `FileType.FILES`)
      maxDepth
        The maximum number of directory levels when recursing (default is -1 which means infinite, set to 0 for no recursion)
      filter
        A filter to perform on traversed files/directories (using the `DefaultGroovyMethods.isCase(java.lang.Object, java.lang.Object)` method). If set, only files/dirs which match are candidates for visiting.
      nameFilter
        A filter to perform on the name of traversed files/directories (using the `DefaultGroovyMethods.isCase(java.lang.Object, java.lang.Object)` method). If set, only files/dirs which match are candidates for visiting. (Must not be set if 'filter' is set)
      excludeFilter
        A filter to perform on traversed files/directories (using the `DefaultGroovyMethods.isCase(java.lang.Object, java.lang.Object)` method). If set, any candidates which match won't be visited.
      excludeNameFilter
        A filter to perform on the names of traversed files/directories (using the `DefaultGroovyMethods.isCase(java.lang.Object, java.lang.Object)` method). If set, any candidates which match won't be visited. (Must not be set if 'excludeFilter' is set)
      sort
        A `Closure` which if set causes the files and subdirectories for each directory to be processed in sorted order. Note that even when processing only files, the order of visited subdirectories will be affected by this parameter.
      This example prints out file counts and size aggregates for groovy source files within a directory tree:

           def totalSize = 0
           def count = 0
           def sortByTypeThenName = { a, b ->
               a.isFile() != b.isFile() ? a.isFile() <=> b.isFile() : a.name <=> b.name
           }
           rootDir.traverse(
                   type         : FILES,
                   nameFilter   : ~/.*\.groovy/,
                   preDir       : { if (it.name == '.svn') return SKIP_SUBTREE },
                   postDir      : { println "Found $count files in $it.name totalling $totalSize bytes"
                                   totalSize = 0; count = 0 },
                   postRoot     : true
                   sort         : sortByTypeThenName
           ) {it -> totalSize += it.size(); count++ }

      Parameters:
        `self` - a File (that happens to be a folder/directory)
        `options` - a Map of options to alter the traversal behavior
        `closure` - the Closure to invoke on each file/directory and optionally returning a `FileVisitResult` value which can be used to control subsequent processing
      Throws:
        `FileNotFoundException` - if the given directory does not exist
        `IllegalArgumentException` - if the provided File object does not represent a directory or illegal filter combinations are supplied
      Since:
        1.7.1
      See Also:
        `DefaultGroovyMethods.sort(Iterable, groovy.lang.Closure)`, `FileVisitResult`, `FileType`

    - #### traverse

          public static void traverse​(File self,
                                      Closure closure)
                               throws FileNotFoundException,
                                      IllegalArgumentException

      Processes each descendant file in this directory and any sub-directories. Convenience method for `traverse(java.io.File, java.util.Map, groovy.lang.Closure)` when no options to alter the traversal behavior are required.
      Parameters:
        `self` - a File (that happens to be a folder/directory)
        `closure` - the Closure to invoke on each file/directory and optionally returning a `FileVisitResult` value which can be used to control subsequent processing
      Throws:
        `FileNotFoundException` - if the given directory does not exist
        `IllegalArgumentException` - if the provided File object does not represent a directory
      Since:
        1.7.1
      See Also:
        `traverse(java.io.File, java.util.Map, groovy.lang.Closure)`

    - #### traverse

          public static void traverse​(File self,
                                      Map<String,​?> options)
                               throws FileNotFoundException,
                                      IllegalArgumentException

      Invokes the closure specified with key 'visit' in the options Map for each descendant file in this directory tree. Convenience method for `traverse(java.io.File, java.util.Map, groovy.lang.Closure)` allowing the 'visit' closure to be included in the options Map rather than as a parameter.
      Parameters:
        `self` - a File (that happens to be a folder/directory)
        `options` - a Map of options to alter the traversal behavior
      Throws:
        `FileNotFoundException` - if the given directory does not exist
        `IllegalArgumentException` - if the provided File object does not represent a directory or illegal filter combinations are supplied
      Since:
        1.7.1
      See Also:
        `traverse(java.io.File, java.util.Map, groovy.lang.Closure)`

    - #### eachFileRecurse

          public static void eachFileRecurse​(File self,
                                             Closure closure)
                                      throws FileNotFoundException,
                                             IllegalArgumentException

      Processes each descendant file in this directory and any sub-directories. Processing consists of calling `closure` passing it the current file (which may be a normal file or subdirectory) and then if a subdirectory was encountered, recursively processing the subdirectory.
      Parameters:
        `self` - a File (that happens to be a folder/directory)
        `closure` - a Closure
      Throws:
        `FileNotFoundException` - if the given directory does not exist
        `IllegalArgumentException` - if the provided File object does not represent a directory
      Since:
        1.0
      See Also:
        `eachFileRecurse(java.io.File, groovy.io.FileType, groovy.lang.Closure)`

    - #### eachDirRecurse

          public static void eachDirRecurse​(File self,
                                            Closure closure)
                                     throws FileNotFoundException,
                                            IllegalArgumentException

      Recursively processes each descendant subdirectory in this directory. Processing consists of calling `closure` passing it the current subdirectory and then recursively processing that subdirectory. Regular files are ignored during traversal.
      Parameters:
        `self` - a File (that happens to be a folder/directory)
        `closure` - a closure
      Throws:
        `FileNotFoundException` - if the given directory does not exist
        `IllegalArgumentException` - if the provided File object does not represent a directory
      Since:
        1.5.0
      See Also:
        `eachFileRecurse(java.io.File, groovy.io.FileType, groovy.lang.Closure)`

    - #### eachFileMatch

          public static void eachFileMatch​(File self,
                                           FileType fileType,
                                           Object nameFilter,
                                           Closure closure)
                                    throws FileNotFoundException,
                                           IllegalArgumentException

      Invokes the closure for each file whose name (file.name) matches the given nameFilter in the given directory - calling the `DefaultGroovyMethods.isCase(java.lang.Object, java.lang.Object)` method to determine if a match occurs. This method can be used with different kinds of filters like regular expressions, classes, ranges etc. Both regular files and subdirectories may be candidates for matching depending on the value of fileType.

           // collect names of files in baseDir matching supplied regex pattern
           import static groovy.io.FileType.*
           def names = []
           baseDir.eachFileMatch FILES, ~/foo\d\.txt/, { names << it.name }
           assert names == ['foo1.txt', 'foo2.txt']

           // remove all *.bak files in baseDir
           baseDir.eachFileMatch FILES, ~/.*\.bak/, { File bak -> bak.delete() }

           // print out files > 4K in size from baseDir
           baseDir.eachFileMatch FILES, { new File(baseDir, it).size() > 4096 }, { println "$it.name ${it.size()}" }

      Parameters:
        `self` - a File (that happens to be a folder/directory)
        `fileType` - whether normal files or directories or both should be processed
        `nameFilter` - the filter to perform on the name of the file/directory (using the `DefaultGroovyMethods.isCase(java.lang.Object, java.lang.Object)` method)
        `closure` - the closure to invoke
      Throws:
        `FileNotFoundException` - if the given directory does not exist
        `IllegalArgumentException` - if the provided File object does not represent a directory
      Since:
        1.7.1

    - #### eachFileMatch

          public static void eachFileMatch​(File self,
                                           Object nameFilter,
                                           Closure closure)
                                    throws FileNotFoundException,
                                           IllegalArgumentException

      Invokes the closure for each file whose name (file.name) matches the given nameFilter in the given directory - calling the `DefaultGroovyMethods.isCase(java.lang.Object, java.lang.Object)` method to determine if a match occurs. This method can be used with different kinds of filters like regular expressions, classes, ranges etc. Both regular files and subdirectories are matched.
      Parameters:
        `self` - a File (that happens to be a folder/directory)
        `nameFilter` - the nameFilter to perform on the name of the file (using the `DefaultGroovyMethods.isCase(java.lang.Object, java.lang.Object)` method)
        `closure` - the closure to invoke
      Throws:
        `FileNotFoundException` - if the given directory does not exist
        `IllegalArgumentException` - if the provided File object does not represent a directory
      Since:
        1.5.0
      See Also:
        `eachFileMatch(java.io.File, groovy.io.FileType, java.lang.Object, groovy.lang.Closure)`

    - #### eachDirMatch

          public static void eachDirMatch​(File self,
                                          Object nameFilter,
                                          Closure closure)
                                   throws FileNotFoundException,
                                          IllegalArgumentException

      Invokes the closure for each subdirectory whose name (dir.name) matches the given nameFilter in the given directory - calling the `DefaultGroovyMethods.isCase(java.lang.Object, java.lang.Object)` method to determine if a match occurs. This method can be used with different kinds of filters like regular expressions, classes, ranges etc. Only subdirectories are matched; regular files are ignored.
      Parameters:
        `self` - a File (that happens to be a folder/directory)
        `nameFilter` - the nameFilter to perform on the name of the directory (using the `DefaultGroovyMethods.isCase(java.lang.Object, java.lang.Object)` method)
        `closure` - the closure to invoke
      Throws:
        `FileNotFoundException` - if the given directory does not exist
        `IllegalArgumentException` - if the provided File object does not represent a directory
      Since:
        1.5.0
      See Also:
        `eachFileMatch(java.io.File, groovy.io.FileType, java.lang.Object, groovy.lang.Closure)`

    - #### deleteDir

          public static boolean deleteDir​(File self)

      Deletes a directory with all contained files and subdirectories.

      The method returns

      - true, when deletion was successful
      - true, when it is called for a non existing directory
      - false, when it is called for a file which isn't a directory
      - false, when directory couldn't be deleted
      Parameters:
        `self` - a File
      Returns:
        true if the file doesn't exist or deletion was successful
      Since:
        1.6.0

    - #### renameTo

          public static boolean renameTo​(File self,
                                         String newPathName)

      Renames the file. It's a shortcut for `File.renameTo(File)`
      Parameters:
        `self` - a File
        `newPathName` - The new pathname for the named file
      Returns:
        `true` if and only if the renaming succeeded; `false` otherwise
      Since:
        1.7.4

    - #### relativePath

          public static String relativePath​(File self,
                                            File to)
                                     throws IOException

      Relative path to file.
      Parameters:
        `self` - the `File` to calculate the path from
        `to` - the `File` to calculate the path to
      Returns:
        the relative path between the files
      Throws:
        `IOException`

    - #### asWritable

          public static File asWritable​(File file)

      Converts this File to a `Writable`.
      Parameters:
        `file` - a File
      Returns:
        a File which wraps the input file and which implements Writable
      Since:
        1.0

    - #### asType

          public static <T> T asType​(File f,
                                     Class<T> c)

      Converts this File to a `Writable` or delegates to default `DefaultGroovyMethods.asType(java.lang.Object, java.lang.Class)`.
      Parameters:
        `f` - a File
        `c` - the desired class
      Returns:
        the converted object
      Since:
        1.0

    - #### asWritable

          public static File asWritable​(File file,
                                        String encoding)

      Allows a file to return a Writable implementation that can output itself to a Writer stream.
      Parameters:
        `file` - a File
        `encoding` - the encoding to be used when reading the file's contents
      Returns:
        File which wraps the input file and which implements Writable
      Since:
        1.0

    - #### newReader

          public static BufferedReader newReader​(File file)
                                          throws IOException

      Create a buffered reader for this file.
      Parameters:
        `file` - a File
      Returns:
        a BufferedReader
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.0

    - #### newReader

          public static BufferedReader newReader​(File file,
                                                 String charset)
                                          throws FileNotFoundException,
                                                 UnsupportedEncodingException

      Create a buffered reader for this file, using the specified charset as the encoding.
      Parameters:
        `file` - a File
        `charset` - the charset for this File
      Returns:
        a BufferedReader
      Throws:
        `FileNotFoundException` - if the File was not found
        `UnsupportedEncodingException` - if the encoding specified is not supported
      Since:
        1.0

    - #### withReader

          public static <T> T withReader​(File file,
                                         Closure<T> closure)
                                  throws IOException

      Create a new BufferedReader for this file and then passes it into the closure, ensuring the reader is closed after the closure returns.
      Parameters:
        `file` - a file object
        `closure` - a closure
      Returns:
        the value returned by the closure
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.5.2

    - #### withReader

          public static <T> T withReader​(File file,
                                         String charset,
                                         Closure<T> closure)
                                  throws IOException

      Create a new BufferedReader for this file using the specified charset and then passes it into the closure, ensuring the reader is closed after the closure returns.
      Parameters:
        `file` - a file object
        `charset` - the charset for this input stream
        `closure` - a closure
      Returns:
        the value returned by the closure
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.6.0

    - #### newOutputStream

          public static BufferedOutputStream newOutputStream​(File file)
                                                      throws IOException

      Create a buffered output stream for this file.
      Parameters:
        `file` - a file object
      Returns:
        the created OutputStream
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.0

    - #### newDataOutputStream

          public static DataOutputStream newDataOutputStream​(File file)
                                                      throws IOException

      Creates a new data output stream for this file.
      Parameters:
        `file` - a file object
      Returns:
        the created DataOutputStream
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.5.0

    - #### withOutputStream

          public static Object withOutputStream​(File file,
                                                Closure closure)
                                         throws IOException

      Creates a new OutputStream for this file and passes it into the closure. This method ensures the stream is closed after the closure returns.
      Parameters:
        `file` - a File
        `closure` - a closure
      Returns:
        the value returned by the closure
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.5.2
      See Also:
        `IOGroovyMethods.withStream(java.io.OutputStream, groovy.lang.Closure)`

    - #### withInputStream

          public static Object withInputStream​(File file,
                                               Closure closure)
                                        throws IOException

      Create a new InputStream for this file and passes it into the closure. This method ensures the stream is closed after the closure returns.
      Parameters:
        `file` - a File
        `closure` - a closure
      Returns:
        the value returned by the closure
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.5.2
      See Also:
        `IOGroovyMethods.withStream(java.io.InputStream, groovy.lang.Closure)`

    - #### withInputStream

          public static <T> T withInputStream​(URL url,
                                              Closure<T> closure)
                                       throws IOException

      Creates a new InputStream for this URL and passes it into the closure. This method ensures the stream is closed after the closure returns.
      Parameters:
        `url` - a URL
        `closure` - a closure
      Returns:
        the value returned by the closure
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.5.2
      See Also:
        `IOGroovyMethods.withStream(java.io.InputStream, groovy.lang.Closure)`

    - #### withDataOutputStream

          public static <T> T withDataOutputStream​(File file,
                                                   Closure<T> closure)
                                            throws IOException

      Create a new DataOutputStream for this file and passes it into the closure. This method ensures the stream is closed after the closure returns.
      Parameters:
        `file` - a File
        `closure` - a closure
      Returns:
        the value returned by the closure
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.5.2
      See Also:
        `IOGroovyMethods.withStream(java.io.OutputStream, groovy.lang.Closure)`

    - #### withDataInputStream

          public static <T> T withDataInputStream​(File file,
                                                  Closure<T> closure)
                                           throws IOException

      Create a new DataInputStream for this file and passes it into the closure. This method ensures the stream is closed after the closure returns.
      Parameters:
        `file` - a File
        `closure` - a closure
      Returns:
        the value returned by the closure
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.5.2
      See Also:
        `IOGroovyMethods.withStream(java.io.InputStream, groovy.lang.Closure)`

    - #### newWriter

          public static BufferedWriter newWriter​(File file)
                                          throws IOException

      Create a buffered writer for this file.
      Parameters:
        `file` - a File
      Returns:
        a BufferedWriter
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.0

    - #### newWriter

          public static BufferedWriter newWriter​(File file,
                                                 boolean append)
                                          throws IOException

      Creates a buffered writer for this file, optionally appending to the existing file content.
      Parameters:
        `file` - a File
        `append` - true if data should be appended to the file
      Returns:
        a BufferedWriter
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.0

    - #### newWriter

          public static BufferedWriter newWriter​(File file,
                                                 String charset,
                                                 boolean append)
                                          throws IOException

      Helper method to create a buffered writer for a file without writing a BOM.
      Parameters:
        `file` - a File
        `charset` - the name of the encoding used to write in this file
        `append` - true if in append mode
      Returns:
        a BufferedWriter
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.0

    - #### newWriter

          public static BufferedWriter newWriter​(File file,
                                                 String charset,
                                                 boolean append,
                                                 boolean writeBom)
                                          throws IOException

      Helper method to create a buffered writer for a file. If the given charset is "UTF-16BE" or "UTF-16LE" (or an equivalent alias), the requisite byte order mark is written to the stream before the writer is returned.
      Parameters:
        `file` - a File
        `charset` - the name of the encoding used to write in this file
        `append` - true if in append mode
        `writeBom` - whether to write a BOM
      Returns:
        a BufferedWriter
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        2.5.0

    - #### newWriter

          public static BufferedWriter newWriter​(File file,
                                                 String charset)
                                          throws IOException

      Creates a buffered writer for this file, writing data without writing a BOM, using a specified encoding.
      Parameters:
        `file` - a File
        `charset` - the name of the encoding used to write in this file
      Returns:
        a BufferedWriter
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.0

    - #### withWriter

          public static <T> T withWriter​(File file,
                                         Closure<T> closure)
                                  throws IOException

      Creates a new BufferedWriter for this file, passes it to the closure, and ensures the stream is flushed and closed after the closure returns.
      Parameters:
        `file` - a File
        `closure` - a closure
      Returns:
        the value returned by the closure
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.5.2

    - #### withWriter

          public static <T> T withWriter​(File file,
                                         String charset,
                                         Closure<T> closure)
                                  throws IOException

      Creates a new BufferedWriter for this file, passes it to the closure, and ensures the stream is flushed and closed after the closure returns. The writer will use the given charset encoding. If the given charset is "UTF-16BE" or "UTF-16LE" (or an equivalent alias), the requisite byte order mark is written to the stream when the writer is created.
      Parameters:
        `file` - a File
        `charset` - the charset used
        `closure` - a closure
      Returns:
        the value returned by the closure
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.5.2

    - #### withWriterAppend

          public static <T> T withWriterAppend​(File file,
                                               String charset,
                                               Closure<T> closure)
                                        throws IOException

      Create a new BufferedWriter which will append to this file. If the given charset is "UTF-16BE" or "UTF-16LE" (or an equivalent alias), the requisite byte order mark is written to the stream when the writer is created. The writer is passed to the closure and will be closed before this method returns.
      Parameters:
        `file` - a File
        `charset` - the charset used
        `closure` - a closure
      Returns:
        the value returned by the closure
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.5.2

    - #### withWriterAppend

          public static <T> T withWriterAppend​(File file,
                                               Closure<T> closure)
                                        throws IOException

      Create a new BufferedWriter for this file in append mode. The writer is passed to the closure and is closed after the closure returns.
      Parameters:
        `file` - a File
        `closure` - a closure
      Returns:
        the value returned by the closure
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.5.2

    - #### newPrintWriter

          public static PrintWriter newPrintWriter​(File file)
                                            throws IOException

      Create a new PrintWriter for this file.
      Parameters:
        `file` - a File
      Returns:
        the created PrintWriter
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.0

    - #### newPrintWriter

          public static PrintWriter newPrintWriter​(File file,
                                                   String charset)
                                            throws IOException

      Create a new PrintWriter for this file, using specified charset. If the given charset is "UTF-16BE" or "UTF-16LE" (or an equivalent alias), the requisite byte order mark is written to the stream before the writer is returned.
      Parameters:
        `file` - a File
        `charset` - the charset
      Returns:
        a PrintWriter
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.0

    - #### withPrintWriter

          public static <T> T withPrintWriter​(File file,
                                              Closure<T> closure)
                                       throws IOException

      Create a new PrintWriter for this file which is then passed it into the given closure. This method ensures its the writer is closed after the closure returns.
      Parameters:
        `file` - a File
        `closure` - the closure to invoke with the PrintWriter
      Returns:
        the value returned by the closure
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.5.2

    - #### withPrintWriter

          public static <T> T withPrintWriter​(File file,
                                              String charset,
                                              Closure<T> closure)
                                       throws IOException

      Create a new PrintWriter with a specified charset for this file. If the given charset is "UTF-16BE" or "UTF-16LE" (or an equivalent alias), the requisite byte order mark is written to the stream when the writer is created. The writer is passed to the closure, and will be closed before this method returns.
      Parameters:
        `file` - a File
        `charset` - the charset
        `closure` - the closure to invoke with the PrintWriter
      Returns:
        the value returned by the closure
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.5.2

    - #### withReader

          public static <T> T withReader​(URL url,
                                         Closure<T> closure)
                                  throws IOException

      Helper method to create a new BufferedReader for a URL and then passes it to the closure. The reader is closed after the closure returns.
      Parameters:
        `url` - a URL
        `closure` - the closure to invoke with the reader
      Returns:
        the value returned by the closure
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.5.2

    - #### withReader

          public static <T> T withReader​(URL url,
                                         String charset,
                                         Closure<T> closure)
                                  throws IOException

      Helper method to create a new Reader for a URL and then passes it to the closure. The reader is closed after the closure returns.
      Parameters:
        `url` - a URL
        `charset` - the charset used
        `closure` - the closure to invoke with the reader
      Returns:
        the value returned by the closure
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.5.6

    - #### newInputStream

          public static BufferedInputStream newInputStream​(File file)
                                                    throws FileNotFoundException

      Creates a buffered input stream for this file.
      Parameters:
        `file` - a File
      Returns:
        a BufferedInputStream of the file
      Throws:
        `FileNotFoundException` - if the file is not found.
      Since:
        1.0

    - #### newInputStream

          public static BufferedInputStream newInputStream​(URL url)
                                                    throws MalformedURLException,
                                                           IOException

      Creates a buffered input stream for this URL.
      Parameters:
        `url` - a URL
      Returns:
        a BufferedInputStream for the URL
      Throws:
        `MalformedURLException` - is thrown if the URL is not well formed
        `IOException` - if an I/O error occurs while creating the input stream
      Since:
        1.5.2

    - #### newInputStream

          public static BufferedInputStream newInputStream​(URL url,
                                                           Map parameters)
                                                    throws MalformedURLException,
                                                           IOException

      Creates a buffered input stream for this URL. The default connection parameters can be modified by adding keys to the parameters map:
      - connectTimeout : the connection timeout
      - readTimeout : the read timeout
      - useCaches : set the use cache property for the URL connection
      - allowUserInteraction : set the user interaction flag for the URL connection
      - requestProperties : a map of properties to be passed to the URL connection
      Parameters:
        `url` - a URL
        `parameters` - connection parameters
      Returns:
        a BufferedInputStream for the URL
      Throws:
        `MalformedURLException` - is thrown if the URL is not well formed
        `IOException` - if an I/O error occurs while creating the input stream
      Since:
        1.8.1

    - #### newReader

          public static BufferedReader newReader​(URL url)
                                          throws MalformedURLException,
                                                 IOException

      Creates a buffered reader for this URL.
      Parameters:
        `url` - a URL
      Returns:
        a BufferedReader for the URL
      Throws:
        `MalformedURLException` - is thrown if the URL is not well formed
        `IOException` - if an I/O error occurs while creating the input stream
      Since:
        1.5.5

    - #### newReader

          public static BufferedReader newReader​(URL url,
                                                 Map parameters)
                                          throws MalformedURLException,
                                                 IOException

      Creates a buffered reader for this URL. The default connection parameters can be modified by adding keys to the parameters map:
      - connectTimeout : the connection timeout
      - readTimeout : the read timeout
      - useCaches : set the use cache property for the URL connection
      - allowUserInteraction : set the user interaction flag for the URL connection
      - requestProperties : a map of properties to be passed to the URL connection
      Parameters:
        `url` - a URL
        `parameters` - connection parameters
      Returns:
        a BufferedReader for the URL
      Throws:
        `MalformedURLException` - is thrown if the URL is not well formed
        `IOException` - if an I/O error occurs while creating the input stream
      Since:
        1.8.1

    - #### newReader

          public static BufferedReader newReader​(URL url,
                                                 String charset)
                                          throws MalformedURLException,
                                                 IOException

      Creates a buffered reader for this URL using the given encoding.
      Parameters:
        `url` - a URL
        `charset` - opens the stream with a specified charset
      Returns:
        a BufferedReader for the URL
      Throws:
        `MalformedURLException` - is thrown if the URL is not well formed
        `IOException` - if an I/O error occurs while creating the input stream
      Since:
        1.5.5

    - #### newReader

          public static BufferedReader newReader​(URL url,
                                                 Map parameters,
                                                 String charset)
                                          throws MalformedURLException,
                                                 IOException

      Creates a buffered reader for this URL using the given encoding.
      Parameters:
        `url` - a URL
        `parameters` - connection parameters
        `charset` - opens the stream with a specified charset
      Returns:
        a BufferedReader for the URL
      Throws:
        `MalformedURLException` - is thrown if the URL is not well formed
        `IOException` - if an I/O error occurs while creating the input stream
      Since:
        1.8.1

    - #### newDataInputStream

          public static DataInputStream newDataInputStream​(File file)
                                                    throws FileNotFoundException

      Create a data input stream for this file
      Parameters:
        `file` - a File
      Returns:
        a DataInputStream of the file
      Throws:
        `FileNotFoundException` - if the file is not found.
      Since:
        1.5.0

    - #### eachByte

          public static void eachByte​(File self,
                                      Closure closure)
                               throws IOException

      Traverse through each byte of this File
      Parameters:
        `self` - a File
        `closure` - a closure
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.0
      See Also:
        `IOGroovyMethods.eachByte(java.io.InputStream, groovy.lang.Closure)`

    - #### eachByte

          public static void eachByte​(File self,
                                      int bufferLen,
                                      Closure closure)
                               throws IOException

      Traverse through the bytes of this File, bufferLen bytes at a time.
      Parameters:
        `self` - a File
        `bufferLen` - the length of the buffer to use.
        `closure` - a 2 parameter closure which is passed the byte[] and a number of bytes successfully read.
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.7.4
      See Also:
        `IOGroovyMethods.eachByte(java.io.InputStream, int, groovy.lang.Closure)`

    - #### eachByte

          public static void eachByte​(URL url,
                                      Closure closure)
                               throws IOException

      Reads the InputStream from this URL, passing each byte to the given closure. The URL stream will be closed before this method returns.
      Parameters:
        `url` - url to iterate over
        `closure` - closure to apply to each byte
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.0
      See Also:
        `IOGroovyMethods.eachByte(java.io.InputStream, groovy.lang.Closure)`

    - #### eachByte

          public static void eachByte​(URL url,
                                      int bufferLen,
                                      Closure closure)
                               throws IOException

      Reads the InputStream from this URL, passing a byte[] and a number of bytes to the given closure. The URL stream will be closed before this method returns.
      Parameters:
        `url` - url to iterate over
        `bufferLen` - the length of the buffer to use.
        `closure` - a 2 parameter closure which is passed the byte[] and a number of bytes successfully read.
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.8
      See Also:
        `IOGroovyMethods.eachByte(java.io.InputStream, int, groovy.lang.Closure)`

    - #### filterLine

          public static Writable filterLine​(File self,
                                            Closure closure)
                                     throws IOException

      Filters the lines of a File and creates a Writable in return to stream the filtered lines.
      Parameters:
        `self` - a File
        `closure` - a closure which returns a boolean indicating to filter the line or not
      Returns:
        a Writable closure
      Throws:
        `IOException` - if `self` is not readable
      Since:
        1.0
      See Also:
        `IOGroovyMethods.filterLine(java.io.Reader, groovy.lang.Closure)`

    - #### filterLine

          public static Writable filterLine​(File self,
                                            String charset,
                                            Closure closure)
                                     throws IOException

      Filters the lines of a File and creates a Writable in return to stream the filtered lines.
      Parameters:
        `self` - a File
        `charset` - opens the file with a specified charset
        `closure` - a closure which returns a boolean indicating to filter the line or not
      Returns:
        a Writable closure
      Throws:
        `IOException` - if an IOException occurs
      Since:
        1.6.8
      See Also:
        `IOGroovyMethods.filterLine(java.io.Reader, groovy.lang.Closure)`

    - #### filterLine

          public static void filterLine​(File self,
                                        Writer writer,
                                        Closure closure)
                                 throws IOException

      Filter the lines from this File, and write them to the given writer based on the given closure predicate.
      Parameters:
        `self` - a File
        `writer` - a writer destination to write filtered lines to
        `closure` - a closure which takes each line as a parameter and returns `true` if the line should be written to this writer.
      Throws:
        `IOException` - if `self` is not readable
      Since:
        1.0
      See Also:
        `IOGroovyMethods.filterLine(java.io.Reader, java.io.Writer, groovy.lang.Closure)`

    - #### filterLine

          public static void filterLine​(File self,
                                        Writer writer,
                                        String charset,
                                        Closure closure)
                                 throws IOException

      Filter the lines from this File, and write them to the given writer based on the given closure predicate.
      Parameters:
        `self` - a File
        `writer` - a writer destination to write filtered lines to
        `charset` - opens the file with a specified charset
        `closure` - a closure which takes each line as a parameter and returns `true` if the line should be written to this writer.
      Throws:
        `IOException` - if an IO error occurs
      Since:
        1.6.8
      See Also:
        `IOGroovyMethods.filterLine(java.io.Reader, java.io.Writer, groovy.lang.Closure)`

    - #### filterLine

          public static Writable filterLine​(URL self,
                                            Closure predicate)
                                     throws IOException

      Filter lines from a URL using a closure predicate. The closure will be passed each line as a String, and it should return `true` if the line should be passed to the writer.
      Parameters:
        `self` - a URL
        `predicate` - a closure which returns boolean and takes a line
      Returns:
        a writable which writes out the filtered lines
      Throws:
        `IOException` - if an IO exception occurs
      Since:
        1.6.8
      See Also:
        `IOGroovyMethods.filterLine(java.io.Reader, groovy.lang.Closure)`

    - #### filterLine

          public static Writable filterLine​(URL self,
                                            String charset,
                                            Closure predicate)
                                     throws IOException

      Filter lines from a URL using a closure predicate. The closure will be passed each line as a String, and it should return `true` if the line should be passed to the writer.
      Parameters:
        `self` - the URL
        `charset` - opens the URL with a specified charset
        `predicate` - a closure which returns boolean and takes a line
      Returns:
        a writable which writes out the filtered lines
      Throws:
        `IOException` - if an IO exception occurs
      Since:
        1.6.8
      See Also:
        `IOGroovyMethods.filterLine(java.io.Reader, groovy.lang.Closure)`

    - #### filterLine

          public static void filterLine​(URL self,
                                        Writer writer,
                                        Closure predicate)
                                 throws IOException

      Uses a closure to filter lines from this URL and pass them to the given writer. The closure will be passed each line as a String, and it should return `true` if the line should be passed to the writer.
      Parameters:
        `self` - the URL
        `writer` - a writer to write output to
        `predicate` - a closure which returns true if a line should be accepted
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.6.8
      See Also:
        `IOGroovyMethods.filterLine(java.io.Reader, java.io.Writer, groovy.lang.Closure)`

    - #### filterLine

          public static void filterLine​(URL self,
                                        Writer writer,
                                        String charset,
                                        Closure predicate)
                                 throws IOException

      Uses a closure to filter lines from this URL and pass them to the given writer. The closure will be passed each line as a String, and it should return `true` if the line should be passed to the writer.
      Parameters:
        `self` - the URL
        `writer` - a writer to write output to
        `charset` - opens the URL with a specified charset
        `predicate` - a closure which returns true if a line should be accepted
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.6.8
      See Also:
        `IOGroovyMethods.filterLine(java.io.Reader, java.io.Writer, groovy.lang.Closure)`

    - #### readBytes

          public static byte[] readBytes​(File file)
                                  throws IOException

      Reads the content of the file into a byte array.
      Parameters:
        `file` - a File
      Returns:
        a byte array with the contents of the file.
      Throws:
        `IOException` - if an IOException occurs.
      Since:
        1.0

    - #### toURI

          public static URI toURI​(CharSequence self)
                           throws URISyntaxException

      Transforms a CharSequence representing a URI into a URI object.
      Parameters:
        `self` - the CharSequence representing a URI
      Returns:
        a URI
      Throws:
        `URISyntaxException` - is thrown if the URI is not well formed.
      Since:
        1.8.2

    - #### toURI

          public static URI toURI​(String self)
                           throws URISyntaxException

      Transforms a String representing a URI into a URI object.
      Parameters:
        `self` - the String representing a URI
      Returns:
        a URI
      Throws:
        `URISyntaxException` - is thrown if the URI is not well formed.
      Since:
        1.0

    - #### toURL

          public static URL toURL​(CharSequence self)
                           throws MalformedURLException

      Transforms a CharSequence representing a URL into a URL object.
      Parameters:
        `self` - the CharSequence representing a URL
      Returns:
        a URL
      Throws:
        `MalformedURLException` - is thrown if the URL is not well formed.
      Since:
        1.8.2

    - #### toURL

          public static URL toURL​(String self)
                           throws MalformedURLException

      Transforms a String representing a URL into a URL object.
      Parameters:
        `self` - the String representing a URL
      Returns:
        a URL
      Throws:
        `MalformedURLException` - is thrown if the URL is not well formed.
      Since:
        1.0