Package org.apache.commons.configuration2

# Class PropertiesConfiguration.PropertiesReader

java.lang.Object
java.io.Reader
java.io.BufferedReader
java.io.LineNumberReader
org.apache.commons.configuration2.PropertiesConfiguration.PropertiesReader

All Implemented Interfaces:
  `Closeable`, `AutoCloseable`, `Readable`

Direct Known Subclasses:
  `PropertiesConfiguration.JupPropertiesReader`

Enclosing class:
  PropertiesConfiguration

public static class PropertiesConfiguration.PropertiesReader extends LineNumberReader
This class is used to read properties lines. These lines do not terminate with new-line chars but rather when there is no backslash sign a the end of the line. This is used to concatenate multiple lines for readability.

- ## Field Summary

  ### Fields inherited from class java.io.Reader

  `lock`

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `PropertiesReader(Reader reader)`
  Constructs a new instance.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `List<String>`
  `getCommentLines()`
  Gets the comment lines that have been read for the last property.
  `String`
  `getPropertyName()`
  Gets the name of the last read property.
  `String`
  `getPropertySeparator()`
  Gets the separator that was used for the last read property.
  `String`
  `getPropertyValue()`
  Gets the value of the last read property.
  `protected void`
  `initPropertyName(String name)`
  Sets the name of the current property.
  `protected void`
  `initPropertySeparator(String value)`
  Sets the separator of the current property.
  `protected void`
  `initPropertyValue(String value)`
  Sets the value of the current property.
  `boolean`
  `nextProperty()`
  Parses the next property from the input stream and stores the found name and value in internal fields.
  `protected void`
  `parseProperty(String line)`
  Parses a line read from the properties file.
  `String`
  `readProperty()`
  Reads a property line.
  `protected String`
  `unescapePropertyName(String name)`
  Performs unescaping on the given property name.
  `protected String`
  `unescapePropertyValue(String value)`
  Performs unescaping on the given property value.

  ### Methods inherited from class java.io.LineNumberReader

  `getLineNumber, mark, read, read, readLine, reset, setLineNumber, skip`

  ### Methods inherited from class java.io.BufferedReader

  `close, lines, markSupported, ready`

  ### Methods inherited from class java.io.Reader

  `read, read`

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

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

- ## Constructor Details

  - ### PropertiesReader

    public PropertiesReader(Reader reader)
    Constructs a new instance.
    Parameters:
      `reader` - A Reader.

- ## Method Details

  - ### getCommentLines

    public List<String> getCommentLines()
    Gets the comment lines that have been read for the last property.
    Returns:
      the comment lines for the last property returned by `readProperty()`
    Since:
      1.3

  - ### getPropertyName

    public String getPropertyName()
    Gets the name of the last read property. This method can be called after `nextProperty()` was invoked and its return value was true.
    Returns:
      the name of the last read property
    Since:
      1.3

  - ### getPropertySeparator

    public String getPropertySeparator()
    Gets the separator that was used for the last read property. The separator can be stored so that it can later be restored when saving the configuration.
    Returns:
      the separator for the last read property
    Since:
      1.7

  - ### getPropertyValue

    public String getPropertyValue()
    Gets the value of the last read property. This method can be called after `nextProperty()` was invoked and its return value was true.
    Returns:
      the value of the last read property
    Since:
      1.3

  - ### initPropertyName

    protected void initPropertyName(String name)
    Sets the name of the current property. This method can be called by `parseProperty()` for storing the results of the parse operation. It also ensures that the property key is correctly escaped.
    Parameters:
      `name` - the name of the current property
    Since:
      1.7

  - ### initPropertySeparator

    protected void initPropertySeparator(String value)
    Sets the separator of the current property. This method can be called by `parseProperty()`. It allows the associated layout object to keep track of the property separators. When saving the configuration the separators can be restored.
    Parameters:
      `value` - the separator used for the current property
    Since:
      1.7

  - ### initPropertyValue

    protected void initPropertyValue(String value)
    Sets the value of the current property. This method can be called by `parseProperty()` for storing the results of the parse operation. It also ensures that the property value is correctly escaped.
    Parameters:
      `value` - the value of the current property
    Since:
      1.7

  - ### nextProperty

    public boolean nextProperty() throws IOException
    Parses the next property from the input stream and stores the found name and value in internal fields. These fields can be obtained using the provided getter methods. The return value indicates whether EOF was reached (false) or whether further properties are available (true).
    Returns:
      a flag if further properties are available
    Throws:
      `IOException` - if an error occurs
    Since:
      1.3

  - ### parseProperty

    protected void parseProperty(String line)
    Parses a line read from the properties file. This method is called for each non-comment line read from the source file. Its task is to split the passed in line into the property key and its value. The results of the parse operation can be stored by calling the `initPropertyXXX()` methods.
    Parameters:
      `line` - the line read from the properties file
    Since:
      1.7

  - ### readProperty

    public String readProperty() throws IOException
    Reads a property line. Returns null if Stream is at EOF. Concatenates lines ending with "\". Skips lines beginning with "#" or "!" and empty lines. The return value is a property definition (`&lt;name&gt;` = `&lt;value&gt;`)
    Returns:
      A string containing a property value or null
    Throws:
      `IOException` - in case of an I/O error

  - ### unescapePropertyName

    protected String unescapePropertyName(String name)
    Performs unescaping on the given property name.
    Parameters:
      `name` - the property name
    Returns:
      the unescaped property name
    Since:
      2.4

  - ### unescapePropertyValue

    protected String unescapePropertyValue(String value)
    Performs unescaping on the given property value.
    Parameters:
      `value` - the property value
    Returns:
      the unescaped property value
    Since:
      2.4