groovy.util

## Class XmlParser

- java.lang.Object
- - groovy.util.XmlParser

- All Implemented Interfaces:
    org.xml.sax.ContentHandler

      public class XmlParser
      extends java.lang.Object
      implements org.xml.sax.ContentHandler

  A helper class for parsing XML into a tree of Node instances for a simple way of processing XML. This parser does not preserve the XML InfoSet - if that's what you need try using W3C DOM, dom4j, JDOM, XOM etc. This parser ignores comments and processing instructions and converts the XML into a Node for each element in the XML with attributes and child Nodes and Strings. This simple model is sufficient for most simple use cases of processing XML.

  Example usage:

       def xml = '<root><one a1="uno!"/><two>Some text!</two></root>'
       def rootNode = new XmlParser().parseText(xml)
       assert rootNode.name() == 'root'
       assert rootNode.one[0].@a1 == 'uno!'
       assert rootNode.two.text() == 'Some text!'
       rootNode.children().each { assert it.name() in ['one','two'] }

  Author:
    James Strachan, Paul King

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `XmlParser()` Creates a non-validating and non-namespace-aware `XmlParser` which does not allow DOCTYPE declarations in documents.
    `XmlParser(boolean validating, boolean namespaceAware)` Creates a `XmlParser` which does not allow DOCTYPE declarations in documents.
    `XmlParser(boolean validating, boolean namespaceAware, boolean allowDocTypeDeclaration)` Creates a `XmlParser`.
    `XmlParser(javax.xml.parsers.SAXParser parser)`
    `XmlParser(org.xml.sax.XMLReader reader)`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `protected void` | `addTextToNode()`
    `void` | `characters(char[] buffer, int start, int length)`
    `protected Node` | `createNode(Node parent, java.lang.Object name, java.util.Map attributes)` Creates a new node with the given parent, name, and attributes.
    `void` | `endDocument()`
    `void` | `endElement(java.lang.String namespaceURI, java.lang.String localName, java.lang.String qName)`
    `void` | `endPrefixMapping(java.lang.String prefix)`
    `org.xml.sax.Locator` | `getDocumentLocator()`
    `org.xml.sax.DTDHandler` | `getDTDHandler()`
    `protected java.lang.Object` | `getElementName(java.lang.String namespaceURI, java.lang.String localName, java.lang.String qName)` Return a name given the namespaceURI, localName and qName.
    `org.xml.sax.EntityResolver` | `getEntityResolver()`
    `org.xml.sax.ErrorHandler` | `getErrorHandler()`
    `boolean` | `getFeature(java.lang.String uri)`
    `java.lang.Object` | `getProperty(java.lang.String uri)`
    `protected org.xml.sax.XMLReader` | `getXMLReader()`
    `void` | `ignorableWhitespace(char[] buffer, int start, int len)`
    `boolean` | `isKeepIgnorableWhitespace()` Returns the current keep ignorable whitespace setting.
    `boolean` | `isNamespaceAware()` Determine if namespace handling is enabled.
    `boolean` | `isTrimWhitespace()` Returns the current trim whitespace setting.
    `Node` | `parse(java.io.File file)` Parses the content of the given file as XML turning it into a tree of Nodes.
    `Node` | `parse(org.xml.sax.InputSource input)` Parse the content of the specified input source into a tree of Nodes.
    `Node` | `parse(java.io.InputStream input)` Parse the content of the specified input stream into a tree of Nodes.
    `Node` | `parse(java.io.Reader in)` Parse the content of the specified reader into a tree of Nodes.
    `Node` | `parse(java.lang.String uri)` Parse the content of the specified URI into a tree of Nodes.
    `Node` | `parseText(java.lang.String text)` A helper method to parse the given text as XML.
    `void` | `processingInstruction(java.lang.String target, java.lang.String data)`
    `void` | `setDocumentLocator(org.xml.sax.Locator locator)`
    `void` | `setDTDHandler(org.xml.sax.DTDHandler dtdHandler)`
    `void` | `setEntityResolver(org.xml.sax.EntityResolver entityResolver)`
    `void` | `setErrorHandler(org.xml.sax.ErrorHandler errorHandler)`
    `void` | `setFeature(java.lang.String uri, boolean value)`
    `void` | `setKeepIgnorableWhitespace(boolean keepIgnorableWhitespace)` Sets the keep ignorable whitespace setting value.
    `void` | `setNamespaceAware(boolean namespaceAware)` Enable and/or disable namespace handling.
    `void` | `setProperty(java.lang.String uri, java.lang.Object value)`
    `void` | `setTrimWhitespace(boolean trimWhitespace)` Sets the trim whitespace setting value.
    `void` | `skippedEntity(java.lang.String name)`
    `void` | `startDocument()`
    `void` | `startElement(java.lang.String namespaceURI, java.lang.String localName, java.lang.String qName, org.xml.sax.Attributes list)`
    `void` | `startPrefixMapping(java.lang.String prefix, java.lang.String namespaceURI)`

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

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

- - ### Constructor Detail

    - #### XmlParser

          public XmlParser()
                    throws javax.xml.parsers.ParserConfigurationException,
                           org.xml.sax.SAXException

      Creates a non-validating and non-namespace-aware `XmlParser` which does not allow DOCTYPE declarations in documents.
      Throws:
        `javax.xml.parsers.ParserConfigurationException` - if no parser which satisfies the requested configuration can be created.
        `org.xml.sax.SAXException` - for SAX errors.

    - #### XmlParser

          public XmlParser(boolean validating,
                           boolean namespaceAware)
                    throws javax.xml.parsers.ParserConfigurationException,
                           org.xml.sax.SAXException

      Creates a `XmlParser` which does not allow DOCTYPE declarations in documents.
      Parameters:
        `validating` - `true` if the parser should validate documents as they are parsed; false otherwise.
        `namespaceAware` - `true` if the parser should provide support for XML namespaces; `false` otherwise.
      Throws:
        `javax.xml.parsers.ParserConfigurationException` - if no parser which satisfies the requested configuration can be created.
        `org.xml.sax.SAXException` - for SAX errors.

    - #### XmlParser

          public XmlParser(boolean validating,
                           boolean namespaceAware,
                           boolean allowDocTypeDeclaration)
                    throws javax.xml.parsers.ParserConfigurationException,
                           org.xml.sax.SAXException

      Creates a `XmlParser`.
      Parameters:
        `validating` - `true` if the parser should validate documents as they are parsed; false otherwise.
        `namespaceAware` - `true` if the parser should provide support for XML namespaces; `false` otherwise.
        `allowDocTypeDeclaration` - `true` if the parser should provide support for DOCTYPE declarations; `false` otherwise.
      Throws:
        `javax.xml.parsers.ParserConfigurationException` - if no parser which satisfies the requested configuration can be created.
        `org.xml.sax.SAXException` - for SAX errors.

    - #### XmlParser

          public XmlParser(org.xml.sax.XMLReader reader)

    - #### XmlParser

          public XmlParser(javax.xml.parsers.SAXParser parser)
                    throws org.xml.sax.SAXException

      Throws:
        `org.xml.sax.SAXException`

  - ### Method Detail

    - #### isTrimWhitespace

          public boolean isTrimWhitespace()

      Returns the current trim whitespace setting.
      Returns:
        true if whitespace will be trimmed

    - #### setTrimWhitespace

          public void setTrimWhitespace(boolean trimWhitespace)

      Sets the trim whitespace setting value.
      Parameters:
        `trimWhitespace` - the desired setting value

    - #### isKeepIgnorableWhitespace

          public boolean isKeepIgnorableWhitespace()

      Returns the current keep ignorable whitespace setting.
      Returns:
        true if ignorable whitespace will be kept (default false)

    - #### setKeepIgnorableWhitespace

          public void setKeepIgnorableWhitespace(boolean keepIgnorableWhitespace)

      Sets the keep ignorable whitespace setting value.
      Parameters:
        `keepIgnorableWhitespace` - the desired new value

    - #### parse

          public Node parse(java.io.File file)
                     throws java.io.IOException,
                            org.xml.sax.SAXException

      Parses the content of the given file as XML turning it into a tree of Nodes.
      Parameters:
        `file` - the File containing the XML to be parsed
      Returns:
        the root node of the parsed tree of Nodes
      Throws:
        `org.xml.sax.SAXException` - Any SAX exception, possibly wrapping another exception.
        `java.io.IOException` - An IO exception from the parser, possibly from a byte stream or character stream supplied by the application.

    - #### parse

          public Node parse(org.xml.sax.InputSource input)
                     throws java.io.IOException,
                            org.xml.sax.SAXException

      Parse the content of the specified input source into a tree of Nodes.
      Parameters:
        `input` - the InputSource for the XML to parse
      Returns:
        the root node of the parsed tree of Nodes
      Throws:
        `org.xml.sax.SAXException` - Any SAX exception, possibly wrapping another exception.
        `java.io.IOException` - An IO exception from the parser, possibly from a byte stream or character stream supplied by the application.

    - #### parse

          public Node parse(java.io.InputStream input)
                     throws java.io.IOException,
                            org.xml.sax.SAXException

      Parse the content of the specified input stream into a tree of Nodes.

      Note that using this method will not provide the parser with any URI for which to find DTDs etc

      Parameters:
        `input` - an InputStream containing the XML to be parsed
      Returns:
        the root node of the parsed tree of Nodes
      Throws:
        `org.xml.sax.SAXException` - Any SAX exception, possibly wrapping another exception.
        `java.io.IOException` - An IO exception from the parser, possibly from a byte stream or character stream supplied by the application.

    - #### parse

          public Node parse(java.io.Reader in)
                     throws java.io.IOException,
                            org.xml.sax.SAXException

      Parse the content of the specified reader into a tree of Nodes.

      Note that using this method will not provide the parser with any URI for which to find DTDs etc

      Parameters:
        `in` - a Reader to read the XML to be parsed
      Returns:
        the root node of the parsed tree of Nodes
      Throws:
        `org.xml.sax.SAXException` - Any SAX exception, possibly wrapping another exception.
        `java.io.IOException` - An IO exception from the parser, possibly from a byte stream or character stream supplied by the application.

    - #### parse

          public Node parse(java.lang.String uri)
                     throws java.io.IOException,
                            org.xml.sax.SAXException

      Parse the content of the specified URI into a tree of Nodes.
      Parameters:
        `uri` - a String containing a uri pointing to the XML to be parsed
      Returns:
        the root node of the parsed tree of Nodes
      Throws:
        `org.xml.sax.SAXException` - Any SAX exception, possibly wrapping another exception.
        `java.io.IOException` - An IO exception from the parser, possibly from a byte stream or character stream supplied by the application.

    - #### parseText

          public Node parseText(java.lang.String text)
                         throws java.io.IOException,
                                org.xml.sax.SAXException

      A helper method to parse the given text as XML.
      Parameters:
        `text` - the XML text to parse
      Returns:
        the root node of the parsed tree of Nodes
      Throws:
        `org.xml.sax.SAXException` - Any SAX exception, possibly wrapping another exception.
        `java.io.IOException` - An IO exception from the parser, possibly from a byte stream or character stream supplied by the application.

    - #### isNamespaceAware

          public boolean isNamespaceAware()

      Determine if namespace handling is enabled.
      Returns:
        true if namespace handling is enabled

    - #### setNamespaceAware

          public void setNamespaceAware(boolean namespaceAware)

      Enable and/or disable namespace handling.
      Parameters:
        `namespaceAware` - the new desired value

    - #### getDTDHandler

          public org.xml.sax.DTDHandler getDTDHandler()

    - #### getEntityResolver

          public org.xml.sax.EntityResolver getEntityResolver()

    - #### getErrorHandler

          public org.xml.sax.ErrorHandler getErrorHandler()

    - #### getFeature

          public boolean getFeature(java.lang.String uri)
                             throws org.xml.sax.SAXNotRecognizedException,
                                    org.xml.sax.SAXNotSupportedException

      Throws:
        `org.xml.sax.SAXNotRecognizedException`
        `org.xml.sax.SAXNotSupportedException`

    - #### getProperty

          public java.lang.Object getProperty(java.lang.String uri)
                                       throws org.xml.sax.SAXNotRecognizedException,
                                              org.xml.sax.SAXNotSupportedException

      Throws:
        `org.xml.sax.SAXNotRecognizedException`
        `org.xml.sax.SAXNotSupportedException`

    - #### setDTDHandler

          public void setDTDHandler(org.xml.sax.DTDHandler dtdHandler)

    - #### setEntityResolver

          public void setEntityResolver(org.xml.sax.EntityResolver entityResolver)

    - #### setErrorHandler

          public void setErrorHandler(org.xml.sax.ErrorHandler errorHandler)

    - #### setFeature

          public void setFeature(java.lang.String uri,
                                 boolean value)
                          throws org.xml.sax.SAXNotRecognizedException,
                                 org.xml.sax.SAXNotSupportedException

      Throws:
        `org.xml.sax.SAXNotRecognizedException`
        `org.xml.sax.SAXNotSupportedException`

    - #### setProperty

          public void setProperty(java.lang.String uri,
                                  java.lang.Object value)
                           throws org.xml.sax.SAXNotRecognizedException,
                                  org.xml.sax.SAXNotSupportedException

      Throws:
        `org.xml.sax.SAXNotRecognizedException`
        `org.xml.sax.SAXNotSupportedException`

    - #### startDocument

          public void startDocument()
                             throws org.xml.sax.SAXException

      Specified by:
        `startDocument` in interface `org.xml.sax.ContentHandler`
      Throws:
        `org.xml.sax.SAXException`

    - #### endDocument

          public void endDocument()
                           throws org.xml.sax.SAXException

      Specified by:
        `endDocument` in interface `org.xml.sax.ContentHandler`
      Throws:
        `org.xml.sax.SAXException`

    - #### startElement

          public void startElement(java.lang.String namespaceURI,
                                   java.lang.String localName,
                                   java.lang.String qName,
                                   org.xml.sax.Attributes list)
                            throws org.xml.sax.SAXException

      Specified by:
        `startElement` in interface `org.xml.sax.ContentHandler`
      Throws:
        `org.xml.sax.SAXException`

    - #### endElement

          public void endElement(java.lang.String namespaceURI,
                                 java.lang.String localName,
                                 java.lang.String qName)
                          throws org.xml.sax.SAXException

      Specified by:
        `endElement` in interface `org.xml.sax.ContentHandler`
      Throws:
        `org.xml.sax.SAXException`

    - #### characters

          public void characters(char[] buffer,
                                 int start,
                                 int length)
                          throws org.xml.sax.SAXException

      Specified by:
        `characters` in interface `org.xml.sax.ContentHandler`
      Throws:
        `org.xml.sax.SAXException`

    - #### startPrefixMapping

          public void startPrefixMapping(java.lang.String prefix,
                                         java.lang.String namespaceURI)
                                  throws org.xml.sax.SAXException

      Specified by:
        `startPrefixMapping` in interface `org.xml.sax.ContentHandler`
      Throws:
        `org.xml.sax.SAXException`

    - #### endPrefixMapping

          public void endPrefixMapping(java.lang.String prefix)
                                throws org.xml.sax.SAXException

      Specified by:
        `endPrefixMapping` in interface `org.xml.sax.ContentHandler`
      Throws:
        `org.xml.sax.SAXException`

    - #### ignorableWhitespace

          public void ignorableWhitespace(char[] buffer,
                                          int start,
                                          int len)
                                   throws org.xml.sax.SAXException

      Specified by:
        `ignorableWhitespace` in interface `org.xml.sax.ContentHandler`
      Throws:
        `org.xml.sax.SAXException`

    - #### processingInstruction

          public void processingInstruction(java.lang.String target,
                                            java.lang.String data)
                                     throws org.xml.sax.SAXException

      Specified by:
        `processingInstruction` in interface `org.xml.sax.ContentHandler`
      Throws:
        `org.xml.sax.SAXException`

    - #### getDocumentLocator

          public org.xml.sax.Locator getDocumentLocator()

    - #### setDocumentLocator

          public void setDocumentLocator(org.xml.sax.Locator locator)

      Specified by:
        `setDocumentLocator` in interface `org.xml.sax.ContentHandler`

    - #### skippedEntity

          public void skippedEntity(java.lang.String name)
                             throws org.xml.sax.SAXException

      Specified by:
        `skippedEntity` in interface `org.xml.sax.ContentHandler`
      Throws:
        `org.xml.sax.SAXException`

    - #### getXMLReader

          protected org.xml.sax.XMLReader getXMLReader()

    - #### addTextToNode

          protected void addTextToNode()

    - #### createNode

          protected Node createNode(Node parent,
                                    java.lang.Object name,
                                    java.util.Map attributes)

      Creates a new node with the given parent, name, and attributes. The default implementation returns an instance of `groovy.util.Node`.
      Parameters:
        `parent` - the parent node, or null if the node being created is the root node
        `name` - an Object representing the name of the node (typically an instance of `QName`)
        `attributes` - a Map of attribute names to attribute values
      Returns:
        a new Node instance representing the current node

    - #### getElementName

          protected java.lang.Object getElementName(java.lang.String namespaceURI,
                                                    java.lang.String localName,
                                                    java.lang.String qName)

      Return a name given the namespaceURI, localName and qName.
      Parameters:
        `namespaceURI` - the namespace URI
        `localName` - the local name
        `qName` - the qualified name
      Returns:
        the newly created representation of the name