groovy.util
Class XmlSlurper

java.lang.Object
  org.xml.sax.helpers.DefaultHandler
      groovy.util.XmlSlurper

All Implemented Interfaces:

ContentHandler, DTDHandler, EntityResolver, ErrorHandler

public class XmlSlurper
extends DefaultHandler

Parse XML into a document tree that may be traversed similar to XPath expressions. For example:

 def rootNode = new XmlSlurper().parseText(
    '<root><one a1="uno!"/><two>Some text!</two></root>' )

 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'] }
 

Note that in some cases, a 'selector' expression may not resolve to a single node. For example:

 def rootNode = new XmlSlurper().parseText(
    '''<root>
         <a>one!</a>
         <a>two!</a>
       </root>''' )

 assert rootNode.a.size() == 2
 rootNode.a.each { assert it.text() in ['one!','two!'] }
 

Author:

John Wilson

See Also:

GPathResult

Constructor Summary

XmlSlurper()
Uses the defaults of not validating and namespace aware.

XmlSlurper(boolean validating, boolean namespaceAware)

XmlSlurper(SAXParser parser)

XmlSlurper(XMLReader reader)

Method Summary

void	characters(char[] ch, int start, int length)
void	endDocument()
void	endElement(String namespaceURI, String localName, String qName)
GPathResult	getDocument()
DTDHandler	getDTDHandler()
EntityResolver	getEntityResolver()
ErrorHandler	getErrorHandler()
boolean	getFeature(String uri)
Object	getProperty(String uri)
GPathResult	parse(File file) Parses the content of the given file as XML turning it into a GPathResult object
GPathResult	parse(InputSource input) Parse the content of the specified input source into a GPathResult object
GPathResult	parse(InputStream input) Parse the content of the specified input stream into an GPathResult Object.
GPathResult	parse(Reader in) Parse the content of the specified reader into a GPathResult Object.
GPathResult	parse(String uri) Parse the content of the specified URI into a GPathResult Object
GPathResult	parseText(String text) A helper method to parse the given text as XML
void	setDTDHandler(DTDHandler dtdHandler)
void	setEntityBaseUrl(URL base) Resolves entities against using the supplied URL as the base for relative URLs
void	setEntityResolver(EntityResolver entityResolver)
void	setErrorHandler(ErrorHandler errorHandler)
void	setFeature(String uri, boolean value)
void	setKeepWhitespace(boolean keepWhitespace)
void	setProperty(String uri, Object value)
void	startDocument()
void	startElement(String namespaceURI, String localName, String qName, Attributes atts)
void	startPrefixMapping(String tag, String uri)

Methods inherited from class org.xml.sax.helpers.DefaultHandler

endPrefixMapping, error, fatalError, ignorableWhitespace, notationDecl, processingInstruction, resolveEntity, setDocumentLocator, skippedEntity, unparsedEntityDecl, warning

Methods inherited from class java.lang.Object

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

Constructor Detail

XmlSlurper

public XmlSlurper()
           throws ParserConfigurationException,
                  SAXException

Uses the defaults of not validating and namespace aware.

Throws:

ParserConfigurationException - if a parser cannot be created which satisfies the requested configuration.

SAXException - for SAX errors.

XmlSlurper

public XmlSlurper(boolean validating,
                  boolean namespaceAware)
           throws ParserConfigurationException,
                  SAXException

Throws:

ParserConfigurationException

SAXException

XmlSlurper

public XmlSlurper(XMLReader reader)

XmlSlurper

public XmlSlurper(SAXParser parser)
           throws SAXException

Throws:

SAXException

Method Detail

setKeepWhitespace

public void setKeepWhitespace(boolean keepWhitespace)

Parameters:

keepWhitespace - If true then whitespace before elements is kept. The default is to discard the whitespace.

getDocument

public GPathResult getDocument()

Returns:

The GPathResult instance created by consuming a stream of SAX events Note if one of the parse methods has been called then this returns null Note if this is called more than once all calls after the first will return null

parse

public GPathResult parse(InputSource input)
                  throws IOException,
                         SAXException

Parse the content of the specified input source into a GPathResult object

Parameters:

input - the InputSource to parse

Returns:

An object which supports GPath expressions

Throws:

SAXException - Any SAX exception, possibly wrapping another exception.

IOException - An IO exception from the parser, possibly from a byte stream or character stream supplied by the application.

parse

public GPathResult parse(File file)
                  throws IOException,
                         SAXException

Parses the content of the given file as XML turning it into a GPathResult object

Parameters:

file - the File to parse

Returns:

An object which supports GPath expressions

Throws:

SAXException - Any SAX exception, possibly wrapping another exception.

IOException - An IO exception from the parser, possibly from a byte stream or character stream supplied by the application.

parse

public GPathResult parse(InputStream input)
                  throws IOException,
                         SAXException

Parse the content of the specified input stream into an GPathResult Object. Note that using this method will not provide the parser with any URI for which to find DTDs etc. It is up to you to close the InputStream after parsing is complete (if required).

Parameters:

input - the InputStream to parse

Returns:

An object which supports GPath expressions

Throws:

SAXException - Any SAX exception, possibly wrapping another exception.

IOException - An IO exception from the parser, possibly from a byte stream or character stream supplied by the application.

parse

public GPathResult parse(Reader in)
                  throws IOException,
                         SAXException

Parse the content of the specified reader into a GPathResult Object. Note that using this method will not provide the parser with any URI for which to find DTDs etc. It is up to you to close the Reader after parsing is complete (if required).

Parameters:

in - the Reader to parse

Returns:

An object which supports GPath expressions

Throws:

SAXException - Any SAX exception, possibly wrapping another exception.

IOException - An IO exception from the parser, possibly from a byte stream or character stream supplied by the application.

parse

public GPathResult parse(String uri)
                  throws IOException,
                         SAXException

Parse the content of the specified URI into a GPathResult Object

Parameters:

uri - a String containing the URI to parse

Returns:

An object which supports GPath expressions

Throws:

SAXException - Any SAX exception, possibly wrapping another exception.

IOException - An IO exception from the parser, possibly from a byte stream or character stream supplied by the application.

parseText

public GPathResult parseText(String text)
                      throws IOException,
                             SAXException

A helper method to parse the given text as XML

Parameters:

text - a String containing XML to parse

Returns:

An object which supports GPath expressions

Throws:

SAXException - Any SAX exception, possibly wrapping another exception.

IOException - An IO exception from the parser, possibly from a byte stream or character stream supplied by the application.

getDTDHandler

public DTDHandler getDTDHandler()

getEntityResolver

public EntityResolver getEntityResolver()

getErrorHandler

public ErrorHandler getErrorHandler()

getFeature

public boolean getFeature(String uri)
                   throws SAXNotRecognizedException,
                          SAXNotSupportedException

Throws:

SAXNotRecognizedException

SAXNotSupportedException

getProperty

public Object getProperty(String uri)
                   throws SAXNotRecognizedException,
                          SAXNotSupportedException

Throws:

SAXNotRecognizedException

SAXNotSupportedException

setDTDHandler

public void setDTDHandler(DTDHandler dtdHandler)

setEntityResolver

public void setEntityResolver(EntityResolver entityResolver)

setEntityBaseUrl

public void setEntityBaseUrl(URL base)

Resolves entities against using the supplied URL as the base for relative URLs

Parameters:

base - The URL used to resolve relative URLs

setErrorHandler

public void setErrorHandler(ErrorHandler errorHandler)

setFeature

public void setFeature(String uri,
                       boolean value)
                throws SAXNotRecognizedException,
                       SAXNotSupportedException

Throws:

SAXNotRecognizedException

SAXNotSupportedException

setProperty

public void setProperty(String uri,
                        Object value)
                 throws SAXNotRecognizedException,
                        SAXNotSupportedException

Throws:

SAXNotRecognizedException

SAXNotSupportedException

startDocument

public void startDocument()
                   throws SAXException

Specified by:

startDocument in interface ContentHandler

Overrides:

startDocument in class DefaultHandler

Throws:

SAXException

startPrefixMapping

public void startPrefixMapping(String tag,
                               String uri)
                        throws SAXException

Specified by:

startPrefixMapping in interface ContentHandler

Overrides:

startPrefixMapping in class DefaultHandler

Throws:

SAXException

startElement

public void startElement(String namespaceURI,
                         String localName,
                         String qName,
                         Attributes atts)
                  throws SAXException

Specified by:

startElement in interface ContentHandler

Overrides:

startElement in class DefaultHandler

Throws:

SAXException

characters

public void characters(char[] ch,
                       int start,
                       int length)
                throws SAXException

Specified by:

characters in interface ContentHandler

Overrides:

characters in class DefaultHandler

Throws:

SAXException

endElement

public void endElement(String namespaceURI,
                       String localName,
                       String qName)
                throws SAXException

Specified by:

endElement in interface ContentHandler

Overrides:

endElement in class DefaultHandler

Throws:

SAXException

endDocument

public void endDocument()
                 throws SAXException

Specified by:

endDocument in interface ContentHandler

Overrides:

endDocument in class DefaultHandler

Throws:

SAXException