groovy.util
[Java] Class XmlParser

java.lang.Object
  groovy.util.XmlParser

All Implemented Interfaces:

ContentHandler

public class XmlParser
extends Object

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'] }
 

Authors:

James Strachan

Paul King

XmlParser

public XmlParser()

Creates a non-validating and non-namespace-aware XmlParser which does not allow DOCTYPE declarations in documents.

throws:

ParserConfigurationException if no parser which satisfies the requested configuration can be created.

throws:

SAXException for SAX errors.

XmlParser

public XmlParser(boolean validating, boolean namespaceAware)

Creates a XmlParser which does not allow DOCTYPE declarations in documents.

throws:

ParserConfigurationException if no parser which satisfies the requested configuration can be created.

throws:

SAXException for SAX errors.

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.

XmlParser

public XmlParser(boolean validating, boolean namespaceAware, boolean allowDocTypeDeclaration)

Creates a XmlParser.

throws:

ParserConfigurationException if no parser which satisfies the requested configuration can be created.

throws:

SAXException for SAX errors.

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.

XmlParser

public XmlParser(XMLReader reader)

XmlParser

public XmlParser(SAXParser parser)

addTextToNode

protected void addTextToNode()

characters

public void characters(char[] buffer, int start, int length)

createNode

protected Node createNode(Node parent, Object name, 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

endDocument

public void endDocument()

endElement

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

endPrefixMapping

public void endPrefixMapping(String prefix)

getDTDHandler

public DTDHandler getDTDHandler()

getDocumentLocator

public Locator getDocumentLocator()

getElementName

protected Object getElementName(String namespaceURI, String localName, String qName)

getEntityResolver

public EntityResolver getEntityResolver()

getErrorHandler

public ErrorHandler getErrorHandler()

getFeature

public boolean getFeature(String uri)

getProperty

public Object getProperty(String uri)

getXMLReader

protected XMLReader getXMLReader()

ignorableWhitespace

public void ignorableWhitespace(char[] buffer, int start, int len)

isNamespaceAware

public boolean isNamespaceAware()

Determine if namespace handling is enabled.

Returns:

true if namespace handling is enabled

isTrimWhitespace

public boolean isTrimWhitespace()

Returns the current trim whitespace setting.

Returns:

true if whitespace will be trimmed

parse

public Node parse(File file)

Parses the content of the given file as XML turning it into a tree of Nodes.

throws:

SAXException Any SAX exception, possibly wrapping another exception.

throws:

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

Parameters:

file - the File containing the XML to be parsed

Returns:

the root node of the parsed tree of Nodes

parse

public Node parse(InputSource input)

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

throws:

SAXException Any SAX exception, possibly wrapping another exception.

throws:

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

Parameters:

input - the InputSource for the XML to parse

Returns:

the root node of the parsed tree of Nodes

parse

public Node parse(InputStream input)

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

throws:

SAXException Any SAX exception, possibly wrapping another exception.

throws:

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

Parameters:

input - an InputStream containing the XML to be parsed

Returns:

the root node of the parsed tree of Nodes

parse

public Node parse(Reader in)

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

throws:

SAXException Any SAX exception, possibly wrapping another exception.

throws:

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

Parameters:

in - a Reader to read the XML to be parsed

Returns:

the root node of the parsed tree of Nodes

parse

public Node parse(String uri)

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

throws:

SAXException Any SAX exception, possibly wrapping another exception.

throws:

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

Parameters:

uri - a String containing a uri pointing to the XML to be parsed

Returns:

the root node of the parsed tree of Nodes

parseText

public Node parseText(String text)

A helper method to parse the given text as XML.

throws:

SAXException Any SAX exception, possibly wrapping another exception.

throws:

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

Parameters:

text - the XML text to parse

Returns:

the root node of the parsed tree of Nodes

processingInstruction

public void processingInstruction(String target, String data)

setDTDHandler

public void setDTDHandler(DTDHandler dtdHandler)

setDocumentLocator

public void setDocumentLocator(Locator locator)

setEntityResolver

public void setEntityResolver(EntityResolver entityResolver)

setErrorHandler

public void setErrorHandler(ErrorHandler errorHandler)

setFeature

public void setFeature(String uri, boolean value)

setNamespaceAware

public void setNamespaceAware(boolean namespaceAware)

Enable and/or disable namespace handling.

Parameters:

namespaceAware - the new desired value

setProperty

public void setProperty(String uri, Object value)

setTrimWhitespace

public void setTrimWhitespace(boolean trimWhitespace)

Sets the trim whitespace setting value.

Parameters:

trimWhitespace - the desired setting value

skippedEntity

public void skippedEntity(String name)

startDocument

public void startDocument()

startElement

public void startElement(String namespaceURI, String localName, String qName, Attributes list)

startPrefixMapping

public void startPrefixMapping(String prefix, String namespaceURI)

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