org.xml.sax.helpers
Class XMLReaderAdapter

java.lang.Object
  |
  +--org.xml.sax.helpers.XMLReaderAdapter

public class XMLReaderAdapter

extends java.lang.Object

implements Parser, ContentHandler

Adapt a SAX2 XMLReader as a SAX1 Parser.

This module, both source code and documentation, is in the Public Domain, and comes with NO WARRANTY.

This class wraps a SAX2 XMLReader and makes it act as a SAX1 Parser. The XMLReader must support a true value for the http://xml.org/sax/features/namespace-prefixes property or parsing will fail with a SAXException; if the XMLReader supports a false value for the http://xml.org/sax/features/namespaces property, that will also be used to improve efficiency.

Note that this is not the version shipped with SAX 2.0.1; this class throws NullPointerExceptions when setter methods are called with null parameters; the 2.0.1 version does not exhibit this behaviour.

Since:

SAX 2.0

See Also:

Parser, XMLReader

Constructor Summary

XMLReaderAdapter()
Create a new adapter.

XMLReaderAdapter(XMLReader xmlReader)
Create a new adapter.

Method Summary

void	characters(char[] ch, int start, int length) Adapt a SAX2 characters event.
void	endDocument() End document event.
void	endElement(java.lang.String uri, java.lang.String localName, java.lang.String qName) Adapt a SAX2 end element event.
void	endPrefixMapping(java.lang.String prefix) Adapt a SAX2 end prefix mapping event.
void	ignorableWhitespace(char[] ch, int start, int length) Adapt a SAX2 ignorable whitespace event.
void	parse(InputSource input) Parse the document.
void	parse(java.lang.String systemId) Parse the document.
void	processingInstruction(java.lang.String target, java.lang.String data) Adapt a SAX2 processing instruction event.
void	setDocumentHandler(DocumentHandler handler) Register the SAX1 document event handler.
void	setDocumentLocator(Locator locator) Set a document locator.
void	setDTDHandler(DTDHandler handler) Register the DTD event handler.
void	setEntityResolver(EntityResolver resolver) Register the entity resolver.
void	setErrorHandler(ErrorHandler handler) Register the error event handler.
void	setLocale(java.util.Locale locale) Set the locale for error reporting.
void	skippedEntity(java.lang.String name) Adapt a SAX2 skipped entity event.
void	startDocument() Start document event.
void	startElement(java.lang.String uri, java.lang.String localName, java.lang.String qName, Attributes atts) Adapt a SAX2 start element event.
void	startPrefixMapping(java.lang.String prefix, java.lang.String uri) Adapt a SAX2 start prefix mapping event.

Methods inherited from class java.lang.Object

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

Constructor Detail

XMLReaderAdapter

public XMLReaderAdapter()
                 throws SAXException

Create a new adapter.

Use the "org.xml.sax.driver" property to locate the SAX2 driver to embed.

Throws:

SAXException - If the embedded driver cannot be instantiated or if the org.xml.sax.driver property is not specified.

XMLReaderAdapter

public XMLReaderAdapter(XMLReader xmlReader)

Create a new adapter.

Create a new adapter, wrapped around a SAX2 XMLReader. The adapter will make the XMLReader act like a SAX1 Parser.

Parameters:

xmlReader - The SAX2 XMLReader to wrap.

Throws:

java.lang.NullPointerException - If the argument is null.

Method Detail

setLocale

public void setLocale(java.util.Locale locale)
               throws SAXException

Set the locale for error reporting.

This is not supported in SAX2, and will always throw an exception.

Specified by:

setLocale in interface Parser

Parameters:

The - locale for error reporting.

See Also:

Parser.setLocale(java.util.Locale)

setEntityResolver

public void setEntityResolver(EntityResolver resolver)

Register the entity resolver.

Specified by:

setEntityResolver in interface Parser

Parameters:

resolver - The new resolver.

See Also:

Parser.setEntityResolver(org.xml.sax.EntityResolver)

setDTDHandler

public void setDTDHandler(DTDHandler handler)

Register the DTD event handler.

Specified by:

setDTDHandler in interface Parser

Parameters:

handler - The new DTD event handler.

See Also:

Parser.setDTDHandler(org.xml.sax.DTDHandler)

setDocumentHandler

public void setDocumentHandler(DocumentHandler handler)

Register the SAX1 document event handler.

Note that the SAX1 document handler has no Namespace support.

Specified by:

setDocumentHandler in interface Parser

Parameters:

handler - The new SAX1 document event handler.

See Also:

Parser.setDocumentHandler(org.xml.sax.DocumentHandler)

setErrorHandler

public void setErrorHandler(ErrorHandler handler)

Register the error event handler.

Specified by:

setErrorHandler in interface Parser

Parameters:

handler - The new error event handler.

See Also:

Parser.setErrorHandler(org.xml.sax.ErrorHandler)

parse

public void parse(java.lang.String systemId)
           throws java.io.IOException,
                  SAXException

Parse the document.

This method will throw an exception if the embedded XMLReader does not support the http://xml.org/sax/features/namespace-prefixes property.

Specified by:

parse in interface Parser

Parameters:

systemId - The absolute URL of the document.

Throws:

java.io.IOException - If there is a problem reading the raw content of the document.

SAXException - If there is a problem processing the document.

See Also:

parse(org.xml.sax.InputSource), Parser.parse(java.lang.String)

parse

public void parse(InputSource input)
           throws java.io.IOException,
                  SAXException

Parse the document.

This method will throw an exception if the embedded XMLReader does not support the http://xml.org/sax/features/namespace-prefixes property.

Specified by:

parse in interface Parser

Parameters:

input - An input source for the document.

Throws:

java.io.IOException - If there is a problem reading the raw content of the document.

SAXException - If there is a problem processing the document.

See Also:

parse(java.lang.String), Parser.parse(org.xml.sax.InputSource)

setDocumentLocator

public void setDocumentLocator(Locator locator)

Set a document locator.

Specified by:

setDocumentLocator in interface ContentHandler

Parameters:

locator - The document locator.

See Also:

ContentHandler.setDocumentLocator(org.xml.sax.Locator)

startDocument

public void startDocument()
                   throws SAXException

Start document event.

Specified by:

startDocument in interface ContentHandler

Throws:

SAXException - The client may raise a processing exception.

See Also:

ContentHandler.startDocument()

endDocument

public void endDocument()
                 throws SAXException

End document event.

Specified by:

endDocument in interface ContentHandler

Throws:

SAXException - The client may raise a processing exception.

See Also:

ContentHandler.endDocument()

startPrefixMapping

public void startPrefixMapping(java.lang.String prefix,
                               java.lang.String uri)

Adapt a SAX2 start prefix mapping event.

Specified by:

startPrefixMapping in interface ContentHandler

Parameters:

prefix - The prefix being mapped.

uri - The Namespace URI being mapped to.

See Also:

ContentHandler.startPrefixMapping(java.lang.String, java.lang.String)

endPrefixMapping

public void endPrefixMapping(java.lang.String prefix)

Adapt a SAX2 end prefix mapping event.

Specified by:

endPrefixMapping in interface ContentHandler

Parameters:

prefix - The prefix being mapped.

See Also:

ContentHandler.endPrefixMapping(java.lang.String)

startElement

public void startElement(java.lang.String uri,
                         java.lang.String localName,
                         java.lang.String qName,
                         Attributes atts)
                  throws SAXException

Adapt a SAX2 start element event.

Specified by:

startElement in interface ContentHandler

Parameters:

uri - The Namespace URI.

localName - The Namespace local name.

qName - The qualified (prefixed) name.

atts - The SAX2 attributes.

Throws:

SAXException - The client may raise a processing exception.

See Also:

ContentHandler.endDocument()

endElement

public void endElement(java.lang.String uri,
                       java.lang.String localName,
                       java.lang.String qName)
                throws SAXException

Adapt a SAX2 end element event.

Specified by:

endElement in interface ContentHandler

Parameters:

uri - The Namespace URI.

localName - The Namespace local name.

qName - The qualified (prefixed) name.

Throws:

SAXException - The client may raise a processing exception.

See Also:

ContentHandler.endElement(java.lang.String, java.lang.String, java.lang.String)

characters

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

Adapt a SAX2 characters event.

Specified by:

characters in interface ContentHandler

Parameters:

ch - An array of characters.

start - The starting position in the array.

length - The number of characters to use.

Throws:

SAXException - The client may raise a processing exception.

See Also:

ContentHandler.characters(char[], int, int)

ignorableWhitespace

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

Adapt a SAX2 ignorable whitespace event.

Specified by:

ignorableWhitespace in interface ContentHandler

Parameters:

ch - An array of characters.

start - The starting position in the array.

length - The number of characters to use.

Throws:

SAXException - The client may raise a processing exception.

See Also:

ContentHandler.ignorableWhitespace(char[], int, int)

processingInstruction

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

Adapt a SAX2 processing instruction event.

Specified by:

processingInstruction in interface ContentHandler

Parameters:

target - The processing instruction target.

data - The remainder of the processing instruction

Throws:

SAXException - The client may raise a processing exception.

See Also:

ContentHandler.processingInstruction(java.lang.String, java.lang.String)

skippedEntity

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

Adapt a SAX2 skipped entity event.

Specified by:

skippedEntity in interface ContentHandler

Parameters:

name - The name of the skipped entity.

See Also:

ContentHandler.skippedEntity(java.lang.String)