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Java Source Code / Java Documentation » XML » Piccolo » org.xml.sax.helpers 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


java.lang.Object
   org.xml.sax.helpers.DefaultHandler

DefaultHandler
public class DefaultHandler implements EntityResolver,DTDHandler,ContentHandler,ErrorHandler(Code)
Default base class for SAX2 event handlers.
This module, both source code and documentation, is in the Public Domain, and comes with NO WARRANTY. See http://www.saxproject.org for further information.

This class is available as a convenience base class for SAX2 applications: it provides default implementations for all of the callbacks in the four core SAX2 handler classes:

Application writers can extend this class when they need to implement only part of an interface; parser writers can instantiate this class to provide default handlers when the application has not supplied its own.

This class replaces the deprecated SAX1 org.xml.sax.HandlerBase HandlerBase class.


since:
   SAX 2.0
author:
   David Megginson,
version:
   2.0.1 (sax2r2)
See Also:   org.xml.sax.EntityResolver
See Also:   org.xml.sax.DTDHandler
See Also:   org.xml.sax.ContentHandler
See Also:   org.xml.sax.ErrorHandler




Method Summary
public  voidcharacters(char ch, int start, int length)
     Receive notification of character data inside an element.

By default, do nothing.

public  voidendDocument()
     Receive notification of the end of the document.

By default, do nothing.

public  voidendElement(String uri, String localName, String qName)
     Receive notification of the end of an element.

By default, do nothing.

public  voidendPrefixMapping(String prefix)
     Receive notification of the end of a Namespace mapping.

By default, do nothing.

public  voiderror(SAXParseException e)
     Receive notification of a recoverable parser error.

The default implementation does nothing.

public  voidfatalError(SAXParseException e)
     Report a fatal XML parsing error.
public  voidignorableWhitespace(char ch, int start, int length)
     Receive notification of ignorable whitespace in element content.

By default, do nothing.

public  voidnotationDecl(String name, String publicId, String systemId)
     Receive notification of a notation declaration.

By default, do nothing.

public  voidprocessingInstruction(String target, String data)
     Receive notification of a processing instruction.

By default, do nothing.

public  InputSourceresolveEntity(String publicId, String systemId)
     Resolve an external entity.

Always return null, so that the parser will use the system identifier provided in the XML document.

public  voidsetDocumentLocator(Locator locator)
     Receive a Locator object for document events.

By default, do nothing.

public  voidskippedEntity(String name)
     Receive notification of a skipped entity.

By default, do nothing.

public  voidstartDocument()
     Receive notification of the beginning of the document.

By default, do nothing.

public  voidstartElement(String uri, String localName, String qName, Attributes attributes)
     Receive notification of the start of an element.

By default, do nothing.

public  voidstartPrefixMapping(String prefix, String uri)
     Receive notification of the start of a Namespace mapping.

By default, do nothing.

public  voidunparsedEntityDecl(String name, String publicId, String systemId, String notationName)
     Receive notification of an unparsed entity declaration.

By default, do nothing.

public  voidwarning(SAXParseException e)
     Receive notification of a parser warning.

The default implementation does nothing.




Method Detail
characters
public void characters(char ch, int start, int length) throws SAXException(Code)
Receive notification of character data inside an element.

By default, do nothing. Application writers may override this method to take specific actions for each chunk of character data (such as adding the data to a node or buffer, or printing it to a file).


Parameters:
  ch - The characters.
Parameters:
  start - The start position in the character array.
Parameters:
  length - The number of characters to use from thecharacter array.
exception:
  org.xml.sax.SAXException - Any SAX exception, possiblywrapping another exception.
See Also:   org.xml.sax.ContentHandler.characters



endDocument
public void endDocument() throws SAXException(Code)
Receive notification of the end of the document.

By default, do nothing. Application writers may override this method in a subclass to take specific actions at the end of a document (such as finalising a tree or closing an output file).


exception:
  org.xml.sax.SAXException - Any SAX exception, possiblywrapping another exception.
See Also:   org.xml.sax.ContentHandler.endDocument



endElement
public void endElement(String uri, String localName, String qName) throws SAXException(Code)
Receive notification of the end of an element.

By default, do nothing. Application writers may override this method in a subclass to take specific actions at the end of each element (such as finalising a tree node or writing output to a file).


Parameters:
  uri - The Namespace URI, or the empty string if theelement has no Namespace URI or if Namespaceprocessing is not being performed.
Parameters:
  localName - The local name (without prefix), or theempty string if Namespace processing is not beingperformed.
Parameters:
  qName - The qualified name (with prefix), or theempty string if qualified names are not available.
exception:
  org.xml.sax.SAXException - Any SAX exception, possiblywrapping another exception.
See Also:   org.xml.sax.ContentHandler.endElement



endPrefixMapping
public void endPrefixMapping(String prefix) throws SAXException(Code)
Receive notification of the end of a Namespace mapping.

By default, do nothing. Application writers may override this method in a subclass to take specific actions at the end of each prefix mapping.


Parameters:
  prefix - The Namespace prefix being declared.
exception:
  org.xml.sax.SAXException - Any SAX exception, possiblywrapping another exception.
See Also:   org.xml.sax.ContentHandler.endPrefixMapping



error
public void error(SAXParseException e) throws SAXException(Code)
Receive notification of a recoverable parser error.

The default implementation does nothing. Application writers may override this method in a subclass to take specific actions for each error, such as inserting the message in a log file or printing it to the console.


Parameters:
  e - The warning information encoded as an exception.
exception:
  org.xml.sax.SAXException - Any SAX exception, possiblywrapping another exception.
See Also:   org.xml.sax.ErrorHandler.warning
See Also:   org.xml.sax.SAXParseException



fatalError
public void fatalError(SAXParseException e) throws SAXException(Code)
Report a fatal XML parsing error.

The default implementation throws a SAXParseException. Application writers may override this method in a subclass if they need to take specific actions for each fatal error (such as collecting all of the errors into a single report): in any case, the application must stop all regular processing when this method is invoked, since the document is no longer reliable, and the parser may no longer report parsing events.


Parameters:
  e - The error information encoded as an exception.
exception:
  org.xml.sax.SAXException - Any SAX exception, possiblywrapping another exception.
See Also:   org.xml.sax.ErrorHandler.fatalError
See Also:   org.xml.sax.SAXParseException



ignorableWhitespace
public void ignorableWhitespace(char ch, int start, int length) throws SAXException(Code)
Receive notification of ignorable whitespace in element content.

By default, do nothing. Application writers may override this method to take specific actions for each chunk of ignorable whitespace (such as adding data to a node or buffer, or printing it to a file).


Parameters:
  ch - The whitespace characters.
Parameters:
  start - The start position in the character array.
Parameters:
  length - The number of characters to use from thecharacter array.
exception:
  org.xml.sax.SAXException - Any SAX exception, possiblywrapping another exception.
See Also:   org.xml.sax.ContentHandler.ignorableWhitespace



notationDecl
public void notationDecl(String name, String publicId, String systemId) throws SAXException(Code)
Receive notification of a notation declaration.

By default, do nothing. Application writers may override this method in a subclass if they wish to keep track of the notations declared in a document.


Parameters:
  name - The notation name.
Parameters:
  publicId - The notation public identifier, or null if notavailable.
Parameters:
  systemId - The notation system identifier.
exception:
  org.xml.sax.SAXException - Any SAX exception, possiblywrapping another exception.
See Also:   org.xml.sax.DTDHandler.notationDecl



processingInstruction
public void processingInstruction(String target, String data) throws SAXException(Code)
Receive notification of a processing instruction.

By default, do nothing. Application writers may override this method in a subclass to take specific actions for each processing instruction, such as setting status variables or invoking other methods.


Parameters:
  target - The processing instruction target.
Parameters:
  data - The processing instruction data, or null ifnone is supplied.
exception:
  org.xml.sax.SAXException - Any SAX exception, possiblywrapping another exception.
See Also:   org.xml.sax.ContentHandler.processingInstruction



resolveEntity
public InputSource resolveEntity(String publicId, String systemId) throws IOException, SAXException(Code)
Resolve an external entity.

Always return null, so that the parser will use the system identifier provided in the XML document. This method implements the SAX default behaviour: application writers can override it in a subclass to do special translations such as catalog lookups or URI redirection.


Parameters:
  publicId - The public identifer, or null if none isavailable.
Parameters:
  systemId - The system identifier provided in the XML document. The new input source, or null to require thedefault behaviour.
exception:
  java.io.IOException - If there is an error settingup the new input source.
exception:
  org.xml.sax.SAXException - Any SAX exception, possiblywrapping another exception.
See Also:   org.xml.sax.EntityResolver.resolveEntity



setDocumentLocator
public void setDocumentLocator(Locator locator)(Code)
Receive a Locator object for document events.

By default, do nothing. Application writers may override this method in a subclass if they wish to store the locator for use with other document events.


Parameters:
  locator - A locator for all SAX document events.
See Also:   org.xml.sax.ContentHandler.setDocumentLocator
See Also:   org.xml.sax.Locator



skippedEntity
public void skippedEntity(String name) throws SAXException(Code)
Receive notification of a skipped entity.

By default, do nothing. Application writers may override this method in a subclass to take specific actions for each processing instruction, such as setting status variables or invoking other methods.


Parameters:
  name - The name of the skipped entity.
exception:
  org.xml.sax.SAXException - Any SAX exception, possiblywrapping another exception.
See Also:   org.xml.sax.ContentHandler.processingInstruction



startDocument
public void startDocument() throws SAXException(Code)
Receive notification of the beginning of the document.

By default, do nothing. Application writers may override this method in a subclass to take specific actions at the beginning of a document (such as allocating the root node of a tree or creating an output file).


exception:
  org.xml.sax.SAXException - Any SAX exception, possiblywrapping another exception.
See Also:   org.xml.sax.ContentHandler.startDocument



startElement
public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException(Code)
Receive notification of the start of an element.

By default, do nothing. Application writers may override this method in a subclass to take specific actions at the start of each element (such as allocating a new tree node or writing output to a file).


Parameters:
  uri - The Namespace URI, or the empty string if theelement has no Namespace URI or if Namespaceprocessing is not being performed.
Parameters:
  localName - The local name (without prefix), or theempty string if Namespace processing is not beingperformed.
Parameters:
  qName - The qualified name (with prefix), or theempty string if qualified names are not available.
Parameters:
  atts - The attributes attached to the element. Ifthere are no attributes, it shall be an emptyAttributes object.
exception:
  org.xml.sax.SAXException - Any SAX exception, possiblywrapping another exception.
See Also:   org.xml.sax.ContentHandler.startElement



startPrefixMapping
public void startPrefixMapping(String prefix, String uri) throws SAXException(Code)
Receive notification of the start of a Namespace mapping.

By default, do nothing. Application writers may override this method in a subclass to take specific actions at the start of each Namespace prefix scope (such as storing the prefix mapping).


Parameters:
  prefix - The Namespace prefix being declared.
Parameters:
  uri - The Namespace URI mapped to the prefix.
exception:
  org.xml.sax.SAXException - Any SAX exception, possiblywrapping another exception.
See Also:   org.xml.sax.ContentHandler.startPrefixMapping



unparsedEntityDecl
public void unparsedEntityDecl(String name, String publicId, String systemId, String notationName) throws SAXException(Code)
Receive notification of an unparsed entity declaration.

By default, do nothing. Application writers may override this method in a subclass to keep track of the unparsed entities declared in a document.


Parameters:
  name - The entity name.
Parameters:
  publicId - The entity public identifier, or null if notavailable.
Parameters:
  systemId - The entity system identifier.
Parameters:
  notationName - The name of the associated notation.
exception:
  org.xml.sax.SAXException - Any SAX exception, possiblywrapping another exception.
See Also:   org.xml.sax.DTDHandler.unparsedEntityDecl



warning
public void warning(SAXParseException e) throws SAXException(Code)
Receive notification of a parser warning.

The default implementation does nothing. Application writers may override this method in a subclass to take specific actions for each warning, such as inserting the message in a log file or printing it to the console.


Parameters:
  e - The warning information encoded as an exception.
exception:
  org.xml.sax.SAXException - Any SAX exception, possiblywrapping another exception.
See Also:   org.xml.sax.ErrorHandler.warning
See Also:   org.xml.sax.SAXParseException



Methods inherited from java.lang.Object
native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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