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Class HandlerBase

java.lang.Object  |  +--org.xml.sax.HandlerBase

All Implemented Interfaces:

DocumentHandler,DTDHandler,EntityResolver,ErrorHandler

public classHandlerBase

extends java.lang.Object

implementsEntityResolver,DTDHandler,DocumentHandler,ErrorHandler

Default base class for handlers.

This module, both source code and documentation, is in the Public Domain, and comes withNO WARRANTY.

This class implements the default behaviour for four SAX1 interfaces: EntityResolver, DTDHandler, DocumentHandler, and ErrorHandler. It is now obsolete, but is included in SAX2 to support legacy SAX1 applications. SAX2 applications should use theDefaultHandler class instead.

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.

Note that the use of this class is optional.

Since:

SAX 1.0

See Also:

EntityResolver,DTDHandler,DocumentHandler,ErrorHandler

HandlerBase

publicHandlerBase()

Deprecated. 

resolveEntity

publicInputSourceresolveEntity(java.lang.String publicId,                                 java.lang.String systemId)                          throwsSAXException

Deprecated. 

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.

Specified by:

resolveEntity in interfaceEntityResolver

Parameters:

publicId - The public identifer, or null if none is available.

systemId - The system identifier provided in the XML document.

Returns:

The new input source, or null to require the default behaviour.

Throws:

SAXException - Any SAX exception, possibly wrapping another exception.

See Also:

EntityResolver.resolveEntity(java.lang.String, java.lang.String)

notationDecl

public voidnotationDecl(java.lang.String name,                         java.lang.String publicId,                         java.lang.String systemId)

Deprecated. 

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.

Specified by:

notationDecl in interfaceDTDHandler

Parameters:

name - The notation name.

publicId - The notation public identifier, or null if not available.

systemId - The notation system identifier.

See Also:

DTDHandler.notationDecl(java.lang.String, java.lang.String, java.lang.String)

unparsedEntityDecl

public voidunparsedEntityDecl(java.lang.String name,                               java.lang.String publicId,                               java.lang.String systemId,                               java.lang.String notationName)

Deprecated. 

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.

Specified by:

unparsedEntityDecl in interfaceDTDHandler

Parameters:

name - The entity name.

publicId - The entity public identifier, or null if not available.

systemId - The entity system identifier.

notationName - The name of the associated notation.

See Also:

DTDHandler.unparsedEntityDecl(java.lang.String, java.lang.String, java.lang.String, java.lang.String)

setDocumentLocator

public voidsetDocumentLocator(Locator locator)

Deprecated. 

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.

Specified by:

setDocumentLocator in interfaceDocumentHandler

Parameters:

locator - A locator for all SAX document events.

See Also:

DocumentHandler.setDocumentLocator(org.xml.sax.Locator),Locator

startDocument

public voidstartDocument()                   throwsSAXException

Deprecated. 

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).

Specified by:

startDocument in interfaceDocumentHandler

Throws:

SAXException - Any SAX exception, possibly wrapping another exception.

See Also:

DocumentHandler.startDocument()

endDocument

public voidendDocument()                 throwsSAXException

Deprecated. 

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 beginning of a document (such as finalising a tree or closing an output file).

Specified by:

endDocument in interfaceDocumentHandler

Throws:

SAXException - Any SAX exception, possibly wrapping another exception.

See Also:

DocumentHandler.endDocument()

startElement

public voidstartElement(java.lang.String name,AttributeList attributes)                  throwsSAXException

Deprecated. 

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).

Specified by:

startElement in interfaceDocumentHandler

Parameters:

name - The element type name.

attributes - The specified or defaulted attributes.

Throws:

SAXException - Any SAX exception, possibly wrapping another exception.

See Also:

DocumentHandler.startElement(java.lang.String, org.xml.sax.AttributeList)

endElement

public voidendElement(java.lang.String name)                throwsSAXException

Deprecated. 

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).

Specified by:

endElement in interfaceDocumentHandler

Parameters:

name - The element type name.

attributes - The specified or defaulted attributes.

Throws:

SAXException - Any SAX exception, possibly wrapping another exception.

See Also:

DocumentHandler.endElement(java.lang.String)

characters

public voidcharacters(char[] ch,                       int start,                       int length)                throwsSAXException

Deprecated. 

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).

Specified by:

characters in interfaceDocumentHandler

Parameters:

ch - The characters.

start - The start position in the character array.

length - The number of characters to use from the character array.

Throws:

SAXException - Any SAX exception, possibly wrapping another exception.

See Also:

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

ignorableWhitespace

public voidignorableWhitespace(char[] ch,                                int start,                                int length)                         throwsSAXException

Deprecated. 

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).

Specified by:

ignorableWhitespace in interfaceDocumentHandler

Parameters:

ch - The whitespace characters.

start - The start position in the character array.

length - The number of characters to use from the character array.

Throws:

SAXException - Any SAX exception, possibly wrapping another exception.

See Also:

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

processingInstruction

public voidprocessingInstruction(java.lang.String target,                                  java.lang.String data)                           throwsSAXException

Deprecated. 

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.

Specified by:

processingInstruction in interfaceDocumentHandler

Parameters:

target - The processing instruction target.

data - The processing instruction data, or null if none is supplied.

Throws:

SAXException - Any SAX exception, possibly wrapping another exception.

See Also:

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

warning

public voidwarning(SAXParseException e)             throwsSAXException

Deprecated. 

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.

Specified by:

warning in interfaceErrorHandler

Parameters:

e - The warning information encoded as an exception.

Throws:

SAXException - Any SAX exception, possibly wrapping another exception.

See Also:

ErrorHandler.warning(org.xml.sax.SAXParseException),SAXParseException

error

public voiderror(SAXParseException e)           throwsSAXException

Deprecated. 

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.

Specified by:

error in interfaceErrorHandler

Parameters:

e - The warning information encoded as an exception.

Throws:

SAXException - Any SAX exception, possibly wrapping another exception.

See Also:

ErrorHandler.warning(org.xml.sax.SAXParseException),SAXParseException

fatalError

public voidfatalError(SAXParseException e)                throwsSAXException

Deprecated. 

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.

Specified by:

fatalError in interfaceErrorHandler

Parameters:

e - The error information encoded as an exception.

Throws:

SAXException - Any SAX exception, possibly wrapping another exception.

See Also:

ErrorHandler.fatalError(org.xml.sax.SAXParseException),SAXParseException