DefaultHandlerpublic class DefaultHandler extends Object implements ErrorHandler, EntityResolver, DTDHandler, ContentHandlerDefault 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:
- {@link org.xml.sax.EntityResolver EntityResolver}
- {@link org.xml.sax.DTDHandler DTDHandler}
- {@link org.xml.sax.ContentHandler ContentHandler}
- {@link org.xml.sax.ErrorHandler ErrorHandler}
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
{@link org.xml.sax.HandlerBase HandlerBase} class. |
| Methods Summary |
|---|
| public void | characters(char[] ch, int start, int length)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).
// no op
| | public void | endDocument()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).
// no op
| | public void | endElement(java.lang.String uri, java.lang.String localName, java.lang.String qName)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).
// no op
| | public void | endPrefixMapping(java.lang.String prefix)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.
// no op
| | public void | error(org.xml.sax.SAXParseException e)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.
// no op
| | public void | fatalError(org.xml.sax.SAXParseException e)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.
throw e;
| | public void | ignorableWhitespace(char[] ch, int start, int length)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).
// no op
| | public void | notationDecl(java.lang.String name, java.lang.String publicId, java.lang.String systemId)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.
// no op
| | public void | processingInstruction(java.lang.String target, java.lang.String data)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.
// no op
| | public org.xml.sax.InputSource | resolveEntity(java.lang.String publicId, java.lang.String systemId)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.
return null;
| | public void | setDocumentLocator(org.xml.sax.Locator locator)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.
// no op
| | public void | skippedEntity(java.lang.String name)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.
// no op
| | public void | startDocument()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).
// no op
| | public void | startElement(java.lang.String uri, java.lang.String localName, java.lang.String qName, org.xml.sax.Attributes attributes)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).
// no op
| | public void | startPrefixMapping(java.lang.String prefix, java.lang.String uri)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).
// no op
| | public void | unparsedEntityDecl(java.lang.String name, java.lang.String publicId, java.lang.String systemId, java.lang.String notationName)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.
// no op
| | public void | warning(org.xml.sax.SAXParseException e)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.
// no op
|
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