Java Doc for DefaultHandler.java in  » XML » Piccolo » org » xml » sax » helpers » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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:

• org.xml.sax.EntityResolver EntityResolver
• org.xml.sax.DTDHandler DTDHandler
• org.xml.sax.ContentHandler ContentHandler
• 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 org.xml.sax.HandlerBase HandlerBase class.

By default, do nothing.

By default, do nothing.

By default, do nothing.

By default, do nothing.

The default implementation does nothing.

By default, do nothing.

By default, do nothing.

By default, do nothing.

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

By default, do nothing.

By default, do nothing.

By default, do nothing.

By default, do nothing.

By default, do nothing.

By default, do nothing.

The default implementation does nothing.

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).

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).

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).

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

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.

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.

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).

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.

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.

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.

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.

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.

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).

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).

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).

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

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.