HandlerBase

See also:

• EntityResolver
• DTDHandler
• DocumentHandler
• ErrorHandler

HandlerBase

public HandlerBase ()

characters

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).

endDocument

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

endElement

public void endElement (String name)

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).

error

public void error (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.

fatalError

public void fatalError (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.

ignorableWhitespace

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).

notationDecl

public void notationDecl (String name, 
                String publicId, 
                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.

processingInstruction

public void processingInstruction (String target, 
                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.

resolveEntity

public InputSource resolveEntity (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. 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.

setDocumentLocator

public void setDocumentLocator (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.

startDocument

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).

startElement

public void startElement (String name, 
                AttributeList 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).

unparsedEntityDecl

public void unparsedEntityDecl (String name, 
                String publicId, 
                String systemId, 
                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.

warning

public void warning (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.