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java.lang.Object | +----org.xml.sax.HandlerBase
This class implements the default behaviour for four SAX interfaces: EntityResolver, DTDHandler, DocumentHandler, and 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.
Note that the use of this class is optional.
HandlerBase()
characters(char[], int, int)
endDocument()
endElement(String)
error(SAXParseException)
fatalError(SAXParseException)
ignorableWhitespace(char[], int, int)
notationDecl(String, String, String)
processingInstruction(String, String)
resolveEntity(String, String)
setDocumentLocator(Locator)
startDocument()
startElement(String, AttributeList)
unparsedEntityDecl(String, String, String, String)
warning(SAXParseException)
HandlerBase
public HandlerBase()
resolveEntity
public InputSource resolveEntity(String publicId,
String systemId) throws SAXException
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.
notationDecl
public void notationDecl(String name,
String publicId,
String systemId)
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.
unparsedEntityDecl
public void unparsedEntityDecl(String name,
String publicId,
String systemId,
String notationName)
By default, do nothing. Application writers may override this method in a subclass to keep track of the unparsed entities declared in a document.
setDocumentLocator
public void setDocumentLocator(Locator locator)
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() throws SAXException
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).
endDocument
public void endDocument() throws SAXException
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).
startElement
public void startElement(String name,
AttributeList attributes) throws SAXException
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).
endElement
public void endElement(String name) throws SAXException
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).
characters
public void characters(char ch[],
int start,
int length) throws SAXException
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).
ignorableWhitespace
public void ignorableWhitespace(char ch[],
int start,
int length) throws SAXException
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).
processingInstruction
public void processingInstruction(String target,
String data) throws SAXException
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.
warning
public void warning(SAXParseException e) throws SAXException
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.
error
public void error(SAXParseException e) throws SAXException
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) throws SAXException
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.
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