- java.lang.Object
- 
- org.xml.sax.helpers.DefaultHandler
 
- 
- All Implemented Interfaces:
- ContentHandler,- DTDHandler,- EntityResolver,- ErrorHandler
 - Direct Known Subclasses:
- DefaultHandler2
 
 public class DefaultHandler extends Object implements EntityResolver, DTDHandler, ContentHandler, ErrorHandler Default 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: 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 HandlerBaseclass.- Since:
- 1.4, SAX 2.0
- See Also:
- EntityResolver,- DTDHandler,- ContentHandler,- ErrorHandler
 
- 
- 
Constructor SummaryConstructors Constructor Description DefaultHandler()
 - 
Method SummaryAll Methods Instance Methods Concrete Methods Modifier and Type Method Description voidcharacters(char[] ch, int start, int length)Receive notification of character data inside an element.voidendDocument()Receive notification of the end of the document.voidendElement(String uri, String localName, String qName)Receive notification of the end of an element.voidendPrefixMapping(String prefix)Receive notification of the end of a Namespace mapping.voiderror(SAXParseException e)Receive notification of a recoverable parser error.voidfatalError(SAXParseException e)Report a fatal XML parsing error.voidignorableWhitespace(char[] ch, int start, int length)Receive notification of ignorable whitespace in element content.voidnotationDecl(String name, String publicId, String systemId)Receive notification of a notation declaration.voidprocessingInstruction(String target, String data)Receive notification of a processing instruction.InputSourceresolveEntity(String publicId, String systemId)Resolve an external entity.voidsetDocumentLocator(Locator locator)Receive a Locator object for document events.voidskippedEntity(String name)Receive notification of a skipped entity.voidstartDocument()Receive notification of the beginning of the document.voidstartElement(String uri, String localName, String qName, Attributes attributes)Receive notification of the start of an element.voidstartPrefixMapping(String prefix, String uri)Receive notification of the start of a Namespace mapping.voidunparsedEntityDecl(String name, String publicId, String systemId, String notationName)Receive notification of an unparsed entity declaration.voidwarning(SAXParseException e)Receive notification of a parser warning.
 
- 
- 
- 
Method Detail- 
resolveEntitypublic InputSource resolveEntity(String publicId, String systemId) throws IOException, SAXException 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:
- resolveEntityin interface- EntityResolver
- Parameters:
- publicId- The public identifier, 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:
- IOException- If there is an error setting up the new input source.
- SAXException- Any SAX exception, possibly wrapping another exception.
- See Also:
- EntityResolver.resolveEntity(java.lang.String, java.lang.String)
 
 - 
notationDeclpublic void notationDecl(String name, String publicId, String systemId) throws SAXException 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:
- notationDeclin interface- DTDHandler
- Parameters:
- name- The notation name.
- publicId- The notation public identifier, or null if not available.
- systemId- The notation system identifier.
- Throws:
- SAXException- Any SAX exception, possibly wrapping another exception.
- See Also:
- DTDHandler.notationDecl(java.lang.String, java.lang.String, java.lang.String)
 
 - 
unparsedEntityDeclpublic void unparsedEntityDecl(String name, String publicId, String systemId, String notationName) throws SAXException 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:
- unparsedEntityDeclin interface- DTDHandler
- 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.
- Throws:
- SAXException- Any SAX exception, possibly wrapping another exception.
- See Also:
- DTDHandler.unparsedEntityDecl(java.lang.String, java.lang.String, java.lang.String, java.lang.String)
 
 - 
setDocumentLocatorpublic 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. - Specified by:
- setDocumentLocatorin interface- ContentHandler
- Parameters:
- locator- A locator for all SAX document events.
- See Also:
- ContentHandler.setDocumentLocator(org.xml.sax.Locator),- Locator
 
 - 
startDocumentpublic void startDocument() throws SAXExceptionReceive 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:
- startDocumentin interface- ContentHandler
- Throws:
- SAXException- Any SAX exception, possibly wrapping another exception.
- See Also:
- ContentHandler.startDocument()
 
 - 
endDocumentpublic void endDocument() throws SAXExceptionReceive 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). - Specified by:
- endDocumentin interface- ContentHandler
- Throws:
- SAXException- Any SAX exception, possibly wrapping another exception.
- See Also:
- ContentHandler.endDocument()
 
 - 
startPrefixMappingpublic void startPrefixMapping(String prefix, String uri) throws SAXException 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). - Specified by:
- startPrefixMappingin interface- ContentHandler
- Parameters:
- prefix- The Namespace prefix being declared.
- uri- The Namespace URI mapped to the prefix.
- Throws:
- SAXException- Any SAX exception, possibly wrapping another exception.
- See Also:
- ContentHandler.startPrefixMapping(java.lang.String, java.lang.String)
 
 - 
endPrefixMappingpublic void endPrefixMapping(String prefix) throws SAXException 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. - Specified by:
- endPrefixMappingin interface- ContentHandler
- Parameters:
- prefix- The Namespace prefix being declared.
- Throws:
- SAXException- Any SAX exception, possibly wrapping another exception.
- See Also:
- ContentHandler.endPrefixMapping(java.lang.String)
 
 - 
startElementpublic void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException 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:
- startElementin interface- ContentHandler
- Parameters:
- uri- The Namespace URI, or the empty string if the element has no Namespace URI or if Namespace processing is not being performed.
- localName- The local name (without prefix), or the empty string if Namespace processing is not being performed.
- qName- The qualified name (with prefix), or the empty string if qualified names are not available.
- attributes- The attributes attached to the element. If there are no attributes, it shall be an empty Attributes object.
- Throws:
- SAXException- Any SAX exception, possibly wrapping another exception.
- See Also:
- ContentHandler.startElement(java.lang.String, java.lang.String, java.lang.String, org.xml.sax.Attributes)
 
 - 
endElementpublic void endElement(String uri, String localName, String qName) throws SAXException 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:
- endElementin interface- ContentHandler
- Parameters:
- uri- The Namespace URI, or the empty string if the element has no Namespace URI or if Namespace processing is not being performed.
- localName- The local name (without prefix), or the empty string if Namespace processing is not being performed.
- qName- The qualified name (with prefix), or the empty string if qualified names are not available.
- Throws:
- SAXException- Any SAX exception, possibly wrapping another exception.
- See Also:
- ContentHandler.endElement(java.lang.String, java.lang.String, java.lang.String)
 
 - 
characterspublic void characters(char[] ch, int start, int length) throws SAXExceptionReceive 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:
- charactersin interface- ContentHandler
- 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:
- ContentHandler.characters(char[], int, int)
 
 - 
ignorableWhitespacepublic void ignorableWhitespace(char[] ch, int start, int length) throws SAXExceptionReceive 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:
- ignorableWhitespacein interface- ContentHandler
- 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:
- ContentHandler.ignorableWhitespace(char[], int, int)
 
 - 
processingInstructionpublic void processingInstruction(String target, String data) throws SAXException 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:
- processingInstructionin interface- ContentHandler
- 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:
- ContentHandler.processingInstruction(java.lang.String, java.lang.String)
 
 - 
skippedEntitypublic void skippedEntity(String name) throws SAXException 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. - Specified by:
- skippedEntityin interface- ContentHandler
- Parameters:
- name- The name of the skipped entity.
- Throws:
- SAXException- Any SAX exception, possibly wrapping another exception.
- See Also:
- ContentHandler.processingInstruction(java.lang.String, java.lang.String)
 
 - 
warningpublic void warning(SAXParseException e) throws SAXException 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:
- warningin interface- ErrorHandler
- 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
 
 - 
errorpublic void error(SAXParseException e) throws SAXException 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:
- errorin interface- ErrorHandler
- Parameters:
- e- The error information encoded as an exception.
- Throws:
- SAXException- Any SAX exception, possibly wrapping another exception.
- See Also:
- ErrorHandler.warning(org.xml.sax.SAXParseException),- SAXParseException
 
 - 
fatalErrorpublic void fatalError(SAXParseException e) throws SAXException 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:
- fatalErrorin interface- ErrorHandler
- 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
 
 
- 
 
-