Java Module java.xml Package org.xml.sax.helpers Class DefaultHandler（JDK11）

Constructor Detail

• DefaultHandler

  public DefaultHandler()

Method Detail

• resolveEntity

  public 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:

  resolveEntity in 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)

• notationDecl

  public 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:

  notationDecl in 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)

• unparsedEntityDecl

  public 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:

  unparsedEntityDecl in 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)

• 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.

  Specified by:

  setDocumentLocator in interface ContentHandler

  Parameters:

  locator - A locator for all SAX document events.

  See Also:

  ContentHandler.setDocumentLocator(org.xml.sax.Locator), Locator

• startDocument

  public void startDocument()
                     throws SAXException

  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).

  Specified by:

  startDocument in interface ContentHandler

  Throws:

  SAXException - Any SAX exception, possibly wrapping another exception.

  See Also:

  ContentHandler.startDocument()

• endDocument

  public void endDocument()
                   throws SAXException

  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).

  Specified by:

  endDocument in interface ContentHandler

  Throws:

  SAXException - Any SAX exception, possibly wrapping another exception.

  See Also:

  ContentHandler.endDocument()

• startPrefixMapping

  public 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:

  startPrefixMapping in 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)

• endPrefixMapping

  public 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:

  endPrefixMapping in 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)

• startElement

  public 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:

  startElement in 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)

• endElement

  public 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:

  endElement in 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)

• characters

  public void characters​(char[] ch,
                         int start,
                         int length)
                  throws SAXException

  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).

  Specified by:

  characters in 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)

• ignorableWhitespace

  public void ignorableWhitespace​(char[] ch,
                                  int start,
                                  int length)
                           throws SAXException

  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).

  Specified by:

  ignorableWhitespace in 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)

• processingInstruction

  public 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:

  processingInstruction in 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)

• skippedEntity

  public 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:

  skippedEntity in 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)

• warning

  public 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:

  warning in 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

• error

  public 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:

  error in 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

• fatalError

  public 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:

  fatalError in 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