org.xml.sax.helpers.XMLFilterImpl

All Implemented Interfaces:: ContentHandler, DTDHandler, EntityResolver, ErrorHandler, XMLFilter, XMLReader

public class XMLFilterImpl
extends Object
implements XMLFilter, EntityResolver, DTDHandler, ContentHandler, ErrorHandler

Base class for deriving an XML filter.

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 designed to sit between an XMLReader and the client application's event handlers. By default, it does nothing but pass requests up to the reader and events on to the handlers unmodified, but subclasses can override specific methods to modify the event stream or the configuration requests as they pass through.

Since:: 1.4, SAX 2.0
See Also:: XMLFilter, XMLReader, EntityResolver, DTDHandler, ContentHandler, ErrorHandler

Constructor Summary

Constructors
Constructor	Description
`XMLFilterImpl()`	Construct an empty XML filter, with no parent.
`XMLFilterImpl(XMLReader parent)`	Construct an XML filter with the specified parent.

Method Summary

Modifier and Type	Method	Description
`void`	`characters(char[] ch, int start, int length)`	Filter a character data event.
`void`	`endDocument()`	Filter an end document event.
`void`	`endElement(String uri, String localName, String qName)`	Filter an end element event.
`void`	`endPrefixMapping(String prefix)`	Filter an end Namespace prefix mapping event.
`void`	`error(SAXParseException e)`	Filter an error event.
`void`	`fatalError(SAXParseException e)`	Filter a fatal error event.
`ContentHandler`	`getContentHandler()`	Get the content event handler.
`DTDHandler`	`getDTDHandler()`	Get the current DTD event handler.
`EntityResolver`	`getEntityResolver()`	Get the current entity resolver.
`ErrorHandler`	`getErrorHandler()`	Get the current error event handler.
`boolean`	`getFeature(String name)`	Look up the value of a feature.
`XMLReader`	`getParent()`	Get the parent reader.
`Object`	`getProperty(String name)`	Look up the value of a property.
`void`	`ignorableWhitespace(char[] ch, int start, int length)`	Filter an ignorable whitespace event.
`void`	`notationDecl(String name, String publicId, String systemId)`	Filter a notation declaration event.
`void`	`parse(String systemId)`	Parse a document.
`void`	`parse(InputSource input)`	Parse a document.
`void`	`processingInstruction(String target, String data)`	Filter a processing instruction event.
`InputSource`	`resolveEntity(String publicId, String systemId)`	Filter an external entity resolution.
`void`	`setContentHandler(ContentHandler handler)`	Set the content event handler.
`void`	`setDocumentLocator(Locator locator)`	Filter a new document locator event.
`void`	`setDTDHandler(DTDHandler handler)`	Set the DTD event handler.
`void`	`setEntityResolver(EntityResolver resolver)`	Set the entity resolver.
`void`	`setErrorHandler(ErrorHandler handler)`	Set the error event handler.
`void`	`setFeature(String name, boolean value)`	Set the value of a feature.
`void`	`setParent(XMLReader parent)`	Set the parent reader.
`void`	`setProperty(String name, Object value)`	Set the value of a property.
`void`	`skippedEntity(String name)`	Filter a skipped entity event.
`void`	`startDocument()`	Filter a start document event.
`void`	`startElement(String uri, String localName, String qName, Attributes atts)`	Filter a start element event.
`void`	`startPrefixMapping(String prefix, String uri)`	Filter a start Namespace prefix mapping event.
`void`	`unparsedEntityDecl(String name, String publicId, String systemId, String notationName)`	Filter an unparsed entity declaration event.
`void`	`warning(SAXParseException e)`	Filter a warning event.

Methods declared in class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details
- XMLFilterImpl
  
  public XMLFilterImpl()
  
  Construct an empty XML filter, with no parent.
  This filter will have no parent: you must assign a parent before you start a parse or do any configuration with setFeature or setProperty, unless you use this as a pure event consumer rather than as an XMLReader.
  
  See Also:
  
  XMLReader.setFeature(java.lang.String, boolean), XMLReader.setProperty(java.lang.String, java.lang.Object), setParent(org.xml.sax.XMLReader)
- XMLFilterImpl
  
  public XMLFilterImpl(XMLReader parent)
  
  Construct an XML filter with the specified parent.
  
  See Also:
  
  setParent(org.xml.sax.XMLReader), getParent()
Method Details
- setParent
  
  public void setParent(XMLReader parent)
  
  Set the parent reader.
  This is the XMLReader from which this filter will obtain its events and to which it will pass its configuration requests. The parent may itself be another filter.
  
  If there is no parent reader set, any attempt to parse or to set or get a feature or property will fail.
  
  Specified by:
  
  setParent in interface XMLFilter
  
  Parameters:
  
  parent - The parent XML reader.
  
  See Also:
  
  getParent()
- getParent
  
  public XMLReader getParent()
  
  Get the parent reader.
  
  Specified by:
  
  getParent in interface XMLFilter
  
  Returns:
  
  The parent XML reader, or null if none is set.
  
  See Also:
  
  setParent(org.xml.sax.XMLReader)
- setFeature
  
  public void setFeature(String name, boolean value) throws SAXNotRecognizedException, SAXNotSupportedException
  
  Set the value of a feature.
  This will always fail if the parent is null.
  
  Specified by:
  
  setFeature in interface XMLReader
  
  Parameters:
  
  name - The feature name.
  
  value - The requested feature value.
  
  Throws:
  
  SAXNotRecognizedException - If the feature value can't be assigned or retrieved from the parent.
  
  SAXNotSupportedException - When the parent recognizes the feature name but cannot set the requested value.
  
  See Also:
  
  XMLReader.getFeature(java.lang.String)
- getFeature
  
  public boolean getFeature(String name) throws SAXNotRecognizedException, SAXNotSupportedException
  
  Look up the value of a feature.
  This will always fail if the parent is null.
  
  Specified by:
  
  getFeature in interface XMLReader
  
  Parameters:
  
  name - The feature name.
  
  Returns:
  
  The current value of the feature.
  
  Throws:
  
  SAXNotRecognizedException - If the feature value can't be assigned or retrieved from the parent.
  
  SAXNotSupportedException - When the parent recognizes the feature name but cannot determine its value at this time.
  
  See Also:
  
  XMLReader.setFeature(java.lang.String, boolean)
- setProperty
  
  public void setProperty(String name, Object value) throws SAXNotRecognizedException, SAXNotSupportedException
  
  Set the value of a property.
  This will always fail if the parent is null.
  
  Specified by:
  
  setProperty in interface XMLReader
  
  Parameters:
  
  name - The property name.
  
  value - The requested property value.
  
  Throws:
  
  SAXNotRecognizedException - If the property value can't be assigned or retrieved from the parent.
  
  SAXNotSupportedException - When the parent recognizes the property name but cannot set the requested value.
- getProperty
  
  public Object getProperty(String name) throws SAXNotRecognizedException, SAXNotSupportedException
  
  Look up the value of a property.
  
  Specified by:
  
  getProperty in interface XMLReader
  
  Parameters:
  
  name - The property name.
  
  Returns:
  
  The current value of the property.
  
  Throws:
  
  SAXNotRecognizedException - If the property value can't be assigned or retrieved from the parent.
  
  SAXNotSupportedException - When the parent recognizes the property name but cannot determine its value at this time.
  
  See Also:
  
  XMLReader.setProperty(java.lang.String, java.lang.Object)
- setEntityResolver
  
  public void setEntityResolver(EntityResolver resolver)
  
  Set the entity resolver.
  
  Specified by:
  
  setEntityResolver in interface XMLReader
  
  Parameters:
  
  resolver - The new entity resolver.
  
  See Also:
  
  XMLReader.getEntityResolver()
- getEntityResolver
  
  public EntityResolver getEntityResolver()
  
  Get the current entity resolver.
  
  Specified by:
  
  getEntityResolver in interface XMLReader
  
  Returns:
  
  The current entity resolver, or null if none was set.
  
  See Also:
  
  XMLReader.setEntityResolver(org.xml.sax.EntityResolver)
- setDTDHandler
  
  public void setDTDHandler(DTDHandler handler)
  
  Set the DTD event handler.
  
  Specified by:
  
  setDTDHandler in interface XMLReader
  
  Parameters:
  
  handler - the new DTD handler
  
  See Also:
  
  XMLReader.getDTDHandler()
- getDTDHandler
  
  public DTDHandler getDTDHandler()
  
  Get the current DTD event handler.
  
  Specified by:
  
  getDTDHandler in interface XMLReader
  
  Returns:
  
  The current DTD handler, or null if none was set.
  
  See Also:
  
  XMLReader.setDTDHandler(org.xml.sax.DTDHandler)
- setContentHandler
  
  public void setContentHandler(ContentHandler handler)
  
  Set the content event handler.
  
  Specified by:
  
  setContentHandler in interface XMLReader
  
  Parameters:
  
  handler - the new content handler
  
  See Also:
  
  XMLReader.getContentHandler()
- getContentHandler
  
  public ContentHandler getContentHandler()
  
  Get the content event handler.
  
  Specified by:
  
  getContentHandler in interface XMLReader
  
  Returns:
  
  The current content handler, or null if none was set.
  
  See Also:
  
  XMLReader.setContentHandler(org.xml.sax.ContentHandler)
- setErrorHandler
  
  public void setErrorHandler(ErrorHandler handler)
  
  Set the error event handler.
  
  Specified by:
  
  setErrorHandler in interface XMLReader
  
  Parameters:
  
  handler - the new error handler
  
  See Also:
  
  XMLReader.getErrorHandler()
- getErrorHandler
  
  public ErrorHandler getErrorHandler()
  
  Get the current error event handler.
  
  Specified by:
  
  getErrorHandler in interface XMLReader
  
  Returns:
  
  The current error handler, or null if none was set.
  
  See Also:
  
  XMLReader.setErrorHandler(org.xml.sax.ErrorHandler)
- parse
  
  public void parse(InputSource input) throws SAXException, IOException
  
  Parse a document.
  
  Specified by:
  
  parse in interface XMLReader
  
  Parameters:
  
  input - The input source for the document entity.
  
  Throws:
  
  SAXException - Any SAX exception, possibly wrapping another exception.
  
  IOException - An IO exception from the parser, possibly from a byte stream or character stream supplied by the application.
  
  See Also:
  
  InputSource, XMLReader.parse(java.lang.String), XMLReader.setEntityResolver(org.xml.sax.EntityResolver), XMLReader.setDTDHandler(org.xml.sax.DTDHandler), XMLReader.setContentHandler(org.xml.sax.ContentHandler), XMLReader.setErrorHandler(org.xml.sax.ErrorHandler)
- parse
  
  public void parse(String systemId) throws SAXException, IOException
  
  Parse a document.
  
  Specified by:
  
  parse in interface XMLReader
  
  Parameters:
  
  systemId - The system identifier as a fully-qualified URI.
  
  Throws:
  
  SAXException - Any SAX exception, possibly wrapping another exception.
  
  IOException - An IO exception from the parser, possibly from a byte stream or character stream supplied by the application.
  
  See Also:
  
  XMLReader.parse(org.xml.sax.InputSource)
- resolveEntity
  
  public InputSource resolveEntity(String publicId, String systemId) throws SAXException, IOException
  
  Filter an external entity resolution.
  
  Specified by:
  
  resolveEntity in interface EntityResolver
  
  Parameters:
  
  publicId - The entity's public identifier, or null.
  
  systemId - The entity's system identifier.
  
  Returns:
  
  A new InputSource or null for the default.
  
  Throws:
  
  SAXException - The client may throw an exception during processing.
  
  IOException - The client may throw an I/O-related exception while obtaining the new InputSource.
  
  See Also:
  
  InputSource
- notationDecl
  
  public void notationDecl(String name, String publicId, String systemId) throws SAXException
  
  Filter a notation declaration event.
  
  Specified by:
  
  notationDecl in interface DTDHandler
  
  Parameters:
  
  name - The notation name.
  
  publicId - The notation's public identifier, or null.
  
  systemId - The notation's system identifier, or null.
  
  Throws:
  
  SAXException - The client may throw an exception during processing.
  
  See Also:
  
  DTDHandler.unparsedEntityDecl(java.lang.String, java.lang.String, java.lang.String, java.lang.String), Attributes
- unparsedEntityDecl
  
  public void unparsedEntityDecl(String name, String publicId, String systemId, String notationName) throws SAXException
  
  Filter an unparsed entity declaration event.
  
  Specified by:
  
  unparsedEntityDecl in interface DTDHandler
  
  Parameters:
  
  name - The entity name.
  
  publicId - The entity's public identifier, or null.
  
  systemId - The entity's system identifier, or null.
  
  notationName - The name of the associated notation.
  
  Throws:
  
  SAXException - The client may throw an exception during processing.
  
  See Also:
  
  DTDHandler.notationDecl(java.lang.String, java.lang.String, java.lang.String), Attributes
- setDocumentLocator
  
  public void setDocumentLocator(Locator locator)
  
  Filter a new document locator event.
  
  Specified by:
  
  setDocumentLocator in interface ContentHandler
  
  Parameters:
  
  locator - The document locator.
  
  See Also:
  
  Locator
- startDocument
  
  public void startDocument() throws SAXException
  
  Filter a start document event.
  
  Specified by:
  
  startDocument in interface ContentHandler
  
  Throws:
  
  SAXException - The client may throw an exception during processing.
  
  See Also:
  
  ContentHandler.endDocument()
- endDocument
  
  public void endDocument() throws SAXException
  
  Filter an end document event.
  
  Specified by:
  
  endDocument in interface ContentHandler
  
  Throws:
  
  SAXException - The client may throw an exception during processing.
  
  See Also:
  
  ContentHandler.startDocument()
- startPrefixMapping
  
  public void startPrefixMapping(String prefix, String uri) throws SAXException
  
  Filter a start Namespace prefix mapping event.
  
  Specified by:
  
  startPrefixMapping in interface ContentHandler
  
  Parameters:
  
  prefix - The Namespace prefix.
  
  uri - The Namespace URI.
  
  Throws:
  
  SAXException - The client may throw an exception during processing.
  
  See Also:
  
  ContentHandler.endPrefixMapping(java.lang.String), ContentHandler.startElement(java.lang.String, java.lang.String, java.lang.String, org.xml.sax.Attributes)
- endPrefixMapping
  
  public void endPrefixMapping(String prefix) throws SAXException
  
  Filter an end Namespace prefix mapping event.
  
  Specified by:
  
  endPrefixMapping in interface ContentHandler
  
  Parameters:
  
  prefix - The Namespace prefix.
  
  Throws:
  
  SAXException - The client may throw an exception during processing.
  
  See Also:
  
  ContentHandler.startPrefixMapping(java.lang.String, java.lang.String), ContentHandler.endElement(java.lang.String, java.lang.String, java.lang.String)
- startElement
  
  public void startElement(String uri, String localName, String qName, Attributes atts) throws SAXException
  
  Filter a start element event.
  
  Specified by:
  
  startElement in interface ContentHandler
  
  Parameters:
  
  uri - The element's Namespace URI, or the empty string.
  
  localName - The element's local name, or the empty string.
  
  qName - The element's qualified (prefixed) name, or the empty string.
  
  atts - The element's attributes.
  
  Throws:
  
  SAXException - The client may throw an exception during processing.
  
  See Also:
  
  ContentHandler.endElement(java.lang.String, java.lang.String, java.lang.String), Attributes, AttributesImpl
- endElement
  
  public void endElement(String uri, String localName, String qName) throws SAXException
  
  Filter an end element event.
  
  Specified by:
  
  endElement in interface ContentHandler
  
  Parameters:
  
  uri - The element's Namespace URI, or the empty string.
  
  localName - The element's local name, or the empty string.
  
  qName - The element's qualified (prefixed) name, or the empty string.
  
  Throws:
  
  SAXException - The client may throw an exception during processing.
- characters
  
  public void characters(char[] ch, int start, int length) throws SAXException
  
  Filter a character data event.
  
  Specified by:
  
  characters in interface ContentHandler
  
  Parameters:
  
  ch - An array of characters.
  
  start - The starting position in the array.
  
  length - The number of characters to use from the array.
  
  Throws:
  
  SAXException - The client may throw an exception during processing.
  
  See Also:
  
  ContentHandler.ignorableWhitespace(char[], int, int), Locator
- ignorableWhitespace
  
  public void ignorableWhitespace(char[] ch, int start, int length) throws SAXException
  
  Filter an ignorable whitespace event.
  
  Specified by:
  
  ignorableWhitespace in interface ContentHandler
  
  Parameters:
  
  ch - An array of characters.
  
  start - The starting position in the array.
  
  length - The number of characters to use from the array.
  
  Throws:
  
  SAXException - The client may throw an exception during processing.
  
  See Also:
  
  ContentHandler.characters(char[], int, int)
- processingInstruction
  
  public void processingInstruction(String target, String data) throws SAXException
  
  Filter a processing instruction event.
  
  Specified by:
  
  processingInstruction in interface ContentHandler
  
  Parameters:
  
  target - The processing instruction target.
  
  data - The text following the target.
  
  Throws:
  
  SAXException - The client may throw an exception during processing.
- skippedEntity
  
  public void skippedEntity(String name) throws SAXException
  
  Filter a skipped entity event.
  
  Specified by:
  
  skippedEntity in interface ContentHandler
  
  Parameters:
  
  name - The name of the skipped entity.
  
  Throws:
  
  SAXException - The client may throw an exception during processing.
- warning
  
  public void warning(SAXParseException e) throws SAXException
  
  Filter a warning event.
  
  Specified by:
  
  warning in interface ErrorHandler
  
  Parameters:
  
  e - The warning as an exception.
  
  Throws:
  
  SAXException - The client may throw an exception during processing.
  
  See Also:
  
  SAXParseException
- error
  
  public void error(SAXParseException e) throws SAXException
  
  Filter an error event.
  
  Specified by:
  
  error in interface ErrorHandler
  
  Parameters:
  
  e - The error as an exception.
  
  Throws:
  
  SAXException - The client may throw an exception during processing.
  
  See Also:
  
  SAXParseException
- fatalError
  
  public void fatalError(SAXParseException e) throws SAXException
  
  Filter a fatal error event.
  
  Specified by:
  
  fatalError in interface ErrorHandler
  
  Parameters:
  
  e - The error as an exception.
  
  Throws:
  
  SAXException - The client may throw an exception during processing.
  
  See Also:
  
  SAXParseException

Class XMLFilterImpl

Constructor Summary

Method Summary

Methods declared in class java.lang.Object

Constructor Details

Method Details