## net.sf.saxon
Class IDFilter

    java.lang.Object
      org.xml.sax.helpers.XMLFilterImpl
          net.sf.saxon.IDFilter

All Implemented Interfaces:
  org.xml.sax.ContentHandler, org.xml.sax.DTDHandler, org.xml.sax.EntityResolver, org.xml.sax.ErrorHandler, org.xml.sax.XMLFilter, org.xml.sax.XMLReader

public class IDFilter
extends org.xml.sax.helpers.XMLFilterImpl

IDFilter is a SAX filter that extracts the subtree of a document rooted at the element with a given ID value. Namespace declarations outside this subtree are treated as if they were present on the identified element.

Constructor Summary
`IDFilter(java.lang.String id)`

Method Summary
`void` `characters(char[] chars, int start, int len)` Filter a character data event.
`void` `endElement(java.lang.String localName, java.lang.String uri, java.lang.String qname)` Filter an end element event.
`void` `endPrefixMapping(java.lang.String prefix)` Filter an end Namespace prefix mapping event.
`void` `ignorableWhitespace(char[] chars, int start, int len)` Filter an ignorable whitespace event.
`void` `processingInstruction(java.lang.String name, java.lang.String data)` Filter a processing instruction event.
`void` `startElement(java.lang.String localName, java.lang.String uri, java.lang.String qname, org.xml.sax.Attributes atts)` Filter a start element event.
`void` `startPrefixMapping(java.lang.String prefix, java.lang.String uri)` Filter a start Namespace prefix mapping event.

Methods inherited from class org.xml.sax.helpers.XMLFilterImpl
`endDocument, error, fatalError, getContentHandler, getDTDHandler, getEntityResolver, getErrorHandler, getFeature, getParent, getProperty, notationDecl, parse, parse, resolveEntity, setContentHandler, setDocumentLocator, setDTDHandler, setEntityResolver, setErrorHandler, setFeature, setParent, setProperty, skippedEntity, startDocument, unparsedEntityDecl, warning`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### IDFilter

    public IDFilter(java.lang.String id)

Method Detail

### startPrefixMapping

    public void startPrefixMapping(java.lang.String prefix,
                                   java.lang.String uri)
                            throws org.xml.sax.SAXException

  Description copied from class: `org.xml.sax.helpers.XMLFilterImpl`
  Filter a start Namespace prefix mapping event.

  Parameters:
    `prefix` - The Namespace prefix.
    `uri` - The Namespace URI.
  Throws:
    `org.xml.sax.SAXException` - The client may throw an exception during processing.
  See Also:
    `ContentHandler.startPrefixMapping(java.lang.String, java.lang.String)`

### endPrefixMapping

    public void endPrefixMapping(java.lang.String prefix)
                          throws org.xml.sax.SAXException

  Description copied from class: `org.xml.sax.helpers.XMLFilterImpl`
  Filter an end Namespace prefix mapping event.

  Parameters:
    `prefix` - The Namespace prefix.
  Throws:
    `org.xml.sax.SAXException` - The client may throw an exception during processing.
  See Also:
    `ContentHandler.endPrefixMapping(java.lang.String)`

### startElement

    public void startElement(java.lang.String localName,
                             java.lang.String uri,
                             java.lang.String qname,
                             org.xml.sax.Attributes atts)
                      throws org.xml.sax.SAXException

  Description copied from class: `org.xml.sax.helpers.XMLFilterImpl`
  Filter a start element event.

  Parameters:
    `localName` - The element's Namespace URI, or the empty string.
    `uri` - 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:
    `org.xml.sax.SAXException` - The client may throw an exception during processing.
  See Also:
    `ContentHandler.startElement(java.lang.String, java.lang.String, java.lang.String, org.xml.sax.Attributes)`

### endElement

    public void endElement(java.lang.String localName,
                           java.lang.String uri,
                           java.lang.String qname)
                    throws org.xml.sax.SAXException

  Description copied from class: `org.xml.sax.helpers.XMLFilterImpl`
  Filter an end element event.

  Parameters:
    `localName` - The element's Namespace URI, or the empty string.
    `uri` - The element's local name, or the empty string.
    `qname` - The element's qualified (prefixed) name, or the empty string.
  Throws:
    `org.xml.sax.SAXException` - The client may throw an exception during processing.
  See Also:
    `ContentHandler.endElement(java.lang.String, java.lang.String, java.lang.String)`

### characters

    public void characters(char[] chars,
                           int start,
                           int len)
                    throws org.xml.sax.SAXException

  Description copied from class: `org.xml.sax.helpers.XMLFilterImpl`
  Filter a character data event.

  Parameters:
    `chars` - An array of characters.
    `start` - The starting position in the array.
    `len` - The number of characters to use from the array.
  Throws:
    `org.xml.sax.SAXException` - The client may throw an exception during processing.
  See Also:
    `ContentHandler.characters(char[], int, int)`

### ignorableWhitespace

    public void ignorableWhitespace(char[] chars,
                                    int start,
                                    int len)
                             throws org.xml.sax.SAXException

  Description copied from class: `org.xml.sax.helpers.XMLFilterImpl`
  Filter an ignorable whitespace event.

  Parameters:
    `chars` - An array of characters.
    `start` - The starting position in the array.
    `len` - The number of characters to use from the array.
  Throws:
    `org.xml.sax.SAXException` - The client may throw an exception during processing.
  See Also:
    `ContentHandler.ignorableWhitespace(char[], int, int)`

### processingInstruction

    public void processingInstruction(java.lang.String name,
                                      java.lang.String data)
                               throws org.xml.sax.SAXException

  Description copied from class: `org.xml.sax.helpers.XMLFilterImpl`
  Filter a processing instruction event.

  Parameters:
    `name` - The processing instruction target.
    `data` - The text following the target.
  Throws:
    `org.xml.sax.SAXException` - The client may throw an exception during processing.
  See Also:
    `ContentHandler.processingInstruction(java.lang.String, java.lang.String)`