org.ten60.netkernel.xml.xda
Class DOMXPathImplementation

java.lang.Object
  org.ten60.netkernel.xml.xda.DOMXPathImplementation

All Implemented Interfaces:

IXPathImplementation

public class DOMXPathImplementation
extends java.lang.Object
implements IXPathImplementation

Wrapper around evaluation of xpaths using xalan. An attempt is made to minimise memory usage by reusing contexts and caching last node id and parsed xpath.

Constructor Summary

DOMXPathImplementation()
Creates a new instance of XPathAPIWrapper

Method Summary

IXPathResult	eval(java.lang.Object aContextNode, java.lang.String aXPath) Evaluates an xpath expression on the given context node
org.apache.xml.utils.PrefixResolver	getPrefixResolver()
void	reset() reset the evaluator after the document has changed
void	resetPrefixResolver()

Methods inherited from class java.lang.Object

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

Constructor Detail

DOMXPathImplementation

public DOMXPathImplementation()

Creates a new instance of XPathAPIWrapper

Method Detail

eval

public final IXPathResult eval(java.lang.Object aContextNode,
                               java.lang.String aXPath)
                        throws XPathImplementationException

Evaluates an xpath expression on the given context node

Specified by:

eval in interface IXPathImplementation

Parameters:

aContextNode - an implementation specific context object

aXPath - an xpath into the document

Throws:

XPathImplementationException - thrown if the evaluation fails for any reason

reset

public void reset()

reset the evaluator after the document has changed

Specified by:

reset in interface IXPathImplementation

resetPrefixResolver

public void resetPrefixResolver()

getPrefixResolver

public org.apache.xml.utils.PrefixResolver getPrefixResolver()