com.ten60.netkernel.util
Class FastXPath

java.lang.Object
  com.ten60.netkernel.util.FastXPath

public class FastXPath
extends java.lang.Object

A Fast implementation XPath for simple expressions. Evaluation shows it is an order of magnitude faster than xalan and will work for about 2/3 of expressions in normal usage.
It will evaluate xpaths of the forms:

• /a/b (absolute)
• a/b (relative)
• /a/* /c (disregard name)
• /a/b[1] (element position)

Constructor Summary

FastXPath()

Method Summary

static java.util.List	eval(org.w3c.dom.Node aContextNode, java.lang.String aXPath) Returns a nodeset of matching nodes for the evaluation of the xpath at the given context node
static org.w3c.dom.Node	getSingleNode(org.w3c.dom.Node aContextNode, java.lang.String aXPath)
static boolean	isSuitable(java.lang.String aXPath) Returns true if it is possible to evaluate the xpath using this engine

Methods inherited from class java.lang.Object

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

Constructor Detail

FastXPath

public FastXPath()

Method Detail

eval

public static java.util.List eval(org.w3c.dom.Node aContextNode,
                                  java.lang.String aXPath)
                           throws javax.xml.transform.TransformerException

Returns a nodeset of matching nodes for the evaluation of the xpath at the given context node

Throws:

javax.xml.transform.TransformerException

getSingleNode

public static org.w3c.dom.Node getSingleNode(org.w3c.dom.Node aContextNode,
                                             java.lang.String aXPath)
                                      throws javax.xml.transform.TransformerException

Throws:

javax.xml.transform.TransformerException

isSuitable

public static boolean isSuitable(java.lang.String aXPath)

Returns true if it is possible to evaluate the xpath using this engine