portal.xml.dom
Class PortalDOMXPathEvaluator

java.lang.Object
  portal.xml.dom.PortalDOMXPathEvaluator

All Implemented Interfaces:

org.w3c.dom.events.EventListener

public class PortalDOMXPathEvaluator

extends java.lang.Object

implements org.w3c.dom.events.EventListener

A wrapper for a JXPath context to evaluate XPath expression on a single DOM document.

Resolved values of XPaths get cached. Thus, this evaluator listens for DOM events when a DOM document has been modified in the meantime to flush all resolved values.

Version:

$Revision: 1.4 $

Author:

Thomas Weckert

Constructor Summary

PortalDOMXPathEvaluator(A_PortalDOMDocument instance)

Method Summary

boolean	existsNode(java.lang.String xpath)
boolean	existsText(java.lang.String xpath)
void	handleEvent(org.w3c.dom.events.Event event)
java.util.List	selectNodes(java.lang.String xpath)
org.w3c.dom.Element	selectSingleNode(java.lang.String xpath)
org.apache.commons.jxpath.Pointer	setValue(java.lang.String xpath, java.lang.Object value)

Methods inherited from class java.lang.Object

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

Constructor Detail

PortalDOMXPathEvaluator

public PortalDOMXPathEvaluator(A_PortalDOMDocument instance)

Method Detail

selectSingleNode

public org.w3c.dom.Element selectSingleNode(java.lang.String xpath)

selectNodes

public java.util.List selectNodes(java.lang.String xpath)

setValue

public org.apache.commons.jxpath.Pointer setValue(java.lang.String xpath,
                                                  java.lang.Object value)

handleEvent

public void handleEvent(org.w3c.dom.events.Event event)

Specified by:

handleEvent in interface org.w3c.dom.events.EventListener

See Also:

EventListener.handleEvent(org.w3c.dom.events.Event)

existsNode

public boolean existsNode(java.lang.String xpath)

existsText

public boolean existsText(java.lang.String xpath)