net.sf.jasperreports.engine.util.xml
Class JaxenXPathExecuter

java.lang.Object
  net.sf.jasperreports.engine.util.xml.JaxenXPathExecuter

All Implemented Interfaces:

JRXPathExecuter

Direct Known Subclasses:

JaxenNsAwareXPathExecuter

public class JaxenXPathExecuter
extends java.lang.Object
implements JRXPathExecuter

XPath executer implementation that uses Jaxen.

Version:

$Id: JaxenXPathExecuter.java 3034 2009-08-27 11:58:04Z teodord $

Author:

Lucian Chirita (lucianc@users.sourceforge.net)

Nested Class Summary

protected static class

JaxenXPathExecuter.NodeListWrapper

Constructor Summary

JaxenXPathExecuter()

Method Summary

protected org.jaxen.XPath	getXPath(java.lang.String expression)
org.w3c.dom.NodeList	selectNodeList(org.w3c.dom.Node contextNode, java.lang.String expression) Selects a node list by evaluating an XPath expression on a context node.
java.lang.Object	selectObject(org.w3c.dom.Node contextNode, java.lang.String expression) Selects an object by evaluating an XPath expression on a context node.

Methods inherited from class java.lang.Object

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

Constructor Detail

JaxenXPathExecuter

public JaxenXPathExecuter()

Method Detail

getXPath

protected org.jaxen.XPath getXPath(java.lang.String expression)
                            throws JRException

Throws:

JRException

selectNodeList

public org.w3c.dom.NodeList selectNodeList(org.w3c.dom.Node contextNode,
                                           java.lang.String expression)
                                    throws JRException

Description copied from interface: JRXPathExecuter

Selects a node list by evaluating an XPath expression on a context node.

Specified by:

selectNodeList in interface JRXPathExecuter

Parameters:

contextNode - the context node (a document can also be used)

expression - the XPath expression

Returns:

the selected node list

Throws:

JRException - if the XPath evaluation failed

selectObject

public java.lang.Object selectObject(org.w3c.dom.Node contextNode,
                                     java.lang.String expression)
                              throws JRException

Description copied from interface: JRXPathExecuter

Selects an object by evaluating an XPath expression on a context node.

If the expression evaluates to a node list, the first node in the list should be returned. Otherwise, the primitive value resulted from the evaluation should be returned as a java.lang.String, java.lang.Number or java.lang.Boolean.

Specified by:

selectObject in interface JRXPathExecuter

Parameters:

contextNode - the context node (a document can also be used)

expression - the XPath expression

Returns:

the selected node or value

Throws:

JRException - if the XPath evaluation failed