Package 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.

Author:

Lucian Chirita (lucianc@users.sourceforge.net)

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected static class	JaxenXPathExecuter.NodeListWrapper

Field Summary

Fields

Modifier and Type	Field	Description
static java.lang.String	EXCEPTION_MESSAGE_KEY_XPATH_COMPILATION_FAILURE
static java.lang.String	EXCEPTION_MESSAGE_KEY_XPATH_SELECTION_FAILURE

Constructor Summary

Constructors

Constructor	Description
JaxenXPathExecuter()

Method Summary

Modifier and Type	Method	Description
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

Field Detail

EXCEPTION_MESSAGE_KEY_XPATH_COMPILATION_FAILURE

public static final java.lang.String EXCEPTION_MESSAGE_KEY_XPATH_COMPILATION_FAILURE

See Also:

Constant Field Values

EXCEPTION_MESSAGE_KEY_XPATH_SELECTION_FAILURE

public static final java.lang.String EXCEPTION_MESSAGE_KEY_XPATH_SELECTION_FAILURE

See Also:

Constant Field Values

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