Package net.sf.jasperreports.xalan.util

Class XalanXPathExecuter

java.lang.Object

net.sf.jasperreports.xalan.util.XalanXPathExecuter

All Implemented Interfaces:

JRXPathExecuter

Direct Known Subclasses:

XalanNsAwareXPathExecuter

public class XalanXPathExecuter
extends Object
implements JRXPathExecuter

XPath executer implementation that uses Apache Xalan.

Author:

Lucian Chirita (lucianc@users.sourceforge.net)

Field Summary

Fields

Modifier and Type	Field	Description
static String	EXCEPTION_MESSAGE_KEY_XPATH_SELECTION_FAILURE

Constructor Summary

Constructors

Constructor	Description
XalanXPathExecuter()	Default constructor.

Method Summary

Modifier and Type	Method	Description
NodeList	selectNodeList(Node contextNode, String expression)	Selects a node list by evaluating an XPath expression on a context node.
Object	selectObject(Node contextNode, 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_SELECTION_FAILURE

public static final String EXCEPTION_MESSAGE_KEY_XPATH_SELECTION_FAILURE

See Also:

Constant Field Values

Constructor Detail

XalanXPathExecuter

public XalanXPathExecuter()

Default constructor.

Method Detail

selectNodeList

public NodeList selectNodeList(Node contextNode,
                               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 Object selectObject(Node contextNode,
                           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