Class XalanXPathAPI

java.lang.Object

org.apache.xml.security.utils.XalanXPathAPI

All Implemented Interfaces:

XPathAPI

public class XalanXPathAPI
extends Object
implements XPathAPI

An implementation of XPathAPI using Xalan. This supports the "here()" function defined in the digital signature spec.

Field Summary

Fields

Modifier and Type	Field	Description
private org.apache.xpath.XPathContext	context
private static org.apache.xpath.compiler.FunctionTable	funcTable
private static boolean	installed
private static final org.slf4j.Logger	LOG
private org.apache.xpath.XPath	xpath
private String	xpathStr

Constructor Summary

Constructors

Constructor	Description
XalanXPathAPI()

Method Summary

Modifier and Type	Method	Description
void	clear()	Clear any context information from this object
private org.apache.xpath.XPath	createXPath(String str, org.apache.xml.utils.PrefixResolver prefixResolver)
private org.apache.xpath.objects.XObject	eval(Node contextNode, Node xpathnode, String str, Node namespaceNode)
boolean	evaluate(Node contextNode, Node xpathnode, String str, Node namespaceNode)	Evaluate an XPath string and return true if the output is to be included or not.
private static void	fixupFunctionTable()
static boolean	isInstalled()
NodeList	selectNodeList(Node contextNode, Node xpathnode, String str, Node namespaceNode)	Use an XPath string to select a nodelist.

Methods inherited from class Object

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

Field Details

LOG

private static final org.slf4j.Logger LOG

xpathStr

private String xpathStr

xpath

private org.apache.xpath.XPath xpath

funcTable

private static org.apache.xpath.compiler.FunctionTable funcTable

installed

private static boolean installed

context

private org.apache.xpath.XPathContext context

Constructor Details

XalanXPathAPI

public XalanXPathAPI()

Method Details

selectNodeList

public NodeList selectNodeList(Node contextNode,
 Node xpathnode,
 String str,
 Node namespaceNode)
                        throws TransformerException

Use an XPath string to select a nodelist. XPath namespace prefixes are resolved from the namespaceNode.

Specified by:

selectNodeList in interface XPathAPI

Parameters:

contextNode - The node to start searching from.

xpathnode -

str -

namespaceNode - The node from which prefixes in the XPath will be resolved to namespaces.

Returns:

A NodeIterator, should never be null.

Throws:

TransformerException

evaluate

public boolean evaluate(Node contextNode,
 Node xpathnode,
 String str,
 Node namespaceNode)
                 throws TransformerException

Evaluate an XPath string and return true if the output is to be included or not.

Specified by:

evaluate in interface XPathAPI

Parameters:

contextNode - The node to start searching from.

xpathnode - The XPath node

str - The XPath expression

namespaceNode - The node from which prefixes in the XPath will be resolved to namespaces.

Throws:

TransformerException

clear

public void clear()

Clear any context information from this object

Specified by:

clear in interface XPathAPI

isInstalled

public static boolean isInstalled()

eval

private org.apache.xpath.objects.XObject eval(Node contextNode,
 Node xpathnode,
 String str,
 Node namespaceNode)
                                       throws TransformerException

Throws:

TransformerException

createXPath

private org.apache.xpath.XPath createXPath(String str,
 org.apache.xml.utils.PrefixResolver prefixResolver)
                                    throws TransformerException

Throws:

TransformerException

fixupFunctionTable

private static void fixupFunctionTable()