org.apache.excalibur.xml.xpath
Class Saxon8ProcessorImpl

java.lang.Object
  org.apache.avalon.framework.logger.AbstractLogEnabled
      org.apache.excalibur.xml.xpath.AbstractProcessorImpl
          org.apache.excalibur.xml.xpath.Saxon8ProcessorImpl

All Implemented Interfaces:

org.apache.avalon.framework.component.Component, org.apache.avalon.framework.configuration.Configurable, org.apache.avalon.framework.logger.LogEnabled, org.apache.avalon.framework.thread.ThreadSafe, PrefixResolver, XPathProcessor

public class Saxon8ProcessorImpl
extends AbstractProcessorImpl
implements org.apache.avalon.framework.thread.ThreadSafe

This class defines the implementation of the XPathProcessor component. This implementation depends on Saxon 8.X XSLT processor. This implementation was tested with Saxon 8.7 release. To configure it, add the following lines in the cocoon.xconf file:

 <xslt-processor class="org.apache.cocoon.components.xpath.Saxon7ProcessorImpl">
 </xslt-processor>
 

Nested Class Summary

private class

Saxon8ProcessorImpl.Saxon8Context

Field Summary

private static javax.xml.transform.TransformerFactory

factory

Fields inherited from interface org.apache.excalibur.xml.xpath.XPathProcessor

ROLE

Constructor Summary

Saxon8ProcessorImpl()

Method Summary

private net.sf.saxon.om.SequenceIterator	evaluate(org.w3c.dom.Node contextNode, java.lang.String str, PrefixResolver resolver)
boolean	evaluateAsBoolean(org.w3c.dom.Node contextNode, java.lang.String str, PrefixResolver resolver) Evaluate XPath expression within a context.
java.lang.Number	evaluateAsNumber(org.w3c.dom.Node contextNode, java.lang.String str, PrefixResolver resolver) Evaluate XPath expression within a context.
java.lang.String	evaluateAsString(org.w3c.dom.Node contextNode, java.lang.String str, PrefixResolver resolver) Evaluate XPath expression within a context.
private net.sf.saxon.om.Item	evaluateSingle(org.w3c.dom.Node contextNode, java.lang.String str, PrefixResolver resolver)
org.w3c.dom.NodeList	selectNodeList(org.w3c.dom.Node contextNode, java.lang.String str, PrefixResolver resolver) Use an XPath string to select a nodelist.
org.w3c.dom.Node	selectSingleNode(org.w3c.dom.Node contextNode, java.lang.String str, PrefixResolver resolver) Use an XPath string to select a single node.

Methods inherited from class org.apache.excalibur.xml.xpath.AbstractProcessorImpl

configure, evaluateAsBoolean, evaluateAsNumber, evaluateAsString, prefixToNamespace, selectNodeList, selectSingleNode

Methods inherited from class org.apache.avalon.framework.logger.AbstractLogEnabled

enableLogging, getLogger, setupLogger, setupLogger, setupLogger

Methods inherited from class java.lang.Object

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

Field Detail

factory

private static final javax.xml.transform.TransformerFactory factory

Constructor Detail

Saxon8ProcessorImpl

public Saxon8ProcessorImpl()

Method Detail

evaluateAsBoolean

public boolean evaluateAsBoolean(org.w3c.dom.Node contextNode,
                                 java.lang.String str,
                                 PrefixResolver resolver)

Evaluate XPath expression within a context.

Specified by:

evaluateAsBoolean in interface XPathProcessor

Specified by:

evaluateAsBoolean in class AbstractProcessorImpl

Parameters:

contextNode - The context node.

str - A valid XPath string.

resolver - a PrefixResolver, used for resolving namespace prefixes

Returns:

expression result as boolean.

evaluateAsNumber

public java.lang.Number evaluateAsNumber(org.w3c.dom.Node contextNode,
                                         java.lang.String str,
                                         PrefixResolver resolver)

Evaluate XPath expression within a context.

Specified by:

evaluateAsNumber in interface XPathProcessor

Specified by:

evaluateAsNumber in class AbstractProcessorImpl

Parameters:

contextNode - The context node.

str - A valid XPath string.

resolver - a PrefixResolver, used for resolving namespace prefixes

Returns:

expression result as number.

evaluateAsString

public java.lang.String evaluateAsString(org.w3c.dom.Node contextNode,
                                         java.lang.String str,
                                         PrefixResolver resolver)

Evaluate XPath expression within a context.

Specified by:

evaluateAsString in interface XPathProcessor

Specified by:

evaluateAsString in class AbstractProcessorImpl

Parameters:

contextNode - The context node.

str - A valid XPath string.

resolver - a PrefixResolver, used for resolving namespace prefixes

Returns:

expression result as string.

selectSingleNode

public org.w3c.dom.Node selectSingleNode(org.w3c.dom.Node contextNode,
                                         java.lang.String str,
                                         PrefixResolver resolver)

Description copied from class: AbstractProcessorImpl

Use an XPath string to select a single node.

Specified by:

selectSingleNode in interface XPathProcessor

Specified by:

selectSingleNode in class AbstractProcessorImpl

Parameters:

contextNode - The node to start searching from.

str - A valid XPath string.

resolver - a PrefixResolver, used for resolving namespace prefixes

Returns:

The first node found that matches the XPath, or null.

selectNodeList

public org.w3c.dom.NodeList selectNodeList(org.w3c.dom.Node contextNode,
                                           java.lang.String str,
                                           PrefixResolver resolver)

Description copied from class: AbstractProcessorImpl

Use an XPath string to select a nodelist.

Specified by:

selectNodeList in interface XPathProcessor

Specified by:

selectNodeList in class AbstractProcessorImpl

Parameters:

contextNode - The node to start searching from.

str - A valid XPath string.

resolver - a PrefixResolver, used for resolving namespace prefixes

Returns:

A List, should never be null.

evaluateSingle

private net.sf.saxon.om.Item evaluateSingle(org.w3c.dom.Node contextNode,
                                            java.lang.String str,
                                            PrefixResolver resolver)

evaluate

private net.sf.saxon.om.SequenceIterator evaluate(org.w3c.dom.Node contextNode,
                                                  java.lang.String str,
                                                  PrefixResolver resolver)