org.mule.module.xml.expression
Class AbstractXPathExpressionEvaluator

java.lang.Object
  org.mule.module.xml.expression.AbstractXPathExpressionEvaluator

All Implemented Interfaces:

MuleContextAware, ExpressionEvaluator, Disposable, Initialisable, NamedObject

Direct Known Subclasses:

BeanPayloadExpressionEvaluator, XPathExpressionEvaluator

public abstract class AbstractXPathExpressionEvaluator
extends Object
implements ExpressionEvaluator, Initialisable, Disposable, MuleContextAware

Provides a base class for XPath property extractors. The XPath engine used is jaxen (http://jaxen.org) which supports XPath queries on other object models such as JavaBeans as well as Xml

Field Summary

Fields inherited from interface org.mule.api.lifecycle.Initialisable

PHASE_NAME

Fields inherited from interface org.mule.api.lifecycle.Disposable

PHASE_NAME

Constructor Summary

AbstractXPathExpressionEvaluator()

Method Summary

protected void	addNamespaces(NamespaceManager manager, org.jaxen.XPath xpath)
protected abstract org.jaxen.XPath	createXPath(String expression, Object object)
void	dispose() A lifecycle method where implementor should free up any resources.
Object	evaluate(String expression, MuleMessage message)
protected abstract Object	extractResultFromNode(Object result)
protected List<?>	extractResultsFromNodes(List<?> results)
MuleContext	getMuleContext()
NamespaceManager	getNamespaceManager()
protected Object	getPayloadForXPath(MuleMessage message)
protected org.jaxen.XPath	getXPath(String expression, Object object)
protected String	getXPathClassName(Object object)
void	initialise()
void	inject()
void	setMuleContext(MuleContext context)
void	setNamespaceManager(NamespaceManager namespaceManager)

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.mule.api.NamedObject

getName

Constructor Detail

AbstractXPathExpressionEvaluator

public AbstractXPathExpressionEvaluator()

Method Detail

setMuleContext

public void setMuleContext(MuleContext context)

Specified by:

setMuleContext in interface MuleContextAware

initialise

public void initialise()
                throws InitialisationException

Specified by:

initialise in interface Initialisable

Throws:

InitialisationException

inject

public void inject()
            throws Exception

Throws:

Exception

evaluate

public Object evaluate(String expression,
                       MuleMessage message)

Specified by:

evaluate in interface ExpressionEvaluator

getPayloadForXPath

protected Object getPayloadForXPath(MuleMessage message)
                             throws TransformerException

Throws:

TransformerException

addNamespaces

protected void addNamespaces(NamespaceManager manager,
                             org.jaxen.XPath xpath)

getXPath

protected org.jaxen.XPath getXPath(String expression,
                                   Object object)
                            throws org.jaxen.JaxenException

Throws:

org.jaxen.JaxenException

getXPathClassName

protected String getXPathClassName(Object object)

createXPath

protected abstract org.jaxen.XPath createXPath(String expression,
                                               Object object)
                                        throws org.jaxen.JaxenException

Throws:

org.jaxen.JaxenException

extractResultsFromNodes

protected List<?> extractResultsFromNodes(List<?> results)

dispose

public void dispose()

A lifecycle method where implementor should free up any resources. If an exception is thrown it should just be logged and processing should continue. This method should not throw Runtime exceptions.

Specified by:

dispose in interface Disposable

getNamespaceManager

public NamespaceManager getNamespaceManager()

setNamespaceManager

public void setNamespaceManager(NamespaceManager namespaceManager)

getMuleContext

public MuleContext getMuleContext()

extractResultFromNode

protected abstract Object extractResultFromNode(Object result)