org.ikasan.framework.component.routing
Class XPathSelectorRouter

java.lang.Object
  org.ikasan.framework.component.routing.SingleResultRouter
      org.ikasan.framework.component.routing.XPathSelectorRouter

All Implemented Interfaces:

Router, FlowComponent

public class XPathSelectorRouter
extends SingleResultRouter

XPath router evaluation based on evaluating an incoming XPath expression into the node value. The resulting node value is returned. The pre-configured documentBuilderFactory and XPath selector expression are passed to this class on construction.

Author:

Ikasan Development Team

Field Summary

Fields inherited from interface org.ikasan.framework.component.routing.Router

DEFAULT_RESULT

Constructor Summary

XPathSelectorRouter(DocumentBuilderFactory factory, String xpathExpression)
Constructor with no default transition supported.

XPathSelectorRouter(DocumentBuilderFactory factory, String xpathExpression, boolean returnsDefaultForNonMatches)
Constructor

Method Summary

String

evaluate(Event event) Returns a single value as a result of evaluating the Event

Methods inherited from class org.ikasan.framework.component.routing.SingleResultRouter

onEvent

Methods inherited from class java.lang.Object

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

Constructor Detail

XPathSelectorRouter

public XPathSelectorRouter(DocumentBuilderFactory factory,
                           String xpathExpression,
                           boolean returnsDefaultForNonMatches)

Constructor

Parameters:

factory - - configured DocumentBuilderFactory

xpathExpression - - configured XPath expression to evaluate

returnsDefaultForNonMatches - - use the 'default' transition if no other transitions are matched

XPathSelectorRouter

public XPathSelectorRouter(DocumentBuilderFactory factory,
                           String xpathExpression)

Constructor with no default transition supported.

Parameters:

factory - - configured DocumentBuilderFactory

xpathExpression - - configured XPath expression

Method Detail

evaluate

public String evaluate(Event event)
                throws RouterException

Description copied from class: SingleResultRouter

Returns a single value as a result of evaluating the Event

Specified by:

evaluate in class SingleResultRouter

Parameters:

event - to evaluate

Returns:

result

Throws:

RouterException - Exception if we could not route the event