xpathjoinconditionevaluator.java

jbpm-bpel-1.1.Beta3 JBoss jBPM Starters Kit 是一个综合包

/*
 * JBoss, Home of Professional Open Source
 * Copyright 2005, JBoss Inc., and individual contributors as indicated
 * by the @authors tag.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the JBPM BPEL PUBLIC LICENSE AGREEMENT as
 * published by JBoss Inc.; either version 1.0 of the License, or
 * (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 */
package org.jbpm.bpel.sublang.xpath;

import java.util.Iterator;

import org.jaxen.Context;
import org.jaxen.ContextSupport;
import org.jaxen.FunctionContext;
import org.jaxen.JaxenException;
import org.jaxen.SimpleVariableContext;
import org.jaxen.XPathFunctionContext;

import org.jbpm.bpel.graph.def.Activity;
import org.jbpm.bpel.graph.def.LinkDefinition;
import org.jbpm.bpel.xml.BpelConstants;
import org.jbpm.graph.exe.Token;

/**
 * Evaluator for expressions in join conditions. Only link status can be used
 * within join conditions and only join conditions can make use of link status.
 * @see "WS-BPEL 2.0 §12.5.1"
 * @author Juan Cant