/* * Copyright (c) 2002-2003 by OpenSymphony * All rights reserved. */package com.opensymphony.workflow.loader;import com.opensymphony.workflow.InvalidWorkflowDescriptorException;import com.opensymphony.workflow.util.Validatable;import org.w3c.dom.Element;import java.io.PrintWriter;import java.util.ArrayList;import java.util.List;/** * DOCUMENT ME! */public class JoinDescriptor extends AbstractDescriptor implements Validatable {    //~ Instance fields ////////////////////////////////////////////////////////    protected List conditions = new ArrayList();    protected ResultDescriptor result;    //~ Constructors ///////////////////////////////////////////////////////////    /**     * @deprecated use {@link DescriptorFactory} instead     */    JoinDescriptor() {    }    /**     * @deprecated use {@link DescriptorFactory} instead     */    JoinDescriptor(Element join) {        init(join);    }    //~ Methods ////////////////////////////////////////////////////////////////    public List getConditions() {        return conditions;    }    public void setResult(ResultDescriptor result) {        this.result = result;    }    public ResultDescriptor getResult() {        return result;    }    public void validate() throws InvalidWorkflowDescriptorException {        ValidationHelper.validate(conditions);        if (result == null) {            throw new InvalidWorkflowDescriptorException("Join has no result");        }        result.validate();    }    public void writeXML(PrintWriter out, int indent) {        XMLUtil.printIndent(out, indent++);        out.println("<join id=\"" + getId() + "\">");        if (conditions.size() > 0) {            for (int i = 0; i < conditions.size(); i++) {                ConditionsDescriptor condition = (ConditionsDescriptor) conditions.get(i);                condition.writeXML(out, indent);            }        }        if (result != null) {            result.writeXML(out, indent);        }        XMLUtil.printIndent(out, --indent);        out.println("</join>");    }    protected void init(Element join) {        try {            setId(Integer.parseInt(join.getAttribute("id")));        } catch (Exception ex) {            throw new IllegalArgumentException("Invalid join id value " + join.getAttribute("id"));        }        // get conditions        List conditionNodes = XMLUtil.getChildElements(join, "conditions");        int length = conditionNodes.size();        for (int i = 0; i < length; i++) {            Element condition = (Element) conditionNodes.get(i);            ConditionsDescriptor conditionDescriptor = DescriptorFactory.getFactory().createConditionsDescriptor(condition);            conditionDescriptor.setParent(this);            this.conditions.add(conditionDescriptor);        }        //<unconditional-result status="Underway" owner="test" step="2"/>        Element resultElement = XMLUtil.getChildElement(join, "unconditional-result");        // [KAP] This allows loading a workflow with Joins without unconditional-results        if (resultElement != null) {            result = new ResultDescriptor(resultElement);            result.setParent(this);        }    }}