content: /*
   * 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);
  		}
  	}
  }
  