/* * 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;/** * @author <a href="mailto:plightbo@hotmail.com">Pat Lightbody</a> */public class RestrictionDescriptor extends AbstractDescriptor implements Validatable {    //~ Instance fields ////////////////////////////////////////////////////////    protected List conditions = new ArrayList();    //~ Constructors ///////////////////////////////////////////////////////////    public RestrictionDescriptor() {    }    public RestrictionDescriptor(Element restriction) {        init(restriction);    }    //~ Methods ////////////////////////////////////////////////////////////////    /**     * @deprecated A restrict-to can only have one conditions element,     * please use {@link #getConditionsDescriptor()} instead.     */    public List getConditions() {        return conditions;    }    public void setConditionsDescriptor(ConditionsDescriptor descriptor) {        if (conditions.size() == 1) {            conditions.set(0, descriptor);        } else {            conditions.add(descriptor);        }    }    public ConditionsDescriptor getConditionsDescriptor() {        if (conditions.size() == 0) {            return null;        }        return (ConditionsDescriptor) conditions.get(0);    }    public void validate() throws InvalidWorkflowDescriptorException {        if (conditions.size() > 1) {            throw new InvalidWorkflowDescriptorException("A restrict-to element can only have one conditions child element");        }        ValidationHelper.validate(conditions);    }    public void writeXML(PrintWriter out, int indent) {        ConditionsDescriptor conditions = getConditionsDescriptor();        List list = conditions.getConditions();        if (list.size() == 0) {            return;        }        XMLUtil.printIndent(out, indent++);        out.println("<restrict-to>");        conditions.writeXML(out, indent);        XMLUtil.printIndent(out, --indent);        out.println("</restrict-to>");    }    protected void init(Element restriction) {        // set up condition - OPTIONAL        List conditionNodes = XMLUtil.getChildElements(restriction, "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);        }    }}