/*
 * $Id: IfInstanceOf.java,v 1.1 2008/02/06 10:43:44 linkconsulting Exp $
 *
 * Copyright (c) 2004 The Open For Business Project - www.ofbiz.org
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT
 * OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 */
package org.ofbiz.minilang.method.ifops;

import java.util.List;
import java.util.LinkedList;
import java.util.Map;

import org.ofbiz.minilang.method.MethodOperation;
import org.ofbiz.minilang.method.MethodContext;
import org.ofbiz.minilang.method.ContextAccessor;
import org.ofbiz.minilang.SimpleMethod;
import org.ofbiz.base.util.Debug;
import org.ofbiz.base.util.ObjectType;
import org.ofbiz.base.util.UtilXml;

import org.w3c.dom.Element;

/**
 * 
 * @author     <a href="mailto:jaz@ofbiz.org">Andy Zeneski</a>
 * @version    $Rev: 5462 $
 * @since      3.2
 */
public class IfInstanceOf extends MethodOperation {

    public static final String module = IfInstanceOf.class.getName();

    protected List subOps = new LinkedList();
    protected List elseSubOps = null;

    protected ContextAccessor mapAcsr = null;
    protected ContextAccessor fieldAcsr = null;
    protected String className = null;

    public IfInstanceOf(Element element, SimpleMethod simpleMethod) {
        super(element, simpleMethod);
        this.mapAcsr = new ContextAccessor(element.getAttribute("map-name"));
        this.fieldAcsr = new ContextAccessor(element.getAttribute("field-name"));
        this.className = element.getAttribute("class");

        SimpleMethod.readOperations(element, subOps, simpleMethod);

        Element elseElement = UtilXml.firstChildElement(element, "else");
        if (elseElement != null) {
            elseSubOps = new LinkedList();
            SimpleMethod.readOperations(elseElement, elseSubOps, simpleMethod);
        }
    }

    public boolean exec(MethodContext methodContext) {
        // only run subOps if element is instanceOf
        boolean runSubOps = false;
        Object fieldVal = null;

        if (!mapAcsr.isEmpty()) {
            Map fromMap = (Map) mapAcsr.get(methodContext);
            if (fromMap == null) {
                if (Debug.infoOn()) Debug.logInfo("Map not found with name " + mapAcsr + ", running operations", module);
            } else {
                fieldVal = fieldAcsr.get(fromMap, methodContext);
            }
        } else {
            // no map name, try the env
            fieldVal = fieldAcsr.get(methodContext);
        }

        runSubOps = ObjectType.instanceOf(fieldVal, className);

        if (runSubOps) {
            return SimpleMethod.runSubOps(subOps, methodContext);
        } else {
            if (elseSubOps != null) {
                return SimpleMethod.runSubOps(elseSubOps, methodContext);
            } else {
                return true;
            }
        }
    }

    public String rawString() {
        // TODO: add all attributes and other info
        return "<if-instance-of field-name=\"" + this.fieldAcsr + "\" map-name=\"" + this.mapAcsr + "\"/>";
    }
    public String expandedString(MethodContext methodContext) {
        // TODO: something more than a stub/dummy
        return this.rawString();
    }
}
