/*
 * Copyright (C) 2005-2007 Alfresco Software Limited.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.

 * This program 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.  See the
 * GNU General Public License for more details.

 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

 * As a special exception to the terms and conditions of version 2.0 of 
 * the GPL, you may redistribute this Program in connection with Free/Libre 
 * and Open Source Software ("FLOSS") applications as described in Alfresco's 
 * FLOSS exception.  You should have recieved a copy of the text describing 
 * the FLOSS exception, and it is also available here: 
 * http://www.alfresco.com/legal/licensing"
 */
package org.alfresco.repo.jscript;

import java.util.Iterator;
import java.util.LinkedHashMap;

import org.mozilla.javascript.Scriptable;

/**
 * @author Kevin Roast
 */
public class ScriptableHashMap<K,V> extends LinkedHashMap<K, V> implements Scriptable
{
    private static final long serialVersionUID = 3664761893203964569L;
    
    private Scriptable parentScope;
    private Scriptable prototype;
    
    /**
     * @see org.mozilla.javascript.Scriptable#getClassName()
     */
    public String getClassName()
    {
        return "ScriptableHashMap";
    }

    /**
     * @see org.mozilla.javascript.Scriptable#get(java.lang.String, org.mozilla.javascript.Scriptable)
     */
    public Object get(String name, Scriptable start)
    {
        // get the property from the underlying QName map
        if ("length".equals(name))
        {
            return this.size();
        }
        else
        {
            return get(name);
        }
    }

    /**
     * @see org.mozilla.javascript.Scriptable#get(int, org.mozilla.javascript.Scriptable)
     */
    public Object get(int index, Scriptable start)
    {
        Object value =  null;
        int i=0;
        Iterator itrValues = this.values().iterator();
        while (i++ <= index && itrValues.hasNext())
        {
            value = itrValues.next();
        }
        return value;
    }

    /**
     * @see org.mozilla.javascript.Scriptable#has(java.lang.String, org.mozilla.javascript.Scriptable)
     */
    public boolean has(String name, Scriptable start)
    {
        // locate the property in the underlying map
        return containsKey(name);
    }

    /**
     * @see org.mozilla.javascript.Scriptable#has(int, org.mozilla.javascript.Scriptable)
     */
    public boolean has(int index, Scriptable start)
    {
        return (index >= 0 && this.values().size() > index);
    }

    /**
     * @see org.mozilla.javascript.Scriptable#put(java.lang.String, org.mozilla.javascript.Scriptable, java.lang.Object)
     */
    @SuppressWarnings("unchecked")
    public void put(String name, Scriptable start, Object value)
    {
        // add the property to the underlying QName map
        put((K)name, (V)value);
    }

    /**
     * @see org.mozilla.javascript.Scriptable#put(int, org.mozilla.javascript.Scriptable, java.lang.Object)
     */
    public void put(int index, Scriptable start, Object value)
    {
        // TODO: implement?
    }

    /**
     * @see org.mozilla.javascript.Scriptable#delete(java.lang.String)
     */
    public void delete(String name)
    {
        // remove the property from the underlying QName map
        remove(name);
    }

    /**
     * @see org.mozilla.javascript.Scriptable#delete(int)
     */
    public void delete(int index)
    {
        int i=0;
        Iterator itrKeys = this.keySet().iterator();
        while (i <= index && itrKeys.hasNext())
        {
            Object key = itrKeys.next();
            if (i == index)
            {
                remove(key);
                break;
            }
        }
    }

    /**
     * @see org.mozilla.javascript.Scriptable#getPrototype()
     */
    public Scriptable getPrototype()
    {
        return this.prototype;
    }

    /**
     * @see org.mozilla.javascript.Scriptable#setPrototype(org.mozilla.javascript.Scriptable)
     */
    public void setPrototype(Scriptable prototype)
    {
        this.prototype = prototype;
    }

    /**
     * @see org.mozilla.javascript.Scriptable#getParentScope()
     */
    public Scriptable getParentScope()
    {
        return this.parentScope;
    }

    /**
     * @see org.mozilla.javascript.Scriptable#setParentScope(org.mozilla.javascript.Scriptable)
     */
    public void setParentScope(Scriptable parent)
    {
        this.parentScope = parent;
    }

    /**
     * @see org.mozilla.javascript.Scriptable#getIds()
     */
    public Object[] getIds()
    {
        return keySet().toArray();
    }

    /**
     * @see org.mozilla.javascript.Scriptable#getDefaultValue(java.lang.Class)
     */
    public Object getDefaultValue(Class hint)
    {
        return null;
    }

    /**
     * @see org.mozilla.javascript.Scriptable#hasInstance(org.mozilla.javascript.Scriptable)
     */
    public boolean hasInstance(Scriptable instance)
    {
        return instance instanceof ScriptableHashMap;
    }
}