/*
 This file belongs to the Servoy development and deployment environment, Copyright (C) 1997-2010 Servoy BV

 This program is free software; you can redistribute it and/or modify it under
 the terms of the GNU Affero General Public License as published by the Free
 Software Foundation; either version 3 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 Affero General Public License for more details.

 You should have received a copy of the GNU Affero General Public License along
 with this program; if not, see http://www.gnu.org/licenses or write to the Free
 Software Foundation,Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
 */
package com.servoy.j2db.util.serialize;


import org.json.JSONObject;
import org.mozilla.javascript.Undefined;

import com.servoy.j2db.dataprocessing.IDatabaseManager;
import com.servoy.j2db.dataprocessing.IFoundSet;
import com.servoy.j2db.dataprocessing.IRecord;

public class JSONConverter
{

	private JSONSerializerWrapper serializerWrapper;
	private final IDatabaseManager databaseManager;

	public JSONConverter()
	{
		this(null);
	}

	/**
	 * @param databaseManager
	 */
	public JSONConverter(IDatabaseManager databaseManager)
	{
		this.databaseManager = databaseManager;
	}

	private JSONSerializerWrapper getJSONSerializer()
	{
		if (serializerWrapper == null)
		{
			serializerWrapper = new JSONSerializerWrapper(true);
		}
		return serializerWrapper;
	}

	/**
	 * @param value
	 * @return
	 * @throws Exception 
	 */
	public String convertToJSON(Object value) throws Exception
	{
		if (value == null || value == Undefined.instance) return null;
		if (value instanceof IFoundSet || value instanceof IRecord) throw new RuntimeException("value cant be a record or foundset"); //$NON-NLS-1$

		return getJSONSerializer().toJSON(value).toString();
	}

	/**
	 * @param retval
	 * @param args 
	 * @return
	 * @throws Exception 
	 */
	public Object convertFromJSON(Object retval) throws Exception
	{
		return convertFromJSON(databaseManager, retval);
	}

	/**
	 * @param retval
	 * @param args 
	 * @return
	 * @throws Exception 
	 */
	public Object convertFromJSON(IDatabaseManager dbmgr, Object retval) throws Exception
	{
		if (retval instanceof String)
		{
			return getJSONSerializer().fromJSON(dbmgr, (String)retval);
		}
		if (retval instanceof JSONObject)
		{
			return getJSONSerializer().fromJSON(dbmgr, (JSONObject)retval);
		}
		return retval;
	}
}