/*
 * This file is part of Nuts Framework.
 * Copyright (C) 2009 Nuts Develop Team.
 *
 * Nuts Framework 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 3 of the License any later version.
 * 
 * Nuts Framework 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 Nuts Framework. If not, see <http://www.gnu.org/licenses/>.
 */
package nuts.exts.json.processors;

import net.sf.json.JSONArray;
import net.sf.json.JSONNull;
import net.sf.json.processors.DefaultValueProcessor;
import net.sf.json.util.JSONUtils;

/**
 * null value processor.
 * return null if object is null.
 */
public class NullDefaultValueProcessor implements DefaultValueProcessor {
	/**
	 * @see net.sf.json.processors.DefaultValueProcessor#getDefaultValue(java.lang.Class)
	 * @return null if object is null or JSONArray is type is array type.
	 */
	public Object getDefaultValue(Class type) {
		if (JSONUtils.isArray(type)) {
			return new JSONArray();
		}
		return JSONNull.getInstance();
	}
}
