/**
 * Copyright 2013-2014 Guoqiang Chen, Shanghai, China. All rights reserved.
 *
 * Email: subchen@gmail.com
 * URL: http://subchen.github.io/
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package jetbrick.web.mvc;

import java.util.HashMap;
import jetbrick.lang.JSONUtils;

@SuppressWarnings("serial")
public class Model extends HashMap<String, Object> {
    public static final String NAME_IN_REQUEST = Model.class.getName();

    public Object add(String name, Object value) {
        if (value == null) {
            return super.remove(name);
        } else {
            return super.put(name, value);
        }
    }

    @Override
    public Object put(String name, Object value) {
        if (value == null) {
            return super.remove(name);
        } else {
            return super.put(name, value);
        }
    }

    /**
     * 使用内置的 json 库，转成 json 字符串
     */
    public String toJSONString() {
        return JSONUtils.toJSONString(this);
    }
}