content: package act.data;
  
  /*-
   * #%L
   * ACT Framework
   * %%
   * Copyright (C) 2014 - 2017 ActFramework
   * %%
   * 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.
   * #L%
   */
  
  import act.Act;
  import com.alibaba.fastjson.JSON;
  import com.alibaba.fastjson.JSONObject;
  import org.osgl.$;
  import org.osgl.util.ValueObject;
  
  import java.util.Map;
  
  public abstract class MapCodec<T extends Map<String, Object>> implements ValueObject.Codec<T> {
  
      private Class<T> targetClass;
  
      public MapCodec(Class<T> targetClass) {
          this.targetClass = $.requireNotNull(targetClass);
      }
  
      @Override
      public Class<T> targetClass() {
          return targetClass;
      }
  
      @Override
      public T parse(String s) {
          JSONObject json = JSON.parseObject(s);
          T map = Act.app().getInstance(targetClass);
          for (Map.Entry<String, Object> entry : json.entrySet()) {
              map.put(entry.getKey(), ValueObject.of(entry.getValue()));
          }
          return map;
      }
  
      @Override
      public String toString(T o) {
          return JSON.toJSONString(o);
      }
  
      @Override
      public String toJSONString(T o) {
          return toString(o);
      }
  
      public static class JsonObjectCodec extends MapCodec<JSONObject> {
          public JsonObjectCodec() {
              super(JSONObject.class);
          }
      }
  
      public static class GenericMapCodec extends MapCodec<Map<String, Object>> {
          public GenericMapCodec() {
              super(target());
          }
  
          private static Class<Map<String, Object>> target() {
              return $.cast(Map.class);
          }
      }
  
  }
  