/*

  * Licensed to the Apache Software Foundation (ASF) under one

  * or more contributor license agreements. See the NOTICE file

  * distributed with this work for additional information

  * regarding copyright ownership. The ASF licenses this file

  * to you 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 org.apache.shindig.social.opensocial.spi;

 import org.apache.commons.lang.StringUtils;

 import com.google.common.collect.Maps;

 import java.util.Map;

 public class GroupId {

   public enum Type {

     all, friends, self, deleted, groupId;

     /** A map of JSON strings to Type objects */

     private static final Map<String, Type> jsonTypeMap = Maps.newHashMap();

     static {

       for (Type type : Type.values()) {

         jsonTypeMap.put("@" + type.name(), type);

       }

     }

     /** Return the Type enum value given a specific jsonType **/

     public static Type jsonValueOf(String jsonType) {

        return jsonTypeMap.get(jsonType);

     }

   }

   private Type type;

   private String groupId;

   public GroupId(Type type, String groupId) {

     this.groupId = groupId;

     this.type = type;

   }

   public Type getType() {

     return type;

   }

   public String getGroupId() {

     // Only valid for objects with type=groupId

     return groupId;

   }

   public static GroupId fromJson(String jsonId) {

     Type idSpecEnum = Type.jsonValueOf(jsonId);

     if (idSpecEnum != null) {

       return new GroupId(idSpecEnum, null);

     }

     return new GroupId(Type.groupId, jsonId);

   }

   // These are overriden so that EasyMock doesn't throw a fit

   @Override

   public boolean equals(Object o) {

     if (!(o instanceof GroupId)) {

       return false;

     }

     GroupId actual = (GroupId) o;

     return this.type == actual.type

         && StringUtils.equals(this.groupId, actual.groupId);

   }

   @Override

   public int hashCode() {

     int groupHashCode = 0;

     if (this.groupId != null) {

       groupHashCode = this.groupId.hashCode();

     }

     return this.type.hashCode() + groupHashCode;

   }

 }