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Cloud Load Balancers API for Rackspace

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/*
 * 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.jclouds.rackspace.cloudloadbalancers.v1.domain;

import java.util.Map;

import com.google.common.collect.ForwardingMap;
import static com.google.common.collect.Maps.newLinkedHashMap;
import static com.google.common.collect.Sets.newHashSet;

/**
 * Key and value must be 256 characters or less. All UTF-8 characters are valid.
 * 
 * Use the *Id methods when you need to get a metadata id for updating and removal.
 */
public class Metadata extends ForwardingMap {
   private final Map metadata = newLinkedHashMap(); // Implementing class must be sorted.
   private final Map keyToId = newLinkedHashMap();
   
   public Metadata(Metadata metadata) {
      super();
      this.metadata.putAll(metadata);
   }
   
   public Metadata() {
      super();
   }

   @Override
   protected Map delegate() {
      return metadata;
   }
   
   public int getId(String key) {
      return keyToId.get(key);
   }
   
   public Integer putId(String key, int id) {
      return keyToId.put(key, id);
   }

   public Iterable getIds() {
      return newHashSet(keyToId.values());
   }
}