001// ***************************************************************************************************************************
002// * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.  See the NOTICE file *
003// * distributed with this work for additional information regarding copyright ownership.  The ASF licenses this file        *
004// * to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance            *
005// * with the License.  You may obtain a copy of the License at                                                              *
006// *                                                                                                                         *
007// *  http://www.apache.org/licenses/LICENSE-2.0                                                                             *
008// *                                                                                                                         *
009// * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an  *
010// * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the License for the        *
011// * specific language governing permissions and limitations under the License.                                              *
012// ***************************************************************************************************************************
013package org.apache.juneau.utils;
014
015import java.util.*;
016
017/**
018 * An extension of {@link LinkedHashMap} with a convenience {@link #append(Object,Object)} method.
019 * 
020 * <p>
021 * Primarily used for testing purposes for quickly creating populated maps.
022 * <p class='bcode'>
023 *    <jc>// Example:</jc>
024 *    Map&lt;String,Integer&gt; m = <jk>new</jk> AMap&lt;String,Integer&gt;()
025 *       .append(<js>"foo"</js>,1).append(<js>"bar"</js>,2);
026 * </p>
027 * 
028 * @param <K> The key type.
029 * @param <V> The value type.
030 */
031@SuppressWarnings("serial")
032public final class AMap<K,V> extends LinkedHashMap<K,V> {
033
034   /**
035    * Adds an entry to this map.
036    * 
037    * @param k The key.
038    * @param v The value.
039    * @return This object (for method chaining).
040    */
041   public AMap<K,V> append(K k, V v) {
042      put(k, v);
043      return this;
044   }
045}