package org.apache.solr.common.util; /** * 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. */ import java.util.*; /** SimpleOrderedMap is a {@link NamedList} where access by key is more * important than maintaining order when it comes to representing the * held data in other forms, as ResponseWriters normally do. * It's normally not a good idea to repeat keys or use null keys, but this * is not enforced. If key uniqueness enforcement is desired, use a regular {@link Map}. *

* For example, a JSON response writer may choose to write a SimpleOrderedMap * as {"foo":10,"bar":20} and may choose to write a NamedList as * ["foo",10,"bar",20]. An XML response writer may choose to render both * the same way. *

*

* This class does not provide efficient lookup by key, it's main purpose is * to hold data to be serialized. It aims to minimize overhead and to be * efficient at adding new elements. *

*/ public class SimpleOrderedMap extends NamedList { /** Creates an empty instance */ public SimpleOrderedMap() { super(); } /** * Creates an instance backed by an explicitly specified list of * pairwise names/values. * * @param nameValuePairs underlying List which should be used to implement a SimpleOrderedMap; modifying this List will affect the SimpleOrderedMap. */ @Deprecated public SimpleOrderedMap(List nameValuePairs) { super(nameValuePairs); } public SimpleOrderedMap(Map.Entry[] nameValuePairs) { super(nameValuePairs); } @Override public SimpleOrderedMap clone() { ArrayList newList = new ArrayList(nvPairs.size()); newList.addAll(nvPairs); return new SimpleOrderedMap(newList); } }