001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.camel.util;
018
019import java.io.Serial;
020import java.util.Map;
021import java.util.TreeMap;
022
023/**
024 * A map that uses case insensitive keys, but preserves the original key cases.
025 * <p/>
026 * The map is based on {@link TreeMap} and therefore uses O(n) for lookup and not O(1) as a {@link java.util.HashMap}
027 * does.
028 * <p/>
029 * This map is <b>not</b> designed to be thread safe as concurrent access to it is not supposed to be performed by the
030 * Camel routing engine.
031 */
032public class CaseInsensitiveMap extends TreeMap<String, Object> {
033
034    private static final @Serial long serialVersionUID = -8538318195477618308L;
035
036    public CaseInsensitiveMap() {
037        super(String.CASE_INSENSITIVE_ORDER);
038    }
039
040    public CaseInsensitiveMap(Map<? extends String, ?> map) {
041        // must use the insensitive order
042        super(String.CASE_INSENSITIVE_ORDER);
043        putAll(map);
044    }
045
046}