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     */
017    package org.apache.camel.util;
018    
019    import java.util.Comparator;
020    
021    import org.apache.camel.Ordered;
022    
023    /**
024     * A comparator to sort {@link Ordered}
025     *
026     * @version 
027     */
028    public final class OrderedComparator implements Comparator<Object> {
029    
030        private final boolean reverse;
031    
032        public OrderedComparator() {
033            this(false);
034        }
035    
036        public OrderedComparator(boolean reverse) {
037            this.reverse = reverse;
038        }
039    
040        public int compare(Object o1, Object o2) {
041            Integer num1 = 0;
042            Integer num2 = 0;
043            if (o1 instanceof Ordered) {
044                num1 = ((Ordered) o1).getOrder();
045            }
046            if (o2 instanceof Ordered) {
047                num2 = ((Ordered) o2).getOrder();
048            }
049            int answer = num1.compareTo(num2);
050            return reverse ? -1 * answer : answer;
051        }
052    }