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.processor.resequencer; 018 019 import java.util.Comparator; 020 021 /** 022 * A strategy for comparing elements of a sequence. 023 * 024 * @author Martin Krasser 025 * 026 * @version $Revision: 1276 $ 027 */ 028 public interface SequenceElementComparator<E> extends Comparator<E> { 029 030 /** 031 * Returns <code>true</code> if <code>o1</code> is an immediate predecessor 032 * of <code>o2</code>. 033 * 034 * @param o1 a sequence element. 035 * @param o2 a sequence element. 036 */ 037 boolean predecessor(E o1, E o2); 038 039 /** 040 * Returns <code>true</code> if <code>o1</code> is an immediate successor 041 * of <code>o2</code>. 042 * 043 * @param o1 a sequence element. 044 * @param o2 a sequence element. 045 */ 046 boolean successor(E o1, E o2); 047 048 }