| /** |
| * 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. |
| */ |
| package org.apache.camel.processor; |
| |
| import java.util.Comparator; |
| import java.util.List; |
| import java.util.Set; |
| import java.util.TreeSet; |
| |
| import org.apache.camel.Exchange; |
| import org.apache.camel.Expression; |
| import org.apache.camel.Processor; |
| import org.apache.camel.util.ExpressionComparator; |
| import org.apache.camel.util.ExpressionListComparator; |
| |
| /** |
| * An implementation of the <a href="http://camel.apache.org/resequencer.html">Resequencer</a> |
| * which can reorder messages within a batch. |
| * |
| * @version $Revision$ |
| */ |
| public class Resequencer extends BatchProcessor { |
| |
| public Resequencer(Processor processor, Expression expression) { |
| this(processor, createSet(expression)); |
| } |
| |
| public Resequencer(Processor processor, List<Expression> expressions) { |
| this(processor, createSet(expressions)); |
| } |
| |
| public Resequencer(Processor processor, Set<Exchange> collection) { |
| super(processor, collection); |
| } |
| |
| @Override |
| public String toString() { |
| return "Resequencer[to: " + getProcessor() + "]"; |
| } |
| |
| // Implementation methods |
| //------------------------------------------------------------------------- |
| |
| protected static Set<Exchange> createSet(Expression expression) { |
| return createSet(new ExpressionComparator(expression)); |
| } |
| |
| protected static Set<Exchange> createSet(List<Expression> expressions) { |
| if (expressions.size() == 1) { |
| return createSet(expressions.get(0)); |
| } |
| return createSet(new ExpressionListComparator(expressions)); |
| } |
| |
| protected static Set<Exchange> createSet(Comparator<? super Exchange> comparator) { |
| return new TreeSet<Exchange>(comparator); |
| } |
| } |