| /** |
| * 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.util; |
| |
| import java.util.Comparator; |
| import java.util.List; |
| |
| import org.apache.camel.Exchange; |
| import org.apache.camel.Expression; |
| |
| /** |
| * An implementation of {@link java.util.Comparator} which takes a list of |
| * {@link org.apache.camel.Expression} objects which is evaluated |
| * on each exchange to compare them |
| * |
| * @version |
| */ |
| public class ExpressionListComparator implements Comparator<Exchange> { |
| private final List<Expression> expressions; |
| |
| public ExpressionListComparator(List<Expression> expressions) { |
| this.expressions = expressions; |
| } |
| |
| public int compare(Exchange e1, Exchange e2) { |
| for (Expression expression : expressions) { |
| Object o1 = expression.evaluate(e1, Object.class); |
| Object o2 = expression.evaluate(e2, Object.class); |
| int answer = ObjectHelper.compare(o1, o2); |
| if (answer != 0) { |
| return answer; |
| } |
| } |
| return 0; |
| } |
| } |