001 /** 002 * 003 * Licensed to the Apache Software Foundation (ASF) under one or more 004 * contributor license agreements. See the NOTICE file distributed with 005 * this work for additional information regarding copyright ownership. 006 * The ASF licenses this file to You under the Apache License, Version 2.0 007 * (the "License"); you may not use this file except in compliance with 008 * the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018 package org.apache.camel.impl; 019 020 import org.apache.camel.Predicate; 021 import org.apache.camel.Exchange; 022 023 /** 024 * A useful base class for {@link Predicate} implementations 025 * 026 * @version $Revision: 1.1 $ 027 */ 028 public abstract class PredicateSupport<E extends Exchange> implements Predicate<E> { 029 030 public void assertMatches(String text, E exchange) { 031 if (! matches(exchange)) { 032 throw new AssertionError(assertionFailureMessage(exchange)); 033 } 034 } 035 036 protected String assertionFailureMessage(E exchange) { 037 return this + " failed on " + exchange; 038 } 039 }