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.builder;
018    
019    import org.apache.camel.Exchange;
020    import org.apache.camel.Predicate;
021    
022    /**
023     * A useful base class for {@link Predicate} implementations
024     *
025     * @version $Revision: 617 $
026     */
027    public abstract class PredicateSupport<E extends Exchange> implements Predicate<E> {
028    
029        public void assertMatches(String text, E exchange) {
030            if (!matches(exchange)) {
031                throw new AssertionError(assertionFailureMessage(exchange)  + " on " + exchange);
032            }
033        }
034    
035        protected String assertionFailureMessage(E exchange) {
036            return toString();
037        }
038    }