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.converter;
019    
020    import org.apache.camel.Converter;
021    import org.apache.camel.Processor;
022    import org.apache.camel.Predicate;
023    import org.apache.camel.Exchange;
024    import org.apache.camel.Message;
025    import org.apache.camel.Expression;
026    
027    /**
028     * Some useful converters for Camel APIs such as to convert a {@link Predicate} or {@link Expression}
029     * to a {@link Processor}
030     *
031     * @version $Revision: 1.1 $
032     */
033    @Converter
034    public class CamelConverter {
035        @Converter
036        public Processor toProcessor(final Predicate<Exchange> predicate) {
037            return new Processor() {
038                public void process(Exchange exchange) throws Exception {
039                    boolean answer = predicate.matches(exchange);
040                    Message out = exchange.getOut();
041                    out.copyFrom(exchange.getIn());
042                    out.setBody(answer);
043                }
044            };
045    
046        }
047        
048        @Converter
049        public Processor toProcessor(final Expression<Exchange> expresion) {
050            return new Processor() {
051                public void process(Exchange exchange) throws Exception {
052                    Object answer = expresion.evaluate(exchange);
053                    Message out = exchange.getOut();
054                    out.copyFrom(exchange.getIn());
055                    out.setBody(answer);
056                }
057            };
058        }
059    }