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.processor.interceptor;
018    
019    import java.util.List;
020    
021    import org.apache.camel.Exchange;
022    import org.apache.camel.NoTypeConversionAvailableException;
023    import org.apache.camel.Processor;
024    import org.apache.camel.converter.stream.StreamCache;
025    import org.apache.camel.model.InterceptorRef;
026    import org.apache.camel.model.InterceptorType;
027    import org.apache.camel.processor.Interceptor;
028    
029    /**
030     * {@link Interceptor} that converts a message into a re-readable format
031     */
032    public class StreamCachingInterceptor extends Interceptor {
033    
034        public StreamCachingInterceptor() {
035            super();
036            setInterceptorLogic(new Processor() {
037                public void process(Exchange exchange) throws Exception {
038                    try {
039                        StreamCache newBody = exchange.getIn().getBody(StreamCache.class);
040                        if (newBody != null) {
041                            newBody.reset();
042                            exchange.getIn().setBody(newBody);
043                        }
044                    } catch (NoTypeConversionAvailableException ex) {
045                        // ignore if in is not of StreamCache type
046                    }
047                    proceed(exchange);
048                }
049            });
050        }
051    
052        public StreamCachingInterceptor(Processor processor) {
053            this();
054            setProcessor(processor);
055        }
056    
057        @Override
058        public String toString() {
059            return "StreamCachingInterceptor";
060        }
061    
062        /**
063         * Remove the {@link StreamCachingInterceptor} type of interceptor from the given list of interceptors
064         *
065         * @param interceptors the list of interceptors
066         */
067        public static void noStreamCaching(List<InterceptorType> interceptors) {
068            for (int i = 0; i < interceptors.size(); i++) {
069                InterceptorType interceptor = interceptors.get(i);
070                if (interceptor instanceof InterceptorRef
071                    && ((InterceptorRef)interceptor).getInterceptor() instanceof StreamCachingInterceptor) {
072                    interceptors.remove(interceptor);
073                }
074            }
075        }
076    }