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.Processor;
023    import org.apache.camel.converter.stream.StreamCache;
024    import org.apache.camel.model.InterceptorRef;
025    import org.apache.camel.model.InterceptorType;
026    import org.apache.camel.processor.Interceptor;
027    
028    /**
029     * {@link Interceptor} that converts a message into a re-readable format
030     */
031    public class StreamCachingInterceptor extends Interceptor {
032    
033        public StreamCachingInterceptor() {
034            super();
035            setInterceptorLogic(new Processor() {
036                public void process(Exchange exchange) throws Exception {
037                    StreamCache newBody = exchange.getIn().getBody(StreamCache.class);
038                    if (newBody != null) {
039                        newBody.reset();
040                        exchange.getIn().setBody(newBody);
041                    }
042                    proceed(exchange);
043                }
044            });
045        }
046    
047        public StreamCachingInterceptor(Processor processor) {
048            this();
049            setProcessor(processor);
050        }
051    
052        @Override
053        public String toString() {
054            return "StreamCachingInterceptor";
055        }
056    
057        /**
058         * Remove the {@link StreamCachingInterceptor} type of interceptor from the given list of interceptors
059         *
060         * @param interceptors the list of interceptors
061         */
062        public static void noStreamCaching(List<InterceptorType> interceptors) {
063            for (int i = 0; i < interceptors.size(); i++) {
064                InterceptorType interceptor = interceptors.get(i);
065                if (interceptor instanceof InterceptorRef
066                    && ((InterceptorRef)interceptor).getInterceptor() instanceof StreamCachingInterceptor) {
067                    interceptors.remove(interceptor);
068                }
069            }
070        }
071    }