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.servicemix.camel.util;
018    
019    import java.io.Serializable;
020    import java.util.Collection;
021    import java.util.Map;
022    
023    import org.apache.camel.spi.HeaderFilterStrategy;
024    
025    /**
026     * {@link org.apache.camel.spi.HeaderFilterStrategy} that filters out non-serializable values:
027     * <ul>
028     * <li>classes that don't implement {@link java.io.Serializable}</li>
029     * <li>{@link java.util.Collection}s</li>
030     * <li>{@link java.util.Map}s</li>
031     * </ul>
032     */
033    public class BasicSerializationHeaderFilterStrategy implements HeaderFilterStrategy {
034    
035        public boolean applyFilterToCamelHeaders(String s, Object o) {
036            return doApplyFilter(o);
037        }
038    
039        public boolean applyFilterToExternalHeaders(String s, Object o) {
040            return doApplyFilter(o);
041        }
042    
043        private boolean doApplyFilter(Object o) {
044            return !(o instanceof Serializable) || (o instanceof Map) || (o instanceof Collection);
045        }
046    }