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.component.jackson;
018    
019    import java.io.InputStream;
020    import java.io.OutputStream;
021    import java.util.HashMap;
022    import java.util.Map;
023    
024    import org.apache.camel.Exchange;
025    import org.apache.camel.spi.DataFormat;
026    import org.codehaus.jackson.map.ObjectMapper;
027    
028    /**
029     * A <a href="http://camel.apache.org/data-format.html">data format</a> ({@link DataFormat})
030     * using <a href="http://jackson.codehaus.org/">Jackson</a> to marshal to and from JSON.
031     */
032    public class JacksonDataFormat implements DataFormat {
033    
034        private final ObjectMapper objectMapper;
035        private Class<?> unmarshalType;
036    
037        /**
038         * Use the default Jackson {@link ObjectMapper} and {@link Map}
039         */
040        public JacksonDataFormat() {
041            this(new ObjectMapper(), HashMap.class);
042        }
043    
044        /**
045         * Use the default Jackson {@link ObjectMapper} and with a custom
046         * unmarshal type
047         *
048         * @param unmarshalType the custom unmarshal type
049         */
050        public JacksonDataFormat(Class<?> unmarshalType) {
051            this(new ObjectMapper(), unmarshalType);
052        }
053    
054        /**
055         * Use a custom Jackson mapper and and unmarshal type
056         *
057         * @param mapper        the custom mapper
058         * @param unmarshalType the custom unmarshal type
059         */
060        public JacksonDataFormat(ObjectMapper mapper, Class<?> unmarshalType) {
061            this.objectMapper = mapper;
062            this.unmarshalType = unmarshalType;
063        }
064    
065        public void marshal(Exchange exchange, Object graph, OutputStream stream) throws Exception {
066            this.objectMapper.writeValue(stream, graph);
067        }
068    
069        public Object unmarshal(Exchange exchange, InputStream stream) throws Exception {
070            return this.objectMapper.readValue(stream, this.unmarshalType);
071        }
072    
073        // Properties
074        // -------------------------------------------------------------------------
075    
076        public Class<?> getUnmarshalType() {
077            return this.unmarshalType;
078        }
079    
080        public void setUnmarshalType(Class<?> unmarshalType) {
081            this.unmarshalType = unmarshalType;
082        }
083    
084        public ObjectMapper getObjectMapper() {
085            return this.objectMapper;
086        }
087    
088    }