001/*
002 * Copyright 2018 the original author or authors.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *       https://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.springframework.batch.item.json;
018
019import com.fasterxml.jackson.core.JsonProcessingException;
020import com.fasterxml.jackson.databind.ObjectMapper;
021
022import org.springframework.batch.item.ItemStreamException;
023
024/**
025 * A json object marshaller that uses <a href="https://github.com/FasterXML/jackson">Jackson</a>
026 * to marshal an object into a json representation.
027 *
028 * @param <T> type of objects to marshal
029 * @author Mahmoud Ben Hassine
030 * @since 4.1
031 */
032public class JacksonJsonObjectMarshaller<T> implements JsonObjectMarshaller<T> {
033
034        private ObjectMapper objectMapper = new ObjectMapper();
035
036        /**
037         * Set the {@link ObjectMapper} to use.
038         * @param objectMapper to use
039         */
040        public void setObjectMapper(ObjectMapper objectMapper) {
041                this.objectMapper = objectMapper;
042        }
043
044        @Override
045        public String marshal(T item)  {
046                try {
047                        return objectMapper.writeValueAsString(item);
048                } catch (JsonProcessingException e) {
049                        throw new ItemStreamException("Unable to marshal object " + item + " to Json", e);
050                }
051        }
052}