spring-batch JacksonJsonObjectMarshaller 源码
spring-batch JacksonJsonObjectMarshaller 代码
文件路径：/spring-batch-infrastructure/src/main/java/org/springframework/batch/item/json/JacksonJsonObjectMarshaller.java
/*
* Copyright 2018-2021 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.batch.item.json;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.batch.item.ItemStreamException;
/**
* A json object marshaller that uses
* <a href="https://github.com/FasterXML/jackson">Jackson</a> to marshal an object into a
* json representation.
*
* @param <T> type of objects to marshal
* @author Mahmoud Ben Hassine
* @since 4.1
*/
public class JacksonJsonObjectMarshaller<T> implements JsonObjectMarshaller<T> {
private ObjectMapper objectMapper;
public JacksonJsonObjectMarshaller() {
this(new ObjectMapper());
}
public JacksonJsonObjectMarshaller(ObjectMapper objectMapper) {
this.objectMapper = objectMapper;
}
/**
* Set the {@link ObjectMapper} to use.
* @param objectMapper to use
* @see #JacksonJsonObjectMarshaller(ObjectMapper)
*/
public void setObjectMapper(ObjectMapper objectMapper) {
this.objectMapper = objectMapper;
}
@Override
public String marshal(T item) {
try {
return objectMapper.writeValueAsString(item);
}
catch (JsonProcessingException e) {
throw new ItemStreamException("Unable to marshal object " + item + " to Json", e);
}
}
}
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