spring JacksonJmxOperationResponseMapper 源码
springboot JacksonJmxOperationResponseMapper 代码
文件路径：/spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/jmx/JacksonJmxOperationResponseMapper.java
/*
* Copyright 2012-2019 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.boot.actuate.endpoint.jmx;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.ObjectMapper;
/**
* {@link JmxOperationResponseMapper} that delegates to a Jackson {@link ObjectMapper} to
* return a JSON response.
*
* @author Stephane Nicoll
* @since 2.0.0
*/
public class JacksonJmxOperationResponseMapper implements JmxOperationResponseMapper {
private final ObjectMapper objectMapper;
private final JavaType listType;
private final JavaType mapType;
public JacksonJmxOperationResponseMapper(ObjectMapper objectMapper) {
this.objectMapper = (objectMapper != null) ? objectMapper : new ObjectMapper();
this.listType = this.objectMapper.getTypeFactory().constructParametricType(List.class, Object.class);
this.mapType = this.objectMapper.getTypeFactory().constructParametricType(Map.class, String.class,
Object.class);
}
@Override
public Class<?> mapResponseType(Class<?> responseType) {
if (CharSequence.class.isAssignableFrom(responseType)) {
return String.class;
}
if (responseType.isArray() || Collection.class.isAssignableFrom(responseType)) {
return List.class;
}
return Map.class;
}
@Override
public Object mapResponse(Object response) {
if (response == null) {
return null;
}
if (response instanceof CharSequence) {
return response.toString();
}
if (response.getClass().isArray() || response instanceof Collection) {
return this.objectMapper.convertValue(response, this.listType);
}
return this.objectMapper.convertValue(response, this.mapType);
}
}
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- 本文标签： Java Spring Spring Boot
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