org.springframework.kafka.support.MimeTypeJsonDeserializer Maven / Gradle / Ivy
/*
* Copyright 2017 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
*
* http://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.kafka.support;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import org.springframework.util.MimeType;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.deser.std.StdNodeBasedDeserializer;
import com.fasterxml.jackson.databind.type.TypeFactory;
/**
* {@link MimeType} deserializer.
*
* @author Gary Russell
* @author Artem Bilan
*
* @since 1.3
*
*/
public class MimeTypeJsonDeserializer extends StdNodeBasedDeserializer {
private static final long serialVersionUID = 1L;
private final ObjectMapper mapper;
public MimeTypeJsonDeserializer(ObjectMapper mapper) {
super(MimeType.class);
this.mapper = mapper;
}
@Override
public MimeType convert(JsonNode root, DeserializationContext ctxt) throws IOException {
JsonNode type = root.get("type");
JsonNode subType = root.get("subtype");
JsonNode parameters = root.get("parameters");
Map params = this.mapper.readValue(parameters.traverse(),
TypeFactory.defaultInstance().constructMapType(HashMap.class, String.class, String.class));
return new MimeType(type.asText(), subType.asText(), params);
}
}