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JacksonDecoder.java
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53 lines (47 loc) · 1.67 KB
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/*
* Copyright 2013 Netflix, Inc.
*
* 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 feign.jackson;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.RuntimeJsonMappingException;
import feign.Response;
import feign.codec.Decoder;
import java.io.IOException;
import java.io.Reader;
import java.lang.reflect.Type;
public class JacksonDecoder implements Decoder {
private final ObjectMapper mapper;
public JacksonDecoder() {
this(new ObjectMapper().configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false));
}
public JacksonDecoder(ObjectMapper mapper) {
this.mapper = mapper;
}
@Override public Object decode(Response response, Type type) throws IOException {
if (response.body() == null) {
return null;
}
Reader reader = response.body().asReader();
try {
return mapper.readValue(reader, mapper.constructType(type));
} catch (RuntimeJsonMappingException e) {
if (e.getCause() != null && e.getCause() instanceof IOException) {
throw IOException.class.cast(e.getCause());
}
throw e;
}
}
}