feign.jackson.JacksonDecoder.java Source code

Introduction

Here is the source code for feign.jackson.JacksonDecoder.java

Source

/*
 * 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.InputStream;
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;
        }
        InputStream inputStream = response.body().asInputStream();
        try {
            return mapper.readValue(inputStream, mapper.constructType(type));
        } catch (RuntimeJsonMappingException e) {
            if (e.getCause() != null && e.getCause() instanceof IOException) {
                throw IOException.class.cast(e.getCause());
            }
            throw e;
        }
    }
}