com.baxter.githubexplore.network.JacksonConverterFactory.java Source code

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Here is the source code for com.baxter.githubexplore.network.JacksonConverterFactory.java

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package com.baxter.githubexplore.network;

/*
 * Copyright (C) 2015 Square, 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.
 */

import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.ObjectReader;
import com.fasterxml.jackson.databind.ObjectWriter;

import java.lang.annotation.Annotation;
import java.lang.reflect.Type;

import okhttp3.RequestBody;
import okhttp3.ResponseBody;
import retrofit2.Converter;
import retrofit2.Retrofit;

/**
 * A {@linkplain Converter.Factory converter} which uses Jackson.
 * <p>
 * Because Jackson is so flexible in the types it supports, this converter assumes that it can
 * handle all types. If you are mixing JSON serialization with something else (such as protocol
 * buffers), you must {@linkplain Retrofit.Builder#addConverterFactory(Converter.Factory) add this
 * instance} last to allow the other converters a chance to see their types.
 */
public final class JacksonConverterFactory extends Converter.Factory {
    /** Create an instance using a default {@link ObjectMapper} instance for conversion. */
    public static JacksonConverterFactory create() {
        return create(new ObjectMapper());
    }

    /** Create an instance using {@code mapper} for conversion. */
    public static JacksonConverterFactory create(ObjectMapper mapper) {
        return new JacksonConverterFactory(mapper);
    }

    private final ObjectMapper mapper;

    private JacksonConverterFactory(ObjectMapper mapper) {
        if (mapper == null)
            throw new NullPointerException("mapper == null");
        this.mapper = mapper;
    }

    @Override
    public Converter<ResponseBody, ?> responseBodyConverter(Type type, Annotation[] annotations,
            Retrofit retrofit) {
        JavaType javaType = mapper.getTypeFactory().constructType(type);
        ObjectReader reader = mapper.reader(javaType);
        return new JacksonResponseBodyConverter<>(reader);
    }

    @Override
    public Converter<?, RequestBody> requestBodyConverter(Type type, Annotation[] annotations, Retrofit retrofit) {
        JavaType javaType = mapper.getTypeFactory().constructType(type);
        ObjectWriter writer = mapper.writerWithType(javaType);
        return new JacksonRequestBodyConverter<>(writer);
    }
}