com.facebook.airlift.json.smile.SmileCodecFactory Maven / Gradle / Ivy

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/*
 * 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 com.facebook.airlift.json.smile;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.common.annotations.Beta;
import com.google.common.reflect.TypeParameter;
import com.google.common.reflect.TypeToken;

import javax.inject.Inject;
import javax.inject.Provider;

import java.lang.reflect.Type;
import java.util.List;
import java.util.Map;

import static java.util.Objects.requireNonNull;

@Beta
public class SmileCodecFactory
{
    private final Provider objectMapperProvider;

    public SmileCodecFactory()
    {
        this(new SmileObjectMapperProvider());
    }

    @Inject
    public SmileCodecFactory(@ForSmile Provider smileObjectMapperProvider)
    {
        this.objectMapperProvider = requireNonNull(smileObjectMapperProvider, "smileObjectMapperProvider is null");
    }

    public  SmileCodec smileCodec(Class type)
    {
        requireNonNull(type, "type is null");

        return new SmileCodec<>(createObjectMapper(), type);
    }

    public  SmileCodec smileCodec(Type type)
    {
        requireNonNull(type, "type is null");

        return new SmileCodec<>(createObjectMapper(), type);
    }

    public  SmileCodec smileCodec(TypeToken type)
    {
        requireNonNull(type, "type is null");

        return new SmileCodec<>(createObjectMapper(), type.getType());
    }

    public  SmileCodec> listSmileCodec(Class type)
    {
        requireNonNull(type, "type is null");

        Type listType = new TypeToken>() {}
                .where(new TypeParameter() {}, type)
                .getType();

        return new SmileCodec<>(createObjectMapper(), listType);
    }

    public  SmileCodec> listSmileCodec(SmileCodec type)
    {
        requireNonNull(type, "type is null");

        Type listType = new TypeToken>() {}
                .where(new TypeParameter() {}, type.getTypeToken())
                .getType();

        return new SmileCodec<>(createObjectMapper(), listType);
    }

    public  SmileCodec> mapSmileCodec(Class keyType, Class valueType)
    {
        requireNonNull(keyType, "keyType is null");
        requireNonNull(valueType, "valueType is null");

        Type mapType = new TypeToken>() {}
                .where(new TypeParameter() {}, keyType)
                .where(new TypeParameter() {}, valueType)
                .getType();

        return new SmileCodec<>(createObjectMapper(), mapType);
    }

    public  SmileCodec> mapSmileCodec(Class keyType, SmileCodec valueType)
    {
        requireNonNull(keyType, "keyType is null");
        requireNonNull(valueType, "valueType is null");

        Type mapType = new TypeToken>() {}
                .where(new TypeParameter() {}, keyType)
                .where(new TypeParameter() {}, valueType.getTypeToken())
                .getType();

        return new SmileCodec<>(createObjectMapper(), mapType);
    }

    private ObjectMapper createObjectMapper()
    {
        return objectMapperProvider.get();
    }
}