com.github.tddts.jet.config.spring.factory.GsonFactoryBean.java Source code

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Here is the source code for com.github.tddts.jet.config.spring.factory.GsonFactoryBean.java

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/*
 * Copyright 2018 Tigran Dadaiants
 *
 * 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.github.tddts.jet.config.spring.factory;

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonDeserializer;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.beans.factory.InitializingBean;

import java.util.Map;

/**
 * {@code GsonFactoryBean} is a {@link FactoryBean} for {@link Gson}.
 * Can be provided with custom {@link JsonDeserializer} implementations.
 *
 * @author Tigran_Dadaiants dtkcommon@gmail.com
 */
public class GsonFactoryBean implements FactoryBean<Gson>, InitializingBean {

    private Gson gson;

    private Map<Class<?>, Class<JsonDeserializer<?>>> deserializers;

    public void setDeserializers(Map<Class<?>, Class<JsonDeserializer<?>>> deserializers) {
        this.deserializers = deserializers;
    }

    @Override
    public Gson getObject() throws Exception {
        return gson;
    }

    @Override
    public Class<?> getObjectType() {
        return Gson.class;
    }

    @Override
    public boolean isSingleton() {
        return true;
    }

    @Override
    public void afterPropertiesSet() throws Exception {
        GsonBuilder gsonBuilder = new GsonBuilder();

        if (deserializers != null) {
            for (Class<?> typeClass : deserializers.keySet()) {
                gsonBuilder.registerTypeAdapter(typeClass, deserializers.get(typeClass).newInstance());
            }
        }

        gson = gsonBuilder.create();
    }
}