/*
 * Copyright 2002-2018 the original author or authors.
 *
 * 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 org.springframework.boot.autoconfigure.web.reactive;

import com.fasterxml.jackson.databind.ObjectMapper;

import org.springframework.boot.autoconfigure.web.reactive.AbstractCodecInitializer;
import org.springframework.context.ApplicationContextInitializer;
import org.springframework.context.support.GenericApplicationContext;
import org.springframework.http.codec.CodecConfigurer;
import org.springframework.http.codec.ServerSentEventHttpMessageWriter;
import org.springframework.http.codec.json.Jackson2JsonDecoder;
import org.springframework.http.codec.json.Jackson2JsonEncoder;

/**
 * {@link ApplicationContextInitializer} adapter for registering Jackson JSON codecs.
 */
public class JacksonJsonCodecInitializer extends AbstractCodecInitializer {

	public JacksonJsonCodecInitializer(boolean isClientCodec) {
		super(isClientCodec);
	}

	@Override
	protected void register(GenericApplicationContext context, CodecConfigurer configurer) {
		ObjectMapper mapper = context.getBean(ObjectMapper.class);
		Jackson2JsonEncoder encoder = new Jackson2JsonEncoder(mapper);
		configurer.customCodecs().decoder(new Jackson2JsonDecoder(mapper));
		configurer.customCodecs().encoder(encoder);
		configurer.customCodecs().writer(new ServerSentEventHttpMessageWriter(encoder));
	}
}
