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/*
 * Copyright (C) 2017-2017 DataStax 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 com.datastax.oss.simulacron.protocol.json;

import com.datastax.oss.protocol.internal.Message;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.SerializerProvider;
import java.io.IOException;

public abstract class MessageSerializer extends JsonSerializer {
  @Override
  public void serialize(
      T message, JsonGenerator jsonGenerator, SerializerProvider serializerProvider)
      throws IOException {
    jsonGenerator.writeStartObject(message);
    serializeInner(message, jsonGenerator, serializerProvider);
    serializeMessage(message, jsonGenerator, serializerProvider);
    jsonGenerator.writeEndObject();
  }

  public abstract void serializeMessage(
      T message, JsonGenerator jsonGenerator, SerializerProvider serializerProvider)
      throws IOException;

  void serializeInner(T message, JsonGenerator jsonGenerator, SerializerProvider serializerProvider)
      throws IOException {
    jsonGenerator.writeObjectField("type", message.getClass().getSimpleName().toUpperCase());
    jsonGenerator.writeObjectField("opcode", message.opcode);
    jsonGenerator.writeObjectField("is_response", message.isResponse);
  }
}