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/*
 * Copyright 2017 Huawei Technologies Co., Ltd
 *
 * 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 io.servicecomb.codec.protobuf.jackson;

import java.lang.reflect.Constructor;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.fasterxml.jackson.core.FormatSchema;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.ObjectWriter;

@SuppressWarnings("unchecked")
public class CseObjectWriter extends ObjectWriter {

    private static final Logger LOGGER = LoggerFactory.getLogger(CseObjectWriter.class);

    private static final long serialVersionUID = -6435897284942268001L;

    private static Constructor prefetchConstructor;
    static {
        prefetchConstructor = (Constructor) Prefetch.class.getDeclaredConstructors()[0];
        prefetchConstructor.setAccessible(true);
    }

    private static Prefetch createPrefetch(JsonSerializer valueSerializer) {
        try {
            return prefetchConstructor.newInstance(null, valueSerializer, null);
        } catch (Exception e) {
            LOGGER.error("create prefetch error:", e);
        }
        return null;
    }

    public CseObjectWriter(ObjectWriter base, FormatSchema schema, JsonSerializer valueSerializer) {

        super(base, base.getConfig(), new GeneratorSettings(null, schema, null, null),
                createPrefetch(valueSerializer));
    }

}