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/**
 * Copyright 2018 Nikita Koksharov
 *
 * 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.redisson.codec;

import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;

import org.redisson.client.codec.Codec;
import org.redisson.client.handler.State;
import org.redisson.client.protocol.Decoder;
import org.redisson.client.protocol.Encoder;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufAllocator;
import io.netty.buffer.ByteBufInputStream;
import io.netty.buffer.ByteBufOutputStream;

/**
 *
 * @author Nikita Koksharov
 *
 */
public class SerializationCodec implements Codec {

    private final Decoder decoder = new Decoder() {
        @Override
        public Object decode(ByteBuf buf, State state) throws IOException {
            try {
                ByteBufInputStream in = new ByteBufInputStream(buf);
                ObjectInputStream inputStream;
                if (classLoader != null) {
                    inputStream = new CustomObjectInputStream(classLoader, in);
                } else {
                    inputStream = new ObjectInputStream(in);
                }
                return inputStream.readObject();
            } catch (IOException e) {
                throw e;
            } catch (Exception e) {
                throw new IOException(e);
            }
        }
    };

    private final Encoder encoder = new Encoder() {

        @Override
        public ByteBuf encode(Object in) throws IOException {
            ByteBuf out = ByteBufAllocator.DEFAULT.buffer();
            try {
                ByteBufOutputStream result = new ByteBufOutputStream(out);
                ObjectOutputStream outputStream = new ObjectOutputStream(result);
                outputStream.writeObject(in);
                outputStream.close();
                return result.buffer();
            } catch (IOException e) {
                out.release();
                throw e;
            }
        }
    };
    
    private final ClassLoader classLoader;

    public SerializationCodec() {
        this(null);
    }
    
    public SerializationCodec(ClassLoader classLoader) {
        this.classLoader = classLoader;
    }
    
    @Override
    public Decoder getMapValueDecoder() {
        return getValueDecoder();
    }

    @Override
    public Encoder getMapValueEncoder() {
        return getValueEncoder();
    }

    @Override
    public Decoder getMapKeyDecoder() {
        return getValueDecoder();
    }

    @Override
    public Encoder getMapKeyEncoder() {
        return getValueEncoder();
    }

    @Override
    public Decoder getValueDecoder() {
        return decoder;
    }

    @Override
    public Encoder getValueEncoder() {
        return encoder;
    }
    
    @Override
    public ClassLoader getClassLoader() {
        if (classLoader != null) {
            return classLoader;
        }
        return getClass().getClassLoader();
    }

}
 















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