gedi.remote.codec.NumberEncoder.java Source code

Introduction

Here is the source code for gedi.remote.codec.NumberEncoder.java

Source

/**
 * 
 *    Copyright 2017 Florian Erhard
 *
 *   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 gedi.remote.codec;

import java.util.logging.Level;
import java.util.logging.Logger;

import gedi.util.FileUtils;
import gedi.util.io.randomaccess.serialization.BinarySerializable;
import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.MessageToByteEncoder;

/**
 * Encoded as follows:
 * int (total size in bytes)
 * int (length of classname)
 * byte[] (classname)
 * buffer data
 * @author erhard
 *
 */
public class NumberEncoder extends MessageToByteEncoder<Number> {

    private static final Logger log = Logger.getLogger(NumberEncoder.class.getName());

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        log.log(Level.SEVERE, "NumberEncoder caught exception!", cause);
    }

    public NumberEncoder() {
        super(Number.class);
    }

    @Override
    protected void encode(ChannelHandlerContext ctx, Number msg, ByteBuf out) throws Exception {
        if (msg instanceof Byte) {
            out.writeInt(Integer.BYTES + 1 + Byte.BYTES);
            out.writeInt(1);
            out.writeByte('B');
            out.writeByte(msg.byteValue());
        } else if (msg instanceof Short) {
            out.writeInt(Integer.BYTES + 1 + Short.BYTES);
            out.writeInt(1);
            out.writeByte('S');
            out.writeShort(msg.shortValue());
        } else if (msg instanceof Integer) {
            out.writeInt(Integer.BYTES + 1 + Integer.BYTES);
            out.writeInt(1);
            out.writeByte('I');
            out.writeInt(msg.intValue());
        } else if (msg instanceof Long) {
            out.writeInt(Integer.BYTES + 1 + Long.BYTES);
            out.writeInt(1);
            out.writeByte('L');
            out.writeLong(msg.longValue());
        } else if (msg instanceof Float) {
            out.writeInt(Integer.BYTES + 1 + Float.BYTES);
            out.writeInt(1);
            out.writeByte('F');
            out.writeFloat(msg.floatValue());
        } else if (msg instanceof Double) {
            out.writeInt(Integer.BYTES + 1 + Double.BYTES);
            out.writeInt(1);
            out.writeByte('D');
            out.writeDouble(msg.doubleValue());
        } else
            throw new RuntimeException("Could not encode number " + msg.getClass().getName());

    }

}