/**
* <pre>
* This program is free software; you can redistribute it and/or modify it under the terms of
* the GNU AFFERO GENERAL PUBLIC LICENSE as published by the Free Software Foundation; either version 3 of the License,
* or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU AFFERO GENERAL PUBLIC LICENSE for more details.
* You should have received a copy of the GNU AFFERO GENERAL PUBLIC LICENSE along with this program;
* if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
* </pre.
*/
package com.meidusa.amoeba.mysql.net.packet;
import java.io.UnsupportedEncodingException;
import com.meidusa.amoeba.net.packet.AbstractPacketBuffer;
/**
* <pre>
* A "result packet" is a packet that goes from the server to the client in response to a Client Authentication Packet or Command Packet.
* To distinguish between the types of result packets,
* a client must look at the first byte in the packet.
* We will call this byte "field_count" in the description of each individual package,
* although it goes by several names.
* </pre>
*
*<pre>
* Type Of Result Packet Hexadecimal Value Of First Byte (field_count)
* --------------------- ---------------------------------------------
*
* OK Packet 00
* Error Packet ff
* Result Set Packet 1-250 (first byte of Length-Coded Binary)
* Field Packet 1-250 ("")
* Row Data Packet 1-250 ("")
* EOF Packet fe
* </pre>
*
* @author <a href=mailto:piratebase@sina.com>Struct chen</a>
*/
public abstract class AbstractResultPacket extends AbstractPacket {
public static final byte PACKET_TYPE_OK = 0x00;
public static final byte PACKET_TYPE_ERROR = (byte) 0xff;
public static final byte PACKET_TYPE_EOF = (byte) 0xfe;
public byte resultPacketType;
@Override
public void init(AbstractPacketBuffer buffer) {
super.init(buffer);
resultPacketType = buffer.readByte();
}
@Override
protected void write2Buffer(AbstractPacketBuffer buffer) throws UnsupportedEncodingException {
super.write2Buffer(buffer);
buffer.writeByte(resultPacketType);
}
@Override
protected int calculatePacketSize() {
int packLength = super.calculatePacketSize();
packLength += 1;
return packLength;
}
}