PacketUtil.java
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/*
* Copyright (c) 2013, OpenCloudDB/MyCAT and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software;Designed and Developed mainly by many Chinese
* opensource volunteers. you can redistribute it and/or modify it under the
* terms of the GNU General Public License version 2 only, as published by the
* Free Software Foundation.
*
* This code 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 General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Any questions about this component can be directed to it's project Web address
* https://code.google.com/p/opencloudb/.
*
*/
package io.mycat.backend.mysql;
import java.io.UnsupportedEncodingException;
import io.mycat.config.ErrorCode;
import io.mycat.net.mysql.BinaryPacket;
import io.mycat.net.mysql.ErrorPacket;
import io.mycat.net.mysql.FieldPacket;
import io.mycat.net.mysql.ResultSetHeaderPacket;
/**
* @author mycat
*/
public class PacketUtil {
private static final String CODE_PAGE_1252 = "Cp1252";
public static final ResultSetHeaderPacket getHeader(int fieldCount) {
ResultSetHeaderPacket packet = new ResultSetHeaderPacket();
packet.packetId = 1;
packet.fieldCount = fieldCount;
return packet;
}
public static byte[] encode(String src, String charset) {
if (src == null) {
return null;
}
try {
return src.getBytes(charset);
} catch (UnsupportedEncodingException e) {
return src.getBytes();
}
}
public static final FieldPacket getField(String name, String orgName, int type) {
FieldPacket packet = new FieldPacket();
packet.charsetIndex = CharsetUtil.getIndex(CODE_PAGE_1252);
packet.name = encode(name, CODE_PAGE_1252);
packet.orgName = encode(orgName, CODE_PAGE_1252);
packet.type = (byte) type;
return packet;
}
public static final FieldPacket getField(String name, int type) {
FieldPacket packet = new FieldPacket();
packet.charsetIndex = CharsetUtil.getIndex(CODE_PAGE_1252);
packet.name = encode(name, CODE_PAGE_1252);
packet.type = (byte) type;
return packet;
}
public static final ErrorPacket getShutdown() {
ErrorPacket error = new ErrorPacket();
error.packetId = 1;
error.errno = ErrorCode.ER_SERVER_SHUTDOWN;
error.message = "The server has been shutdown".getBytes();
return error;
}
public static final FieldPacket getField(BinaryPacket src, String fieldName) {
FieldPacket field = new FieldPacket();
field.read(src);
field.name = encode(fieldName, CODE_PAGE_1252);
field.packetLength = field.calcPacketSize();
return field;
}
}