/*
* Copyright 2008-2108 amoeba.meidusa.com
*
* 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.
*/
package com.meidusa.amoeba.mysql.filter;
import java.util.Iterator;
import java.util.List;
import com.meidusa.amoeba.mysql.net.MysqlClientConnection;
/**
*
* @author <a href=mailto:piratebase@sina.com>Struct chen</a>
*
*/
public abstract class PacketFilterInvocation implements FilterInvocation {
private Iterator<IOFilter> filters;
private byte[] byteBuffer;
private Result resultCode;
private boolean filted;
private MysqlClientConnection connection;
private byte[] resultBuffer;
public boolean isFilted() {
return filted;
}
public PacketFilterInvocation(List<IOFilter> filterList,MysqlClientConnection conn,byte[] byteBuffer){
filters = filterList.iterator();
this.byteBuffer = byteBuffer;
this.connection = conn;
}
public void invoke() {
if(filted) {
throw new IllegalStateException("FilterInvocation has already invoked");
}
if(resultCode == null){
if(filters != null && filters.hasNext()) {
IOFilter filter = (IOFilter) filters.next();
try{
try{
filter.startFiltrate();
resultCode = filter.doFilter(this);
resultBuffer = filter.getFiltedResult();
}finally{
filter.finishFiltrate();
}
}finally{
invoke();
}
}else {
resultCode = doProcess();
}
}else{
if(resultCode == Result.RETURN){
if(resultBuffer != null){
connection.postMessage(resultBuffer);
}
}else if(resultCode == FilterInvocation.Result.QUIT){
connection.postClose(null);
}
}
if(!filted){
filted = true;
}
}
public Result getResultCode() {
return resultCode;
}
public byte[] getByteBuffer() {
return byteBuffer;
}
public void setByteBuffer(byte[] byteBuffer) {
this.byteBuffer = byteBuffer;
}
protected abstract Result doProcess();
public MysqlClientConnection getConnection() {
return connection;
}
}