/*
* Copyright 1999-2012 Alibaba Group.
*
* 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 com.alibaba.cobar.server.handler;
import com.alibaba.cobar.parser.util.ParseUtil;
import com.alibaba.cobar.server.ServerConnection;
import com.alibaba.cobar.server.parser.ServerParse;
import com.alibaba.cobar.server.parser.ServerParseSelect;
import com.alibaba.cobar.server.response.SelectDatabase;
import com.alibaba.cobar.server.response.SelectIdentity;
import com.alibaba.cobar.server.response.SelectLastInsertId;
import com.alibaba.cobar.server.response.SelectUser;
import com.alibaba.cobar.server.response.SelectVersion;
import com.alibaba.cobar.server.response.SelectVersionComment;
/**
* @author xianmao.hexm
*/
public final class SelectHandler {
public static void handle(String stmt, ServerConnection c, int offs) {
int offset = offs;
switch (ServerParseSelect.parse(stmt, offs)) {
case ServerParseSelect.VERSION_COMMENT:
SelectVersionComment.response(c);
break;
case ServerParseSelect.DATABASE:
SelectDatabase.response(c);
break;
case ServerParseSelect.USER:
SelectUser.response(c);
break;
case ServerParseSelect.VERSION:
SelectVersion.response(c);
break;
case ServerParseSelect.LAST_INSERT_ID:
// offset = ParseUtil.move(stmt, 0, "select".length());
loop: for (; offset < stmt.length(); ++offset) {
switch (stmt.charAt(offset)) {
case ' ':
continue;
case '/':
case '#':
offset = ParseUtil.comment(stmt, offset);
continue;
case 'L':
case 'l':
break loop;
}
}
offset = ServerParseSelect.indexAfterLastInsertIdFunc(stmt, offset);
offset = ServerParseSelect.skipAs(stmt, offset);
SelectLastInsertId.response(c, stmt, offset);
break;
case ServerParseSelect.IDENTITY:
// offset = ParseUtil.move(stmt, 0, "select".length());
loop: for (; offset < stmt.length(); ++offset) {
switch (stmt.charAt(offset)) {
case ' ':
continue;
case '/':
case '#':
offset = ParseUtil.comment(stmt, offset);
continue;
case '@':
break loop;
}
}
int indexOfAtAt = offset;
offset += 2;
offset = ServerParseSelect.indexAfterIdentity(stmt, offset);
String orgName = stmt.substring(indexOfAtAt, offset);
offset = ServerParseSelect.skipAs(stmt, offset);
SelectIdentity.response(c, stmt, offset, orgName);
break;
default:
c.execute(stmt, ServerParse.SELECT);
}
}
}