/*
* Copyright 2012-2015 org.opencloudb.
*
* 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 org.opencloudb.server.parser;
import org.opencloudb.parser.util.ParseUtil;
/**
* @author mycat
*/
public final class ServerParseStart {
public static final int OTHER = -1;
public static final int TRANSACTION = 1;
public static int parse(String stmt, int offset) {
int i = offset;
for (; i < stmt.length(); i++) {
switch (stmt.charAt(i)) {
case ' ':
continue;
case '/':
case '#':
i = ParseUtil.comment(stmt, i);
continue;
case 'T':
case 't':
return transactionCheck(stmt, i);
default:
return OTHER;
}
}
return OTHER;
}
// START TRANSACTION
static int transactionCheck(String stmt, int offset) {
if (stmt.length() > offset + "ransaction".length()) {
char c1 = stmt.charAt(++offset);
char c2 = stmt.charAt(++offset);
char c3 = stmt.charAt(++offset);
char c4 = stmt.charAt(++offset);
char c5 = stmt.charAt(++offset);
char c6 = stmt.charAt(++offset);
char c7 = stmt.charAt(++offset);
char c8 = stmt.charAt(++offset);
char c9 = stmt.charAt(++offset);
char c10 = stmt.charAt(++offset);
if ((c1 == 'R' || c1 == 'r') && (c2 == 'A' || c2 == 'a') && (c3 == 'N' || c3 == 'n')
&& (c4 == 'S' || c4 == 's') && (c5 == 'A' || c5 == 'a') && (c6 == 'C' || c6 == 'c')
&& (c7 == 'T' || c7 == 't') && (c8 == 'I' || c8 == 'i') && (c9 == 'O' || c9 == 'o')
&& (c10 == 'N' || c10 == 'n')
&& (stmt.length() == ++offset || ParseUtil.isEOF(stmt.charAt(offset)))) {
return TRANSACTION;
}
}
return OTHER;
}
}