/*
* 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 org.opencloudb.parser;
import org.opencloudb.parser.util.ParseUtil;
/**
* @author mycat
* @author mycat
*/
public final class ManagerParse {
public static final int OTHER = -1;
public static final int SELECT = 1;
public static final int SET = 2;
public static final int SHOW = 3;
public static final int SWITCH = 4;
public static final int KILL_CONN = 5;
public static final int STOP = 6;
public static final int RELOAD = 7;
public static final int ROLLBACK = 8;
public static final int OFFLINE = 9;
public static final int ONLINE = 10;
public static final int CLEAR = 11;
public static final int CONFIGFILE = 12;
public static final int LOGFILE = 13;
public static int parse(String stmt) {
for (int i = 0; i < stmt.length(); i++) {
switch (stmt.charAt(i)) {
case ' ':
continue;
case '/':
case '#':
i = ParseUtil.comment(stmt, i);
continue;
case 'C':
case 'c':
return cCheck(stmt, i);
case 'F':
case 'f':
return fCheck(stmt, i);
case 'L':
case 'l':
return lCheck(stmt, i);
case 'S':
case 's':
return sCheck(stmt, i);
case 'K':
case 'k':
return kill(stmt, i);
case 'O':
case 'o':
return oCheck(stmt, i);
case 'R':
case 'r':
return rCheck(stmt, i);
default:
return OTHER;
}
}
return OTHER;
}
// show LOG check
private static int lCheck(String stmt, int offset) {
String thePart = stmt.substring(offset).toUpperCase();
if (thePart.startsWith("LOG @@")) {
return LOGFILE;
} else {
return OTHER;
}
}
// config file check
private static int fCheck(String stmt, int offset) {
String thePart = stmt.substring(offset).toUpperCase();
if (thePart.startsWith("FILE @@")) {
return CONFIGFILE;
}
return OTHER;
}
// CLEAR or config file
private static int cCheck(String stmt, int offset) {
if (stmt.length() > offset + "LEAR ".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);
if ((c1 == 'L' || c1 == 'l') && (c2 == 'E' || c2 == 'e')
&& (c3 == 'A' || c3 == 'a') && (c4 == 'R' || c4 == 'r')
&& (c5 == ' ' || c5 == '\t' || c5 == '\r' || c5 == '\n')) {
return (offset << 8) | CLEAR;
}
}
return OTHER;
}
private static int oCheck(String stmt, int offset) {
if (stmt.length() > ++offset) {
switch (stmt.charAt(offset)) {
case 'F':
case 'f':
return ofCheck(stmt, offset);
case 'N':
case 'n':
return onCheck(stmt, offset);
default:
return OTHER;
}
}
return OTHER;
}
private static int onCheck(String stmt, int offset) {
if (stmt.length() > offset + "line".length()) {
char c1 = stmt.charAt(++offset);
char c2 = stmt.charAt(++offset);
char c3 = stmt.charAt(++offset);
char c4 = stmt.charAt(++offset);
if ((c1 == 'l' || c1 == 'L')
&& (c2 == 'i' || c2 == 'I')
&& (c3 == 'n' || c3 == 'N')
&& (c4 == 'e' || c4 == 'E')
&& (stmt.length() == ++offset || ParseUtil.isEOF(stmt
.charAt(offset)))) {
return ONLINE;
}
}
return OTHER;
}
private static int ofCheck(String stmt, int offset) {
if (stmt.length() > offset + "fline".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);
if ((c1 == 'f' || c1 == 'F')
&& (c2 == 'l' || c2 == 'L')
&& (c3 == 'i' || c3 == 'I')
&& (c4 == 'n' || c4 == 'N')
&& (c5 == 'e' || c5 == 'E')
&& (stmt.length() == ++offset || ParseUtil.isEOF(stmt
.charAt(offset)))) {
return OFFLINE;
}
}
return OTHER;
}
private static int sCheck(String stmt, int offset) {
if (stmt.length() > ++offset) {
switch (stmt.charAt(offset)) {
case 'E':
case 'e':
return seCheck(stmt, offset);
case 'H':
case 'h':
return show(stmt, offset);
case 'W':
case 'w':
return swh(stmt, offset);
case 'T':
case 't':
return stop(stmt, offset);
default:
return OTHER;
}
}
return OTHER;
}
private static int seCheck(String stmt, int offset) {
if (stmt.length() > ++offset) {
switch (stmt.charAt(offset)) {
case 'L':
case 'l':
return select(stmt, offset);
case 'T':
case 't':
if (stmt.length() > ++offset) {
char c = stmt.charAt(offset);
if (c == ' ' || c == '\r' || c == '\n' || c == '\t'
|| c == '/' || c == '#') {
return SET;
}
}
return OTHER;
default:
return OTHER;
}
}
return OTHER;
}
private static int rCheck(String stmt, int offset) {
if (stmt.length() > ++offset) {
switch (stmt.charAt(offset)) {
case 'E':
case 'e':
return reload(stmt, offset);
case 'O':
case 'o':
return rollback(stmt, offset);
default:
return OTHER;
}
}
return OTHER;
}
// RELOAD' '
private static int reload(String stmt, int offset) {
if (stmt.length() > offset + 5) {
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);
if ((c1 == 'L' || c1 == 'l') && (c2 == 'O' || c2 == 'o')
&& (c3 == 'A' || c3 == 'a') && (c4 == 'D' || c4 == 'd')
&& (c5 == ' ' || c5 == '\t' || c5 == '\r' || c5 == '\n')) {
return (offset << 8) | RELOAD;
}
}
return OTHER;
}
// ROLLBACK' '
private static int rollback(String stmt, int offset) {
if (stmt.length() > offset + 7) {
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);
if ((c1 == 'L' || c1 == 'l') && (c2 == 'L' || c2 == 'l')
&& (c3 == 'B' || c3 == 'b') && (c4 == 'A' || c4 == 'a')
&& (c5 == 'C' || c5 == 'c') && (c6 == 'K' || c6 == 'k')
&& (c7 == ' ' || c7 == '\t' || c7 == '\r' || c7 == '\n')) {
return (offset << 8) | ROLLBACK;
}
}
return OTHER;
}
// SELECT' '
private static int select(String stmt, int offset) {
if (stmt.length() > offset + 4) {
char c1 = stmt.charAt(++offset);
char c2 = stmt.charAt(++offset);
char c3 = stmt.charAt(++offset);
char c4 = stmt.charAt(++offset);
if ((c1 == 'E' || c1 == 'e') && (c2 == 'C' || c2 == 'c')
&& (c3 == 'T' || c3 == 't')
&& (c4 == ' ' || c4 == '\t' || c4 == '\r' || c4 == '\n')) {
return (offset << 8) | SELECT;
}
}
return OTHER;
}
// SHOW' '
private static int show(String stmt, int offset) {
if (stmt.length() > offset + 3) {
char c1 = stmt.charAt(++offset);
char c2 = stmt.charAt(++offset);
char c3 = stmt.charAt(++offset);
if ((c1 == 'O' || c1 == 'o') && (c2 == 'W' || c2 == 'w')
&& (c3 == ' ' || c3 == '\t' || c3 == '\r' || c3 == '\n')) {
return (offset << 8) | SHOW;
}
}
return OTHER;
}
// SWITCH' '
private static int swh(String stmt, int offset) {
if (stmt.length() > offset + 5) {
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);
if ((c1 == 'I' || c1 == 'i') && (c2 == 'T' || c2 == 't')
&& (c3 == 'C' || c3 == 'c') && (c4 == 'H' || c4 == 'h')
&& (c5 == ' ' || c5 == '\t' || c5 == '\r' || c5 == '\n')) {
return (offset << 8) | SWITCH;
}
}
return OTHER;
}
// STOP' '
private static int stop(String stmt, int offset) {
if (stmt.length() > offset + 3) {
char c1 = stmt.charAt(++offset);
char c2 = stmt.charAt(++offset);
char c3 = stmt.charAt(++offset);
if ((c1 == 'O' || c1 == 'o') && (c2 == 'P' || c2 == 'p')
&& (c3 == ' ' || c3 == '\t' || c3 == '\r' || c3 == '\n')) {
return (offset << 8) | STOP;
}
}
return OTHER;
}
// KILL @
private static int kill(String stmt, int offset) {
if (stmt.length() > offset + 3) {
char c1 = stmt.charAt(++offset);
char c2 = stmt.charAt(++offset);
char c3 = stmt.charAt(++offset);
char c4 = stmt.charAt(++offset);
if ((c1 == 'I' || c1 == 'i') && (c2 == 'L' || c2 == 'l')
&& (c3 == 'L' || c3 == 'l')
&& (c4 == ' ' || c4 == '\t' || c4 == '\r' || c4 == '\n')) {
while (stmt.length() > ++offset) {
switch (stmt.charAt(offset)) {
case ' ':
case '\t':
case '\r':
case '\n':
continue;
case '@':
return killConnection(stmt, offset);
default:
return OTHER;
}
}
return OTHER;
}
}
return OTHER;
}
// KILL @@CONNECTION' ' XXXXXX
private static int killConnection(String stmt, int offset) {
if (stmt.length() > offset + "@CONNECTION ".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);
char c11 = stmt.charAt(++offset);
char c12 = stmt.charAt(++offset);
if ((c1 == '@')
&& (c2 == 'C' || c2 == 'c')
&& (c3 == 'O' || c3 == 'o')
&& (c4 == 'N' || c4 == 'n')
&& (c5 == 'N' || c5 == 'n')
&& (c6 == 'E' || c6 == 'e')
&& (c7 == 'C' || c7 == 'c')
&& (c8 == 'T' || c8 == 't')
&& (c9 == 'I' || c9 == 'i')
&& (c10 == 'O' || c10 == 'o')
&& (c11 == 'N' || c11 == 'n')
&& (c12 == ' ' || c12 == '\t' || c12 == '\r' || c12 == '\n')) {
while (stmt.length() > ++offset) {
switch (stmt.charAt(offset)) {
case ' ':
case '\t':
case '\r':
case '\n':
continue;
default:
return (offset << 8) | KILL_CONN;
}
}
}
}
return OTHER;
}
}