/*
* 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 fm.liu.timo.server.parser;
import fm.liu.timo.parser.util.ParseUtil;
/**
* @author xianmao.hexm 2011-5-7 下午01:23:06
*/
public final class ServerParseShow {
public static final int OTHER = -1;
public static final int DATABASES = 1;
public static final int DATASOURCES = 2;
public static final int TIMO_STATUS = 3;
public static final int TIMO_CLUSTER = 4;
public static final int TABLES = 5;
public static final int FULL_TABLES = 6;
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 'F':
case 'f':
return fullCheck(stmt, i);
case 'T':
case 't':
return tCheck(stmt, i);
case 'D':
case 'd':
return dataCheck(stmt, i);
default:
return OTHER;
}
}
return OTHER;
}
// SHOW FULL TABLES
private static int fullCheck(String stmt, int offset) {
if (stmt.length() > offset + "ull tables".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 == 'U' || c1 == 'u') && (c2 == 'L' || c2 == 'l') && (c3 == 'L' || c3 == 'l')
&& (c4 == ' ') && (c5 == 'T' || c5 == 't') && (c6 == 'A' || c6 == 'a')
&& (c7 == 'B' || c7 == 'b') && (c8 == 'L' || c8 == 'l')
&& (c9 == 'E' || c9 == 'e') && (c10 == 'S' || c10 == 's')
&& (stmt.length() == ++offset || ParseUtil.isEOF(stmt.charAt(offset)))) {
return FULL_TABLES;
}
}
return OTHER;
}
private static int tCheck(String stmt, int offset) {
if (stmt.length() > offset + 1) {
switch (stmt.charAt(++offset)) {
case 'A':
case 'a':
return blesCheck(stmt, offset);
case 'I':
case 'i':
return moCheck(stmt, offset);
default:
return OTHER;
}
}
return OTHER;
}
// SHOW TABLES
private static int blesCheck(String stmt, int offset) {
if (stmt.length() > offset + "bles".length()) {
char c1 = stmt.charAt(++offset);
char c2 = stmt.charAt(++offset);
char c3 = stmt.charAt(++offset);
char c4 = stmt.charAt(++offset);
if ((c1 == 'B' || c1 == 'b') && (c2 == 'L' || c2 == 'l') && (c3 == 'E' || c3 == 'e')
&& (c4 == 'S' || c4 == 's')
&& (stmt.length() == ++offset || ParseUtil.isEOF(stmt.charAt(offset)))) {
return TABLES;
}
}
return OTHER;
}
// SHOW TIMO_
static int moCheck(String stmt, int offset) {
if (stmt.length() > offset + "mo_?".length()) {
char c1 = stmt.charAt(++offset);
char c2 = stmt.charAt(++offset);
char c3 = stmt.charAt(++offset);
if ((c1 == 'M' || c1 == 'm') && (c2 == 'O' || c2 == 'o') && (c3 == '_')) {
switch (stmt.charAt(++offset)) {
case 'S':
case 's':
return showTimoStatus(stmt, offset);
case 'C':
case 'c':
return showTimoCluster(stmt, offset);
default:
return OTHER;
}
}
}
return OTHER;
}
// SHOW TIMO_STATUS
static int showTimoStatus(String stmt, int offset) {
if (stmt.length() > offset + "tatus".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 == 't' || c1 == 'T') && (c2 == 'a' || c2 == 'A') && (c3 == 't' || c3 == 'T')
&& (c4 == 'u' || c4 == 'U') && (c5 == 's' || c5 == 'S')
&& (stmt.length() == ++offset || ParseUtil.isEOF(stmt.charAt(offset)))) {
return TIMO_STATUS;
}
}
return OTHER;
}
// SHOW Timo_CLUSTER
static int showTimoCluster(String stmt, int offset) {
if (stmt.length() > offset + "luster".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);
if ((c1 == 'L' || c1 == 'l') && (c2 == 'U' || c2 == 'u') && (c3 == 'S' || c3 == 's')
&& (c4 == 'T' || c4 == 't') && (c5 == 'E' || c5 == 'e')
&& (c6 == 'R' || c6 == 'r')
&& (stmt.length() == ++offset || ParseUtil.isEOF(stmt.charAt(offset)))) {
return TIMO_CLUSTER;
}
}
return OTHER;
}
// SHOW DATA
static int dataCheck(String stmt, int offset) {
if (stmt.length() > offset + "ata?".length()) {
char c1 = stmt.charAt(++offset);
char c2 = stmt.charAt(++offset);
char c3 = stmt.charAt(++offset);
if ((c1 == 'A' || c1 == 'a') && (c2 == 'T' || c2 == 't') && (c3 == 'A' || c3 == 'a')) {
switch (stmt.charAt(++offset)) {
case 'B':
case 'b':
return showDatabases(stmt, offset);
case 'S':
case 's':
return showDataSources(stmt, offset);
default:
return OTHER;
}
}
}
return OTHER;
}
// SHOW DATABASES
static int showDatabases(String stmt, int offset) {
if (stmt.length() > offset + "ases".length()) {
char c1 = stmt.charAt(++offset);
char c2 = stmt.charAt(++offset);
char c3 = stmt.charAt(++offset);
char c4 = stmt.charAt(++offset);
if ((c1 == 'A' || c1 == 'a') && (c2 == 'S' || c2 == 's') && (c3 == 'E' || c3 == 'e')
&& (c4 == 'S' || c4 == 's')
&& (stmt.length() == ++offset || ParseUtil.isEOF(stmt.charAt(offset)))) {
return DATABASES;
}
}
return OTHER;
}
// SHOW DATASOURCES
static int showDataSources(String stmt, int offset) {
if (stmt.length() > offset + "ources".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);
if ((c1 == 'O' || c1 == 'o') && (c2 == 'U' || c2 == 'u') && (c3 == 'R' || c3 == 'r')
&& (c4 == 'C' || c4 == 'c') && (c5 == 'E' || c5 == 'e')
&& (c6 == 'S' || c6 == 's')
&& (stmt.length() == ++offset || ParseUtil.isEOF(stmt.charAt(offset)))) {
return DATASOURCES;
}
}
return OTHER;
}
}