/* * 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.parser; import org.opencloudb.parser.util.ParseUtil; /** * @author mycat */ public final class ManagerParseSelect { public static final int OTHER = -1; public static final int VERSION_COMMENT = 1; public static final int SESSION_AUTO_INCREMENT = 2; private static final char[] _VERSION_COMMENT = "VERSION_COMMENT".toCharArray(); private static final char[] _SESSION_AUTO_INCREMENT = "SESSION.AUTO_INCREMENT_INCREMENT".toCharArray(); 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 '@': return select2Check(stmt, i); default: return OTHER; } } return OTHER; } static int select2Check(String stmt, int offset) { if (stmt.length() > ++offset && stmt.charAt(offset) == '@') { if (stmt.length() > ++offset) { switch (stmt.charAt(offset)) { case 'S': case 's': return select2SCheck(stmt, offset); case 'V': case 'v': return select2VCheck(stmt, offset); default: return OTHER; } } } return OTHER; } // VERSION_COMMENT static int select2VCheck(String stmt, int offset) { int length = offset + _VERSION_COMMENT.length; if (stmt.length() >= length) { if (ParseUtil.compare(stmt, offset, _VERSION_COMMENT)) { if (stmt.length() > length && stmt.charAt(length) != ' ') { return OTHER; } return VERSION_COMMENT; } } return OTHER; } // SESSION.AUTO_INCREMENT_INCREMENT static int select2SCheck(String stmt, int offset) { int length = offset + _SESSION_AUTO_INCREMENT.length; if (stmt.length() >= length) { if (ParseUtil.compare(stmt, offset, _SESSION_AUTO_INCREMENT)) { if (stmt.length() > length && stmt.charAt(length) != ' ') { return OTHER; } return SESSION_AUTO_INCREMENT; } } return OTHER; } }