001/**
002 *
003 * Copyright (c) 2014, the Railo Company Ltd. All rights reserved.
004 *
005 * This library is free software; you can redistribute it and/or
006 * modify it under the terms of the GNU Lesser General Public
007 * License as published by the Free Software Foundation; either 
008 * version 2.1 of the License, or (at your option) any later version.
009 * 
010 * This library is distributed in the hope that it will be useful,
011 * but WITHOUT ANY WARRANTY; without even the implied warranty of
012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
013 * Lesser General Public License for more details.
014 * 
015 * You should have received a copy of the GNU Lesser General Public 
016 * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
017 * 
018 **/
019package lucee.runtime.db;
020
021import java.util.HashSet;
022import java.util.Set;
023
024import lucee.runtime.sql.SQLParserException;
025import lucee.runtime.sql.SelectParser;
026import lucee.runtime.sql.Selects;
027import lucee.runtime.sql.exp.Column;
028
029public class HSQLUtil2 {
030
031        private Selects selects;
032
033        public HSQLUtil2(SQL sql) throws SQLParserException {
034                selects = new SelectParser().parse(sql.getSQLString());
035        }
036
037        public HSQLUtil2(Selects selects) {
038                this.selects = selects;
039        }
040
041        public boolean isUnion() {
042                return selects.getSelects().length>1;
043        }
044
045        public Set<String> getInvokedTables() {
046                HashSet<String> set=new HashSet<String>();
047                Column[] tables = selects.getTables();
048                for(int i=0;i<tables.length;i++) {
049                        set.add(tables[i].getFullName());
050                }               
051                return set;
052        }
053
054}