001    /*
002     * $RCSfile: QueryStrategyFactory.java,v $
003     *
004     * Created on March 13, 2003, 10:08 AM
005     *
006     * This file is part of the STAR Scheduler.
007     * Copyright (c) 2002-2006 STAR Collaboration - Brookhaven National Laboratory
008     *
009     * STAR Scheduler is free software; you can redistribute it and/or modify
010     * it under the terms of the GNU General Public License as published by
011     * the Free Software Foundation; either version 2 of the License, or
012     * (at your option) any later version.
013     *
014     * STAR Scheduler is distributed in the hope that it will be useful,
015     * but WITHOUT ANY WARRANTY; without even the implied warranty of
016     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
017     * GNU General Public License for more details.
018     *
019     * You should have received a copy of the GNU General Public License
020     * along with STAR Scheduler; if not, write to the Free Software
021     * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
022     */
023    
024    package gov.bnl.star.offline.scheduler.catalog;
025    
026    import gov.bnl.star.offline.scheduler.CatalogQuery;
027    import org.apache.log4j.Logger;
028    
029    /** @deprecated please see gov.bnl.star.offline.scheduler.dataset.* for replacements.
030     *
031     * @author  Gabriele Carcassi
032     * @version $Revision: 1.7 $ $Date: 2006/11/21 00:41:31 $
033     */
034    public class QueryStrategyFactory {
035        static private Logger log = Logger.getLogger(QueryStrategyFactory.class.getName());
036        
037        public static QueryStrategy createStrategy(CatalogQuery query) {
038            switch (query.getCountingType()) {
039                case CatalogQuery.NO_COUNTING:
040                    log.debug("NO_COUNTING: using StopWhenSatisfiedStrategy with 100 files");
041                    query.setNFiles(new Integer(100));
042                    return new StopWhenSatisfiedStrategy();
043                case CatalogQuery.START_LIMIT_COUNTING:
044                    log.debug("START_LIMIT_COUNTING: using StartLimitSatisfiedStrategy");
045                    return new StartLimitStrategy();
046                case CatalogQuery.NFILES_COUNTING:
047                    if (query.getNFiles().intValue() == -1) {
048                        log.debug("NFILES_COUNTING with all: using AllFilesStrategy");
049                        return new AllFilesStrategy();
050                    } else {
051                        log.debug("NFILES_COUNTING: using StopWhenSatisfiedStrategy");
052                        return new StopWhenSatisfiedStrategy();
053                    }
054                default:
055                    log.warn("The query didn't have a valid counting type: " + query.getCountingType());
056                    log.info("Number of files found : 0");
057                    return null;
058            }
059        }
060        
061    }