Mercurial > dive4elements > gnv-client
comparison geo-backend/src/main/java/de/intevation/gnv/geobackend/base/query/QueryExecutorFactory.java @ 132:5a583cff97ea
Implementation of the Datainfrastructure for fetching Data from different DataStores.
geo-backend/trunk@12 c6561f87-3c4e-4783-a992-168aeb5c3f6f
| author | Tim Englich <tim.englich@intevation.de> |
|---|---|
| date | Fri, 04 Sep 2009 08:11:30 +0000 |
| parents | |
| children | 3cbf11c67fdc |
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| 131:d8ff739b9f3b | 132:5a583cff97ea |
|---|---|
| 1 /** | |
| 2 * | |
| 3 */ | |
| 4 package de.intevation.gnv.geobackend.base.query; | |
| 5 | |
| 6 import org.apache.log4j.Logger; | |
| 7 | |
| 8 /** | |
| 9 * @author Tim Englich <tim.englich@intevation.de> | |
| 10 * | |
| 11 */ | |
| 12 public class QueryExecutorFactory { | |
| 13 | |
| 14 /** | |
| 15 * the logger, used to log exceptions and additonaly information | |
| 16 */ | |
| 17 private static Logger log = Logger.getLogger(QueryExecutorFactory.class); | |
| 18 | |
| 19 | |
| 20 /** | |
| 21 * The singleton Instance of this Factory. | |
| 22 */ | |
| 23 private static QueryExecutorFactory instance = null; | |
| 24 | |
| 25 /** | |
| 26 * Basic-Constructor of this Class | |
| 27 */ | |
| 28 private QueryExecutorFactory() { | |
| 29 super(); | |
| 30 } | |
| 31 | |
| 32 /** | |
| 33 * This Method provides an singleton Instance of this Class. | |
| 34 * @return an singleton Instance of this Class | |
| 35 */ | |
| 36 public static QueryExecutorFactory getInstance(){ | |
| 37 if (instance == null){ | |
| 38 instance = new QueryExecutorFactory(); | |
| 39 } | |
| 40 return instance; | |
| 41 } | |
| 42 | |
| 43 | |
| 44 /** | |
| 45 * Getting the QueryExecutor | |
| 46 * @return the QueryExecutor | |
| 47 */ | |
| 48 public QueryExecutor getQueryExecutor(){ | |
| 49 return new DefaultQueryExceutor(); | |
| 50 } | |
| 51 } |