root / branches / v2_0_0_prep / libraries / libFMap_dal / src / org / gvsig / fmap / dal / DALLocator.java @ 24496
History | View | Annotate | Download (3.16 KB)
| 1 |
package org.gvsig.fmap.dal; |
|---|---|
| 2 |
|
| 3 |
import org.gvsig.fmap.dal.resource.ResourceManager; |
| 4 |
import org.gvsig.tools.locator.AbstractLocator; |
| 5 |
import org.gvsig.tools.locator.Locator; |
| 6 |
import org.gvsig.tools.locator.LocatorException; |
| 7 |
|
| 8 |
/**
|
| 9 |
* @see {@link Locator}
|
| 10 |
*
|
| 11 |
* This locator is the entry point of gvSIG's DAL, providing access to all DAL services.
|
| 12 |
* DAL services are grouped in two managers {@link DataManager} and {@link ResourceManager}.
|
| 13 |
*
|
| 14 |
* This locator offers methods for registering as well as for obtaining both managers' unique instances.
|
| 15 |
*
|
| 16 |
*/
|
| 17 |
public class DALLocator extends AbstractLocator { |
| 18 |
|
| 19 |
private static final String LOCATOR_NAME = "DALLocator"; |
| 20 |
|
| 21 |
/**
|
| 22 |
* DataManager name used by the locator to access the instance
|
| 23 |
*/
|
| 24 |
public static final String DATA_MANAGER_NAME = "DataManager"; |
| 25 |
|
| 26 |
private static final String DATA_MANAGER_DESCRIPTION = "DataManager of gvSIG Data Access Library"; |
| 27 |
|
| 28 |
/**
|
| 29 |
* ResourceManager name used by the locator to access the instance
|
| 30 |
*/
|
| 31 |
public static final String RESOURCE_MANAGER_NAME = "ResourceManager"; |
| 32 |
|
| 33 |
private static final String RESOURCE_MANAGER_DESCRIPTION = "ResourceManager of gvSIG Data Access Library"; |
| 34 |
|
| 35 |
/**
|
| 36 |
* Unique instance.
|
| 37 |
*/
|
| 38 |
private static final DALLocator instance = new DALLocator(); |
| 39 |
|
| 40 |
/**
|
| 41 |
* Return the singleton instance.
|
| 42 |
*
|
| 43 |
* @return the singleton instance
|
| 44 |
*/
|
| 45 |
public static DALLocator getInstance() { |
| 46 |
return instance;
|
| 47 |
} |
| 48 |
|
| 49 |
/**
|
| 50 |
* Returns the Locator name.
|
| 51 |
*
|
| 52 |
* @return String containing the locator name.
|
| 53 |
*/
|
| 54 |
public String getLocatorName() { |
| 55 |
return LOCATOR_NAME;
|
| 56 |
} |
| 57 |
|
| 58 |
/**
|
| 59 |
* Return a reference to DataManager.
|
| 60 |
*
|
| 61 |
* @return a reference to DataManager
|
| 62 |
* @throws LocatorException
|
| 63 |
* if there is no access to the class or the class cannot be
|
| 64 |
* instantiated
|
| 65 |
* @see Locator#get(String)
|
| 66 |
*/
|
| 67 |
public static DataManager getDataManager() throws LocatorException { |
| 68 |
return (DataManager) getInstance().get(DATA_MANAGER_NAME);
|
| 69 |
} |
| 70 |
|
| 71 |
/**
|
| 72 |
* Registers the Class implementing the DataManager interface.
|
| 73 |
*
|
| 74 |
* @param clazz
|
| 75 |
* implementing the DataManager interface
|
| 76 |
*/
|
| 77 |
public static void registerDataManager(Class clazz) { |
| 78 |
getInstance().register(DATA_MANAGER_NAME, DATA_MANAGER_DESCRIPTION, |
| 79 |
clazz); |
| 80 |
} |
| 81 |
|
| 82 |
/**
|
| 83 |
* Registers a class as the default DataManager.
|
| 84 |
*
|
| 85 |
* @param clazz
|
| 86 |
* implementing the DataManager interface
|
| 87 |
*/
|
| 88 |
public static void registerDefaultDataManager(Class clazz) { |
| 89 |
getInstance().registerDefault(DATA_MANAGER_NAME, DATA_MANAGER_DESCRIPTION, |
| 90 |
clazz); |
| 91 |
} |
| 92 |
|
| 93 |
/**
|
| 94 |
* Return a reference to ResourceManager.
|
| 95 |
*
|
| 96 |
* @return a reference to ResourceManager
|
| 97 |
* @throws LocatorException
|
| 98 |
* if there is no access to the class or the class cannot be
|
| 99 |
* instantiated
|
| 100 |
* @see Locator#get(String)
|
| 101 |
*/
|
| 102 |
public static ResourceManager getResourceManager() throws LocatorException { |
| 103 |
return (ResourceManager) getInstance().get(RESOURCE_MANAGER_NAME);
|
| 104 |
} |
| 105 |
|
| 106 |
/**
|
| 107 |
* Registers the Class implementing the MDManager interface.
|
| 108 |
*
|
| 109 |
* @param clazz
|
| 110 |
* implementing the MDManager interface
|
| 111 |
*/
|
| 112 |
public static void registerResourceManager(Class clazz) { |
| 113 |
getInstance().register(RESOURCE_MANAGER_NAME, |
| 114 |
RESOURCE_MANAGER_DESCRIPTION, clazz); |
| 115 |
} |
| 116 |
|
| 117 |
} |