1 /**
2 * - Digitalis Internal Framework v2.0 - (C) 2007, Digitalis Informatica. Distribuicao e Gestao de Informatica, Lda.
3 * Estrada de Paco de Arcos num.9 - Piso -1 2780-666 Paco de Arcos Telefone: (351) 21 4408990 Fax: (351) 21 4408999
4 * http://www.digitalis.pt
5 */
6 package pt.digitalis.dif.ioc;
7
8 import pt.digitalis.dif.startup.DIFStartupConfiguration;
9 import pt.digitalis.utils.ioc.IIoCRegistry;
10 import pt.digitalis.utils.ioc.IoCImplementations;
11 import pt.digitalis.utils.ioc.exception.IoCException;
12 import pt.digitalis.utils.ioc.guice.IoCRegistryGuiceImpl;
13
14 /**
15 * This class represents a wrapper class for the real registry implementation. Since we cant use IoC to abstract us from
16 * the IoC implementation we wish to use, we will use this Facade class to get to the real implementation. The registry
17 * is created with the proper implementation according to the default core dif configuration.
18 *
19 * @author Pedro Viegas <a href="mailto:pviegas@digitalis.pt">pviegas@digitalis.pt</a>
20 * @created Oct 2, 2007
21 */
22 final public class DIFIoCRegistry {
23
24 /** IIoCRegistry instance */
25 private static IIoCRegistry instance;
26
27 /**
28 * Getter for the Singleton instance of {@link IIoCRegistry}
29 *
30 * @return the registry instance
31 */
32 static public IIoCRegistry getRegistry()
33 {
34 if (instance == null)
35 if (IoCImplementations.GUICE.equals(DIFStartupConfiguration.getIoCImplementation()))
36 {
37 try
38 {
39 instance = IoCRegistryGuiceImpl.getRegistry(DIFStartupConfiguration.getModuleParser());
40 }
41 catch (IoCException iocException)
42 {
43 throw new RuntimeException("Could not find a valid IoC registry! Unable to proceed...",
44 iocException);
45 }
46 }
47 else
48 throw new RuntimeException("Unsupported IoC: \"" + DIFStartupConfiguration.getIoCImplementation()
49 + "\"\n" + "Check DIF configuration.");
50
51 return instance;
52 }
53
54 /**
55 * Enforce noninstantiability
56 */
57 private DIFIoCRegistry()
58 {}
59 }