Created
August 18, 2015 23:11
-
-
Save mrserverless/930d4d40a787a1f6a7d1 to your computer and use it in GitHub Desktop.
Hibernate GenericDAO using Class-Mate
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
class Device {} | |
class Router extends Device {} | |
class GenericDAO<T, ID extends Serializable> { | |
protected Class<T> persistentClass; | |
protected Class<ID> idClass; | |
private GenericDAO() { | |
List <ResolvedType> typeParameters = new TypeResolver().resolve(this.getClass()).typeParametersFor(GenericDAO.class); | |
this.persistentClass = (Class<T>) typeParameters.get(0).getErasedType(); | |
this.idClass = (Class<ID>) typeParameters.get(1).getErasedType(); | |
} | |
} | |
class DeviceDAO<T extends Device> extends GenericDAO<T, Long> {} | |
class RouterDAO extends DeviceDAO<Router> {} | |
@Test | |
public void resolvesEntityType () { | |
RouterDAO routerDAO = new RouterDAO(); | |
assert routerDAO.persistentClass == Router.class; | |
assert routerDAO.idClass == Long.class; | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment