org.dspace.core

Interface GenericDAO<T>

Type Parameters:

T - class type

All Known Subinterfaces:

BasicWorkflowItemDAO, BitstreamDAO, BitstreamFormatDAO, BundleDAO, ChecksumHistoryDAO, ChecksumResultDAO, ClaimedTaskDAO, CollectionDAO, CollectionRoleDAO, CommunityDAO, DOIDAO, DSpaceObjectDAO<T>, DSpaceObjectLegacySupportDAO<T>, EPersonDAO, Group2GroupCacheDAO, GroupDAO, HandleDAO, HarvestedCollectionDAO, HarvestedItemDAO, InProgressUserDAO, ItemDAO, MetadataFieldDAO, MetadataSchemaDAO, MetadataValueDAO, MostRecentChecksumDAO, PoolTaskDAO, RegistrationDataDAO, RequestItemDAO, ResourcePolicyDAO, SiteDAO, SubscriptionDAO, TaskListItemDAO, VersionDAO, VersionHistoryDAO, WebAppDAO, WorkflowItemRoleDAO, WorkspaceItemDAO, XmlWorkflowItemDAO

All Known Implementing Classes:

AbstractHibernateDAO, AbstractHibernateDSODAO, BasicWorkflowItemDAOImpl, BitstreamDAOImpl, BitstreamFormatDAOImpl, BundleDAOImpl, ChecksumHistoryDAOImpl, ChecksumResultDAOImpl, ClaimedTaskDAOImpl, CollectionDAOImpl, CollectionRoleDAOImpl, CommunityDAOImpl, DOIDAOImpl, EPersonDAOImpl, Group2GroupCacheDAOImpl, GroupDAOImpl, HandleDAOImpl, HarvestedCollectionDAOImpl, HarvestedItemDAOImpl, InProgressUserDAOImpl, ItemDAOImpl, MetadataFieldDAOImpl, MetadataSchemaDAOImpl, MetadataValueDAOImpl, MostRecentChecksumDAOImpl, PoolTaskDAOImpl, RegistrationDataDAOImpl, RequestItemDAOImpl, ResourcePolicyDAOImpl, SiteDAOImpl, SubscriptionDAOImpl, TaskListItemDAOImpl, VersionDAOImpl, VersionHistoryDAOImpl, WebAppDAOImpl, WorkflowItemRoleDAOImpl, WorkspaceItemDAOImpl, XmlWorkflowItemDAOImpl

public interface GenericDAO<T>

Generic Database Access Object interface class that should be implemented by all DAOs. It offers up a lot of general methods so these don't need to be declared again in each DAO. The default hibernate implementation offers up a class that implements all these methods.

Author:

kevinvandevelde at atmire.com

Method Summary

Modifier and Type	Method and Description
T	create(Context context, T t)
void	delete(Context context, T t)
List<T>	findAll(Context context, Class<T> clazz) Fetch all persisted instances of a given object type.
T	findByID(Context context, Class clazz, int id)
T	findByID(Context context, Class clazz, UUID id)
List<T>	findMany(Context context, String query) Execute a JPQL query and return a collection of results.
T	findUnique(Context context, String query) Execute a JPQL query returning a unique result.
void	save(Context context, T t)

Method Detail

create

T create(Context context,
         T t)
  throws SQLException

Throws:

SQLException

save

void save(Context context,
          T t)
   throws SQLException

Throws:

SQLException

delete

void delete(Context context,
            T t)
     throws SQLException

Throws:

SQLException

findAll

List<T> findAll(Context context,
                Class<T> clazz)
         throws SQLException

Fetch all persisted instances of a given object type.

Parameters:

context -

clazz - the desired type.

Returns:

list of DAOs of the same type as clazz

Throws:

SQLException - if database error

findUnique

T findUnique(Context context,
             String query)
      throws SQLException

Execute a JPQL query returning a unique result.

Parameters:

context -

query - JPQL query string

Returns:

a DAO specified by the query string

Throws:

SQLException - if database error

findByID

T findByID(Context context,
           Class clazz,
           int id)
    throws SQLException

Throws:

SQLException

findByID

T findByID(Context context,
           Class clazz,
           UUID id)
    throws SQLException

Throws:

SQLException

findMany

List<T> findMany(Context context,
                 String query)
          throws SQLException

Execute a JPQL query and return a collection of results.

Parameters:

context -

query - JPQL query string

Returns:

list of DAOs specified by the query string

Throws:

SQLException - if database error