org.dspace.core

Class AbstractHibernateDAO<T>

java.lang.Object

org.dspace.core.AbstractHibernateDAO<T>

Type Parameters:

T - class type

All Implemented Interfaces:

GenericDAO<T>

Direct Known Subclasses:

AbstractHibernateDSODAO, BasicWorkflowItemDAOImpl, BitstreamFormatDAOImpl, ChecksumHistoryDAOImpl, ChecksumResultDAOImpl, ClaimedTaskDAOImpl, CollectionRoleDAOImpl, DOIDAOImpl, Group2GroupCacheDAOImpl, HandleDAOImpl, HarvestedCollectionDAOImpl, HarvestedItemDAOImpl, InProgressUserDAOImpl, MetadataFieldDAOImpl, MetadataSchemaDAOImpl, MetadataValueDAOImpl, MostRecentChecksumDAOImpl, PoolTaskDAOImpl, RegistrationDataDAOImpl, RequestItemDAOImpl, ResourcePolicyDAOImpl, SiteDAOImpl, SubscriptionDAOImpl, TaskListItemDAOImpl, VersionDAOImpl, VersionHistoryDAOImpl, WebAppDAOImpl, WorkflowItemRoleDAOImpl, WorkspaceItemDAOImpl, XmlWorkflowItemDAOImpl

public abstract class AbstractHibernateDAO<T>
extends Object
implements GenericDAO<T>

Hibernate implementation for generic DAO interface. Also includes additional Hibernate calls that are commonly used. Each DAO should extend this class to prevent code duplication.

Author:

kevinvandevelde at atmire.com

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractHibernateDAO()

Method Summary

Modifier and Type	Method and Description
int	count(org.hibernate.Criteria criteria)
int	count(org.hibernate.Query query)
long	countLong(org.hibernate.Criteria criteria)
T	create(Context context, T t)
org.hibernate.Criteria	createCriteria(Context context, Class<T> persistentClass)
org.hibernate.Criteria	createCriteria(Context context, Class<T> persistentClass, String alias)
org.hibernate.Query	createQuery(Context context, String query)
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, org.hibernate.Query query) Execute a JPA Criteria query and return a collection of results.
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.
protected org.hibernate.Session	getHibernateSession(Context context)
Iterator<T>	iterate(org.hibernate.Query query)
List<T>	list(org.hibernate.Criteria criteria)
List<T>	list(org.hibernate.Query query)
void	save(Context context, T t)
T	singleResult(org.hibernate.Criteria criteria) Retrieve a single result from the query.
T	singleResult(org.hibernate.Query query)
T	uniqueResult(org.hibernate.Criteria criteria) Retrieve a unique result from the query.
T	uniqueResult(org.hibernate.Query query)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AbstractHibernateDAO

protected AbstractHibernateDAO()

Method Detail

create

public T create(Context context,
                T t)
         throws SQLException

Specified by:

create in interface GenericDAO<T>

Throws:

SQLException

save

public void save(Context context,
                 T t)
          throws SQLException

Specified by:

save in interface GenericDAO<T>

Throws:

SQLException

getHibernateSession

protected org.hibernate.Session getHibernateSession(Context context)
                                             throws SQLException

Throws:

SQLException

delete

public void delete(Context context,
                   T t)
            throws SQLException

Specified by:

delete in interface GenericDAO<T>

Throws:

SQLException

findAll

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

Description copied from interface: GenericDAO

Fetch all persisted instances of a given object type.

Specified by:

findAll in interface GenericDAO<T>

clazz - the desired type.

Returns:

list of DAOs of the same type as clazz

Throws:

SQLException - if database error

findUnique

public T findUnique(Context context,
                    String query)
             throws SQLException

Description copied from interface: GenericDAO

Execute a JPQL query returning a unique result.

Specified by:

findUnique in interface GenericDAO<T>

query - JPQL query string

Returns:

a DAO specified by the query string

Throws:

SQLException - if database error

findByID

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

Specified by:

findByID in interface GenericDAO<T>

Throws:

SQLException

findByID

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

Specified by:

findByID in interface GenericDAO<T>

Throws:

SQLException

findMany

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

Description copied from interface: GenericDAO

Execute a JPQL query and return a collection of results.

Specified by:

findMany in interface GenericDAO<T>

query - JPQL query string

Returns:

list of DAOs specified by the query string

Throws:

SQLException - if database error

findMany

public List<T> findMany(Context context,
                        org.hibernate.Query query)
                 throws SQLException

Execute a JPA Criteria 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

createCriteria

public org.hibernate.Criteria createCriteria(Context context,
                                             Class<T> persistentClass)
                                      throws SQLException

Throws:

SQLException

createCriteria

public org.hibernate.Criteria createCriteria(Context context,
                                             Class<T> persistentClass,
                                             String alias)
                                      throws SQLException

Throws:

SQLException

createQuery

public org.hibernate.Query createQuery(Context context,
                                       String query)
                                throws SQLException

Throws:

SQLException

list

public List<T> list(org.hibernate.Criteria criteria)

list

public List<T> list(org.hibernate.Query query)

uniqueResult

public T uniqueResult(org.hibernate.Criteria criteria)

Retrieve a unique result from the query. If multiple results CAN be retrieved an exception will be thrown, so only use when the criteria state uniqueness in the database.

Parameters:

criteria -

Returns:

a DAO specified by the criteria

singleResult

public T singleResult(org.hibernate.Criteria criteria)

Retrieve a single result from the query. Best used if you expect a single result, but this isn't enforced on the database.

Parameters:

criteria -

Returns:

a DAO specified by the criteria

singleResult

public T singleResult(org.hibernate.Query query)

uniqueResult

public T uniqueResult(org.hibernate.Query query)

iterate

public Iterator<T> iterate(org.hibernate.Query query)

count

public int count(org.hibernate.Criteria criteria)

count

public int count(org.hibernate.Query query)

countLong

public long countLong(org.hibernate.Criteria criteria)