uk.ac.soton.itinnovation.grid.service.sla.dao
Interface GenericDAO<T,ID extends Serializable>

All Known Subinterfaces:

ActivityDAO, ResourcePoolDAO, ResourceWithUsageByMetricDAO, SlaDAO, SLATemplateDAO, UsageSummaryDAO, UsageSummaryElementDAO

All Known Implementing Classes:

ActivityDAOImpl, GenericHibernateDAO, ResourcePoolDAOImpl, ResourceWithUsageByMetricDAOImpl, SlaDAOImpl, SLATemplateDAOImpl, UsageSummaryDAOImpl, UsageSummaryElementDAOImpl

public interface GenericDAO<T,ID extends Serializable>

Method Summary

void	delete(T entity) Delete an entity.
List<T>	findAll() Find all entities
T	findById(ID id) Find the entity identified by id
T	findById(ID id, boolean lock) Find the entity identified by id and optionally acquire a pessimistic lock on the entity.
void	saveOrUpdate(T entity) Save or update entity

Method Detail

findById

T findById(ID id)

Find the entity identified by id

Parameters:

id - the identity property of the entity

Returns:

the entity or null

findById

T findById(ID id,
           boolean lock)

Find the entity identified by id and optionally acquire a pessimistic lock on the entity.

Parameters:

id - the unique id for the entity

lock - whether or not to obtain a pessimistic lock

Returns:

the entity or null if it does not exist

findAll

List<T> findAll()

Find all entities

Returns:

List of all entities

saveOrUpdate

void saveOrUpdate(T entity)

Save or update entity

Parameters:

entity - the entity to save or update

delete

void delete(T entity)

Delete an entity. The entity is passes as a parameter (rather than the id of the entity) because the hibernate delete API is like this.

Parameters:

entity - the entity to delete