org.iternine.jeppetto.dao
Interface GenericDAO<T,ID>

Type Parameters:

T - Persistent Class

ID - ID type for the persistent class.

All Known Subinterfaces:

QueryModelDAO<T,ID>

public interface GenericDAO<T,ID>

A GenericDAO is the root interface for DAOs that fit within the Jeppetto framework. This defines base functionality such as finding a specific item by its identifier and saving an to the underlying data store.

Method Summary

void	delete(T object) Delete the specified object from the persistent store.
void	deleteById(ID id) Delete an object from the persistent store based on the id.
Iterable<T>	findAll() Find all objects of type T.
T	findById(ID id) Find an object T with the specified id.
void	flush() If the implementation supports lazy writes, manually flush changes to the external database
void	save(T object) Call save to insert a new object into the persistent store or update a preexisting object that has been modified.

Method Detail

findById

T findById(ID id)
           throws NoSuchItemException,
                  JeppettoException

Find an object T with the specified id.

Parameters:

id - of the desired object.

Returns:

Object with the specified id

Throws:

NoSuchItemException - if the object identified by the id is not found

JeppettoException - if any other failure occurs

findAll

Iterable<T> findAll()
                    throws JeppettoException

Find all objects of type T.

Returns:

Iterable of T

Throws:

JeppettoException - if any underlying failure occurs

save

void save(T object)
          throws OptimisticLockException,
                 JeppettoException

Call save to insert a new object into the persistent store or update a preexisting object that has been modified.

Parameters:

object - to save.

Throws:

OptimisticLockException - if optimistic locking is enabled and a save is attempted on an already modified object.

JeppettoException - if any other failure occurs

delete

void delete(T object)
            throws JeppettoException

Delete the specified object from the persistent store.

Parameters:

object - to delete.

Throws:

JeppettoException - if any underlying failure occurs

deleteById

void deleteById(ID id)
                throws JeppettoException

Delete an object from the persistent store based on the id.

Parameters:

id - of the object to delete.

Throws:

JeppettoException - if any underlying failure occurs

flush

void flush()
           throws JeppettoException

If the implementation supports lazy writes, manually flush changes to the external database

Throws:

JeppettoException - if any underlying failure occurs