com.googlecode.jinahya.persistence

Class EntityFacadeSupport

java.lang.Object

com.googlecode.jinahya.persistence.EntityFacadeSupport

public class EntityFacadeSupport
extends Object

Author:

Jin Kwon

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	EntityFacadeSupport() Creates a new instance.

Method Summary

Methods

Modifier and Type	Method and Description
static <E,I> E	find(javax.persistence.EntityManager entityManager, Class<E> entityClass, I primaryKey) Finds an entity instance.
static <E> E	merge(javax.persistence.EntityManager entityManager, Class<E> entityClass, E entityInstance) Merges an entity instance.
static <E> void	persist(javax.persistence.EntityManager entityManager, Class<E> entityClass, E entityInstance) Persists an entity instance.
static <E,I> E	remove(javax.persistence.EntityManager entityManager, Class<E> entityClass, I primaryKey) Removes an entity instance.

Methods inherited from class java.lang.Object

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

Constructor Detail

EntityFacadeSupport

protected EntityFacadeSupport()

Creates a new instance.

Method Detail

find

public static <E,I> E find(javax.persistence.EntityManager entityManager,
           Class<E> entityClass,
           I primaryKey)

Finds an entity instance.

Type Parameters:

E - entity instance type parameter

I - primary key type parameter

Parameters:

entityManager - entity manager

entityClass - entity class

primaryKey - primary key

Returns:

found entity instance or null if not found

persist

public static <E> void persist(javax.persistence.EntityManager entityManager,
               Class<E> entityClass,
               E entityInstance)

Persists an entity instance.

Type Parameters:

E - entity type parameter

Parameters:

entityManager - entity manager

entityClass - entity class

entityInstance - entity instance

merge

public static <E> E merge(javax.persistence.EntityManager entityManager,
          Class<E> entityClass,
          E entityInstance)

Merges an entity instance.

Type Parameters:

E - entity type parameter

Parameters:

entityManager - entity manager

entityClass - entity class

entityInstance - entity instance

Returns:

merged entity instance or null if removed

remove

public static <E,I> E remove(javax.persistence.EntityManager entityManager,
             Class<E> entityClass,
             I primaryKey)

Removes an entity instance.

Type Parameters:

E - entity type parameter

I - primary key type parameter

Parameters:

entityManager - entity manager

entityClass - entity class

primaryKey - primary key

Returns:

removed entity instance or null if not found