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Java Source Code / Java Documentation » EJB Server resin 3.1.5 » jpa » javax.persistence

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Class Diagram

Java Document (Java Doc)

javax.persistence .EntityManager

EntityManager
public interface EntityManager (Code)
	The main application interface to the persistence context.

Method Summary
public void	clear() Clears the context, causing all entities to become detached.
public void	close() Closes the entity manager.
public boolean	contains(Object entity) Check if the instance belongs to the current context.
public Query	createNamedQuery(String name) Creates a named query.
public Query	createNativeQuery(String sql) Creates a native SQL query.
public Query	createNativeQuery(String sql, Class resultClass) Creates a native SQL query.
public Query	createNativeQuery(String sql, String resultSEtMapping) Creates a query for SQL.
public Query	createQuery(String ql) Creates a new query.
public T	find(Class<T> entityCLass, Object primaryKey) Find based on the primary key.
public void	flush() Synchronize the context with the database.
public Object	getDelegate() Gets the delegate.
public FlushModeType	getFlushMode() Returns the flush mode for the objects in the context.
public T	getReference(Class<T> entityClass, Object primaryKey) Gets an instance whose state may be lazily fetched.
public EntityTransaction	getTransaction() Returns the transaction manager object.
public boolean	isOpen() Returns true if the entity manager is open.
public void	joinTransaction() Joins the transaction.
public void	lock(Object entity, LockModeType lockMode) Sets the lock mode for an entity.
public T	merge(T entity) Merge the state of the entity to the current context.
public void	persist(Object entity) Makes an object managed and persistent.
public void	refresh(Object entity) Update the state of the instance from the database.
public void	remove(Object entity) Removes the instance.
public void	setFlushMode(FlushModeType flushMode) Sets the flush mode for all objects in the context.

Method Detail

clear
public void clear()(Code)
	Clears the context, causing all entities to become detached.

close
public void close()(Code)
	Closes the entity manager.

contains
public boolean contains(Object entity)(Code)
	Check if the instance belongs to the current context.

createNamedQuery
public Query createNamedQuery(String name)(Code)
	Creates a named query.

createNativeQuery
public Query createNativeQuery(String sql)(Code)
	Creates a native SQL query.

createNativeQuery
public Query createNativeQuery(String sql, Class resultClass)(Code)
	Creates a native SQL query.

createNativeQuery
public Query createNativeQuery(String sql, String resultSEtMapping)(Code)
	Creates a query for SQL.

createQuery
public Query createQuery(String ql)(Code)
	Creates a new query.

find
public T find(Class<T> entityCLass, Object primaryKey)(Code)
	Find based on the primary key.

flush
public void flush()(Code)
	Synchronize the context with the database.

getDelegate
public Object getDelegate()(Code)
	Gets the delegate.

getFlushMode
public FlushModeType getFlushMode()(Code)
	Returns the flush mode for the objects in the context.

getReference
public T getReference(Class<T> entityClass, Object primaryKey)(Code)
	Gets an instance whose state may be lazily fetched.

getTransaction
public EntityTransaction getTransaction()(Code)
	Returns the transaction manager object.

isOpen
public boolean isOpen()(Code)
	Returns true if the entity manager is open.

joinTransaction
public void joinTransaction()(Code)
	Joins the transaction.

lock
public void lock(Object entity, LockModeType lockMode)(Code)
	Sets the lock mode for an entity.

merge
public T merge(T entity)(Code)
	Merge the state of the entity to the current context.

persist
public void persist(Object entity)(Code)
	Makes an object managed and persistent.

refresh
public void refresh(Object entity)(Code)
	Update the state of the instance from the database.

remove
public void remove(Object entity)(Code)
	Removes the instance.

setFlushMode
public void setFlushMode(FlushModeType flushMode)(Code)
	Sets the flush mode for all objects in the context.

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