JPA Entity Manager API notes

Bare basic stuff…

• Categorizes JPA Entity Manager operations
• Good for quick glance

Persistence Context Operations

CRUD operations

• <T> T find(java.lang.Class<T> entityClass, java.lang.Object primaryKey)
• <T> T find(java.lang.Class<T> entityClass, java.lang.Object primaryKey, LockModeType lockMode)
• <T> T find(java.lang.Class<T> entityClass, java.lang.Object primaryKey, LockModeType lockMode, java.util.Map<java.lang.String,java.lang.Object> properties)
• <T> T find(java.lang.Class<T> entityClass, java.lang.Object primaryKey, java.util.Map<java.lang.String,java.lang.Object> properties)
• <T> T merge(T entity)
• void persist(java.lang.Object entity)
• void remove(java.lang.Object entity)

other operations

• void refresh(java.lang.Object entity)
• void refresh(java.lang.Object entity, LockModeType lockMode)
• void refresh(java.lang.Object entity, LockModeType lockMode, java.util.Map<java.lang.String,java.lang.Object> properties)
• void refresh(java.lang.Object entity, java.util.Map<java.lang.String,java.lang.Object> properties)

• void flush()

• void clear()

• void detach(java.lang.Object entity)
• boolean contains(java.lang.Object entity)

Operations on self

• void close()
• boolean isOpen()

Query Operations

• Query createNamedQuery(java.lang.String name)
• <T> TypedQuery<T> createNamedQuery(java.lang.String name, java.lang.Class<T> resultClass)
• StoredProcedureQuery createNamedStoredProcedureQuery(java.lang.String name)
• Query createNativeQuery(java.lang.String sqlString)
• Query createNativeQuery(java.lang.String sqlString, java.lang.Class resultClass)
• Query createNativeQuery(java.lang.String sqlString, java.lang.String resultSetMapping)
• Query createQuery(CriteriaDelete deleteQuery)
• <T> TypedQuery<T> createQuery(CriteriaQuery<T> criteriaQuery)
• Query createQuery(CriteriaUpdate updateQuery)
• Query createQuery(java.lang.String qlString)
• <T> TypedQuery<T> createQuery(java.lang.String qlString, java.lang.Class<T> resultClass)
• StoredProcedureQuery createStoredProcedureQuery(java.lang.String procedureName)
• StoredProcedureQuery createStoredProcedureQuery(java.lang.String procedureName, java.lang.Class… resultClasses)
• StoredProcedureQuery createStoredProcedureQuery(java.lang.String procedureName, java.lang.String… resultSetMappings)
• CriteriaBuilder getCriteriaBuilder()

Entity Graph operations

• <T> EntityGraph<T> createEntityGraph(java.lang.Class<T> rootType)
• EntityGraph<?> createEntityGraph(java.lang.String graphName)
• EntityGraph<?> getEntityGraph(java.lang.String graphName)
• <T> java.util.List<EntityGraph<? super T>> getEntityGraphs(java.lang.Class<T> entityClass)

Transaction operations

• <T> T getReference(java.lang.Class<T> entityClass, java.lang.Object primaryKey)
• EntityTransaction getTransaction()
• boolean isJoinedToTransaction()
• void joinTransaction()

Lock operations

• void lock(java.lang.Object entity, LockModeType lockMode)
• void lock(java.lang.Object entity, LockModeType lockMode, java.util.Map<java.lang.String,java.lang.Object> properties)

Miscellaneous

• java.lang.Object getDelegate()
• EntityManagerFactory getEntityManagerFactory()
• FlushModeType getFlushMode()
• LockModeType getLockMode(java.lang.Object entity)
• Metamodel getMetamodel()
• java.util.Map<java.lang.String,java.lang.Object getProperties()
• void setFlushMode(FlushModeType flushMode)
• void setProperty(java.lang.String propertyName, java.lang.Object value)
• <T> T unwrap(java.lang.Class<T> cls)

Advertisement