NPersistence Reference Guide
.NET Persistence API (NPA) - JPA for the .NET platform (for C#, Visual Basic and other .NET languages). .NET Persistence API (NPA)
The EntityManagerFactory type exposes the following methods.
Methods
 Public Protected | Instance Static | Declared Inherited | XNA Framework Only .NET Compact Framework Only |
| Member | Description | |
|---|---|---|
 | Close()()()() | Close the factory, releasing any resources that it holds.
After a factory instance has been closed, all methods invoked
on it will throw the InvalidOperationException, except
for isOpen, which will return false. Once an
EntityManagerFactory has been closed, all its
entity managers are considered to be in the closed state.
if the entity manager factory
has been closed |
| CreateEntityManager()()()() | Create a new application-managed EntityManager.
This method returns a new EntityManager instance each time
it is invoked.
The isOpen method will return true on the returned instance.
Return Valueentity manager instance if the entity manager factory has been closed |
| CreateEntityManager(Dictionary<(Of <<'(Object, Object>)>>)) | Create a new application-managed EntityManager with the
specified Map of properties.
This method returns a new EntityManager instance each time
it is invoked.
The isOpen method will return true on the returned instance.
properties for entity manager Return Valueentity manager instance if the entity manager factory has been closed |
| GetCache()()()() | Access the cache that is associated with the entity manager
factory (the "second level cache").
Return Valueinstance of the Cache interface if the entity manager factory has been closed |
| GetPersistenceUnitUtil()()()() | Return interface providing access to utility methods
for the persistence unit.
Return ValuePersistenceUnitUtil interface if the entity manager factory has been closed |
| GetProperties()()()() | Get the properties and associated values that are in effect
for the entity manager factory. Changing the contents of the
map does not change the configuration in effect.
Return Valueproperties if the entity manager factory has been closed |
| IsOpen()()()() | Indicates whether the factory is open. Returns true
until the factory has been closed.
Return Valueboolean indicating whether the factory is open |
See Also