Skip navigation links

oracle.toplink.sessions.entitymanager
Class Persistence

java.lang.Object
oracle.toplink.sessions.entitymanager.Persistence

public class Persistence

extends java.lang.Object

Bootstrap class that provides access to an EntityManagerFactory, from which EntityManager references can be obtained.

Field Summary

static java.lang.String

PROVIDER_NAME Symbolic constant used by calls to createEntityManagerFactory(java.util.Map) methods to look up the implementation to load.

Constructor Summary

Persistence()

Method Summary

static EntityManagerFactory	createEntityManagerFactory() Create an EntityManagerFactory.
static EntityManagerFactory	createEntityManagerFactory(java.util.Map m) Create an EntityManagerFactory.

Methods inherited from class java.lang.Object

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

Field Detail

PROVIDER_NAME

public static final java.lang.String PROVIDER_NAME

Symbolic constant used by calls to createEntityManagerFactory(java.util.Map) methods to look up the implementation to load. This is set to "javax.persistence.provider".

See Also:

Constant Field Values

Constructor Detail

Persistence

public Persistence()

Method Detail

createEntityManagerFactory

public static EntityManagerFactory createEntityManagerFactory(java.util.Map m)

Create an EntityManagerFactory. This looks through the following locations for a key called "javax.persistence.provider" that identifies which implementation should be created.

1. contents of the Map parameter to this method call.
2. applet environment
3. system environment
4. the contents of persistence.properties, as loaded by a call to ClassLoader.getResourceAsStream(java.lang.String).

Note: we can steal some good copy from the javax.naming.Context and InitialContext JavaDocs, which outline similar rules for locating environment settings.

createEntityManagerFactory

public static EntityManagerFactory createEntityManagerFactory()

Create an EntityManagerFactory. This uses the same heuristics as createEntityManagerFactory(java.util.Map), except that no invocation-specific information is used here.

Skip navigation links