javax.ejb

Interface EntityContext

All Superinterfaces:

EJBContext

public interface EntityContext
extends EJBContext

The EntityContext interface provides an instance with access to the container-provided runtime context of an entity bean instance. The container passes the EntityContext interface to an entity bean instance after the instance has been created.

The EntityContext interface remains associated with the instance for the lifetime of the instance. Note that the information that the instance obtains using the EntityContext interface (such as the result of the getPrimaryKey() method) may change, as the container assigns the instance to different enterprise bean objects during the instance's life cycle.

Note: Support for entity beans is optional as of EJB 3.2.

Since:

EJB 2.0

Method Summary

Modifier and Type	Method and Description
EJBLocalObject	getEJBLocalObject() Obtain a reference to the enterprise bean local object that is currently associated with the instance.
EJBObject	getEJBObject() Obtain a reference to the enterprise bean object that is currently associated with the instance.
Object	getPrimaryKey() Obtain the primary key of the enterprise bean object that is currently associated with this instance.

Methods inherited from interface javax.ejb.EJBContext

getCallerIdentity, getCallerPrincipal, getContextData, getEJBHome, getEJBLocalHome, getEnvironment, getRollbackOnly, getTimerService, getUserTransaction, isCallerInRole, isCallerInRole, lookup, setRollbackOnly

Method Detail

getEJBLocalObject

EJBLocalObject getEJBLocalObject()
                          throws IllegalStateException

Obtain a reference to the enterprise bean local object that is currently associated with the instance.

An instance of an entity bean can call this method only when the instance is associated with an enterprise bean local object identity, i.e. in the ejbActivate, ejbPassivate, ejbPostCreate, ejbRemove, ejbLoad, ejbStore, and business methods.

An instance can use this method, for example, when it wants to pass a reference to itself in a method argument or result.

Returns:

The enterprise bean local object currently associated with the instance.

Throws:

IllegalStateException - if the instance invokes this method while the instance is in a state that does not allow the instance to invoke this method, or if the instance does not have a local interface.

Since:

EJB 2.0

getEJBObject

EJBObject getEJBObject()
                throws IllegalStateException

Obtain a reference to the enterprise bean object that is currently associated with the instance.

An instance of an entity bean can call this method only when the instance is associated with an enterprise bean object identity, i.e. in the ejbActivate, ejbPassivate, ejbPostCreate, ejbRemove, ejbLoad, ejbStore, and business methods.

An instance can use this method, for example, when it wants to pass a reference to itself in a method argument or result.

Returns:

The enterprise bean object currently associated with the instance.

Throws:

IllegalStateException - Thrown if the instance invokes this method while the instance is in a state that does not allow the instance to invoke this method, or if the instance does not have a remote interface.

getPrimaryKey

Object getPrimaryKey()
              throws IllegalStateException

Obtain the primary key of the enterprise bean object that is currently associated with this instance.

An instance of an entity bean can call this method only when the instance is associated with an enterprise bean object identity, i.e. in the ejbActivate, ejbPassivate, ejbPostCreate, ejbRemove, ejbLoad, ejbStore, and business methods.

Note: The result of this method is that same as the result of getEJBObject().getPrimaryKey().

Returns:

The primary key currently associated with the instance.

Throws:

IllegalStateException - Thrown if the instance invokes this method while the instance is in a state that does not allow the instance to invoke this method.