getExtent(persistenceCapableClass, subclasses) - JDO PersistenceManager's method
Method
javax.jdo.PersistenceManager
Extent<T> getExtent(
Class<T> persistenceCapableClass,
boolean subclasses
)
PersistenceManager
manages a collection of instances in the data store based on the class of the instances. This method returns an
Extent
of instances in the data store that might be iterated or given to a
Query
. The
Extent
itself might not reference any instances, but only hold the class name and an indicator as to whether subclasses are included in the
Extent
.
Note that the Extent
might be very large.
- Parameters:
-
persistenceCapableClass
-Class
of instances -
subclasses
- whether to include instances of subclasses
- Returns:
-
an
Extent
of the specifiedClass
- Since:
- JDO 1.0
- See Also:
-
Query