org.apache.openjpa.kernel
Interface Extent<T>

All Known Implementing Classes:

DelegatingExtent, ExtentImpl

public interface Extent<T>

Representation of all members of a persistent class.

Author:

Abe White, Patrick Linskey

Method Summary

void	closeAll() Close all open iterators.
Broker	getBroker() The broker that generated the extent.
Class<T>	getElementType() The class of extent elements.
FetchConfiguration	getFetchConfiguration() Return the (mutable) fetch configuration for this extent.
boolean	getIgnoreChanges() Whether this extent will ignore changes made in the current transaction.
boolean	hasSubclasses() Whether the extent includes subclasses.
Iterator<T>	iterator() Return an iterator over the extent members.
List<T>	list() Returns a list of all objects represented by this extent.
void	lock() Synchronizes on an internal lock.
void	setIgnoreChanges(boolean ignoreChanges) Whether this extent will ignore changes made in the current transaction.
void	unlock() Release the internal lock.

Method Detail

getFetchConfiguration

FetchConfiguration getFetchConfiguration()

Return the (mutable) fetch configuration for this extent.

getIgnoreChanges

boolean getIgnoreChanges()

Whether this extent will ignore changes made in the current transaction.

setIgnoreChanges

void setIgnoreChanges(boolean ignoreChanges)

Whether this extent will ignore changes made in the current transaction.

list

List<T> list()

Returns a list of all objects represented by this extent. This method creates a List by traversing the entire iterator returned by a call to iterator(). This means that Collection.size() will work correctly, but if the extent represents a large data set, this method may be quite slow and may consume quite a bit of memory.

iterator

Iterator<T> iterator()

Return an iterator over the extent members.

getBroker

Broker getBroker()

The broker that generated the extent.

getElementType

Class<T> getElementType()

The class of extent elements.

hasSubclasses

boolean hasSubclasses()

Whether the extent includes subclasses.

closeAll

void closeAll()

Close all open iterators.

lock

void lock()

Synchronizes on an internal lock.

unlock

void unlock()

Release the internal lock.