org.datanucleus.store.neodatis

Class NeoDatisExtent

java.lang.Object

org.datanucleus.store.AbstractExtent

org.datanucleus.store.neodatis.NeoDatisExtent

All Implemented Interfaces:

org.datanucleus.store.Extent

public class NeoDatisExtent
extends org.datanucleus.store.AbstractExtent

Extent for use with NeoDatis datastores. The Extent is generated in two ways, with or without subclasses. These simply execute a NeoDatis Criteria query setting the "polymorphic" flag.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	NeoDatisExtent.NeoDatisExtentIterator Iterator for use with NeoDatis Extents.

Field Summary

Fields inherited from class org.datanucleus.store.AbstractExtent

candidateClass, cmd, ec, subclasses

Constructor Summary

Constructors

Constructor and Description
NeoDatisExtent(NeoDatisStoreManager storeMgr, org.datanucleus.ExecutionContext ec, Class cls, boolean subclasses, org.datanucleus.metadata.AbstractClassMetaData cmd) Constructor.

Method Summary

Modifier and Type	Method and Description
void	close(Iterator iter) Method to close the extent.
void	closeAll() Close all Iterators associated with this Extent instance.
org.datanucleus.FetchPlan	getFetchPlan() This method retrieves the fetch plan associated with the Extent.
Iterator	iterator() Returns an iterator over all the instances in the Extent.

Methods inherited from class org.datanucleus.store.AbstractExtent

getCandidateClass, getExecutionContext, hasSubclasses, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

NeoDatisExtent

public NeoDatisExtent(NeoDatisStoreManager storeMgr,
                      org.datanucleus.ExecutionContext ec,
                      Class cls,
                      boolean subclasses,
                      org.datanucleus.metadata.AbstractClassMetaData cmd)

Constructor.

Parameters:

storeMgr - StoreManager

ec - execution context

cls - candidate class

subclasses - Whether to include subclasses

cmd - MetaData for the candidate class

Method Detail

close

public void close(Iterator iter)

Method to close the extent.

Parameters:

iter - an iterator obtained by the method iterator() on this Extent instance.

closeAll

public void closeAll()

Close all Iterators associated with this Extent instance. Iterators closed by this method will return false to hasNext() and will throw NoSuchElementException on next(). The Extent instance can still be used as a parameter of Query.setCandidates, and to get an Iterator.

iterator

public Iterator iterator()

Returns an iterator over all the instances in the Extent.

Returns:

an iterator over all the instances in the Extent.

getFetchPlan

public org.datanucleus.FetchPlan getFetchPlan()

This method retrieves the fetch plan associated with the Extent. It always returns the identical instance for the same Extent instance. Any change made to the fetch plan affects subsequent instance retrievals via next(). Only instances not already in memory are affected by the fetch plan. Fetch plan is described in Section 12.7.

Returns:

the FetchPlan