Package org.datanucleus.store

Class AbstractExtent<T>

java.lang.Object

org.datanucleus.store.AbstractExtent<T>

All Implemented Interfaces:

Extent<T>

Direct Known Subclasses:

DefaultCandidateExtent

public abstract class AbstractExtent<T>
extends Object
implements Extent<T>

Abstract representation of a JDO Extent. Suitable for use with all datastores.

Field Summary

Fields

Modifier and Type	Field	Description
protected Class<T>	candidateClass	The candidate class.
protected AbstractClassMetaData	cmd	ClassMetaData for the candidate class.
protected ExecutionContext	ec	ExecutionContext
protected boolean	subclasses	Whether to include subclasses.

Constructor Summary

Constructors

Constructor	Description
AbstractExtent(ExecutionContext ec, Class<T> cls, boolean subclasses, AbstractClassMetaData cmd)	Constructor.

Method Summary

Modifier and Type	Method	Description
Class<T>	getCandidateClass()	Accessor for the class of instances in this Extent.
ExecutionContext	getExecutionContext()	Accessor for the owning execution context.
boolean	hasSubclasses()	Returns whether this Extent was defined to contain subclasses.
String	toString()	Stringifier method.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.datanucleus.store.Extent

close, closeAll, getFetchPlan, iterator

Field Detail

ec

protected final ExecutionContext ec

ExecutionContext

candidateClass

protected final Class<T> candidateClass

The candidate class. We store the class since we need to retain it for class loading.

subclasses

protected final boolean subclasses

Whether to include subclasses.

cmd

protected final AbstractClassMetaData cmd

ClassMetaData for the candidate class.

Constructor Detail

AbstractExtent

public AbstractExtent(ExecutionContext ec,
                      Class<T> cls,
                      boolean subclasses,
                      AbstractClassMetaData cmd)

Constructor.

Parameters:

ec - Execution Context

cls - candidate class

subclasses - Whether to include subclasses

cmd - MetaData for the candidate class

Method Detail

hasSubclasses

public boolean hasSubclasses()

Returns whether this Extent was defined to contain subclasses.

Specified by:

hasSubclasses in interface Extent<T>

Returns:

true if this Extent was defined to include subclasses.

getCandidateClass

public Class<T> getCandidateClass()

Accessor for the class of instances in this Extent.

Specified by:

getCandidateClass in interface Extent<T>

Returns:

the Class of instances of this Extent

getExecutionContext

public ExecutionContext getExecutionContext()

Accessor for the owning execution context.

Specified by:

getExecutionContext in interface Extent<T>

Returns:

execution context

toString

public String toString()

Stringifier method.

Overrides:

toString in class Object

Returns:

Stringified form of this object