org.datanucleus.api.jdo

Class JDOSequence

java.lang.Object

org.datanucleus.api.jdo.JDOSequence

All Implemented Interfaces:

javax.jdo.datastore.Sequence, org.datanucleus.store.NucleusSequence

public class JDOSequence
extends Object
implements javax.jdo.datastore.Sequence, org.datanucleus.store.NucleusSequence

Basic generic implementation of a JDO2 datastore sequence. Wraps a NucleusSequence.

Field Summary

Fields

Modifier and Type	Field and Description
protected org.datanucleus.store.NucleusSequence	sequence Underlying NucleusSequence.

Constructor Summary

Constructors

Constructor and Description
JDOSequence(org.datanucleus.store.NucleusSequence seq) Constructor.

Method Summary

Modifier and Type	Method and Description
void	allocate(int additional) Method to allocate a set of elements.
Object	current() Accessor for the current element.
long	currentValue() Accessor for the current element in the sequence as a long.
String	getName() Accessor for the sequence name.
Object	next() Accessor for the next element in the sequence.
long	nextValue() Accessor for the next element in the sequence as a long.

Methods inherited from class java.lang.Object

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

Field Detail

sequence

protected org.datanucleus.store.NucleusSequence sequence

Underlying NucleusSequence.

Constructor Detail

JDOSequence

public JDOSequence(org.datanucleus.store.NucleusSequence seq)

Constructor.

Parameters:

seq - Underlying sequence

Method Detail

getName

public String getName()

Accessor for the sequence name.

Specified by:

getName in interface javax.jdo.datastore.Sequence

Specified by:

getName in interface org.datanucleus.store.NucleusSequence

Returns:

The sequence name

allocate

public void allocate(int additional)

Method to allocate a set of elements.

Specified by:

allocate in interface javax.jdo.datastore.Sequence

Specified by:

allocate in interface org.datanucleus.store.NucleusSequence

Parameters:

additional - The number of additional elements to allocate

next

public Object next()

Accessor for the next element in the sequence.

Specified by:

next in interface javax.jdo.datastore.Sequence

Specified by:

next in interface org.datanucleus.store.NucleusSequence

Returns:

The next element

nextValue

public long nextValue()

Accessor for the next element in the sequence as a long.

Specified by:

nextValue in interface javax.jdo.datastore.Sequence

Specified by:

nextValue in interface org.datanucleus.store.NucleusSequence

Returns:

The next element

Throws:

javax.jdo.JDODataStoreException - Thrown if not numeric

current

public Object current()

Accessor for the current element.

Specified by:

current in interface javax.jdo.datastore.Sequence

Specified by:

current in interface org.datanucleus.store.NucleusSequence

Returns:

The current element.

currentValue

public long currentValue()

Accessor for the current element in the sequence as a long.

Specified by:

currentValue in interface javax.jdo.datastore.Sequence

Specified by:

currentValue in interface org.datanucleus.store.NucleusSequence

Returns:

The current element

Throws:

javax.jdo.JDODataStoreException - Thrown if not numeric