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java.lang.Objectorg.jpox.store.poid.AbstractPoidGenerator
Abstract POID generator.
Field Summary | |
protected int |
defaultBlockSize
Default block size |
protected static Localiser |
LOCALISER
Localisation of messages |
protected java.lang.String |
name
Symbolic name for the sequence. |
protected PoidBlock |
poidBlock
The current block of ids that have been reserved. |
protected java.util.Properties |
properties
Properties controlling the generator behaviour. |
Constructor Summary | |
AbstractPoidGenerator(java.lang.String name,
java.util.Properties props)
Constructor. |
Method Summary | |
void |
allocate(int additional)
Method to allocate a number of values into the block. |
protected boolean |
createRepository()
Method to create any needed repository for the ids. |
java.lang.Object |
current()
Accessor for the current value allocated. |
long |
currentValue()
Accessor for the current element in the sequence as a long. |
java.lang.String |
getName()
Accessor for the symbolic name for this generator. |
java.lang.Object |
next()
Get next value from the reserved block of values. |
long |
nextValue()
Accessor for the next element in the sequence as a long. |
protected PoidBlock |
obtainPoidBlock()
Get a new PoidBlock with the default number of ids. |
protected PoidBlock |
obtainPoidBlock(int number)
Get a new PoidBlock with the specified number of ids. |
protected boolean |
requiresRepository()
Indicator for whether the generator requires its own repository. |
protected PoidBlock |
reserveBlock()
Method to reserve a default sized block of identities. |
protected abstract PoidBlock |
reserveBlock(long size)
Method to reserve a blobk of "size" ids. |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
protected static final Localiser LOCALISER
protected java.lang.String name
protected java.util.Properties properties
protected int defaultBlockSize
protected PoidBlock poidBlock
Constructor Detail |
public AbstractPoidGenerator(java.lang.String name, java.util.Properties props)
name
- Symbolic name for this generatorprops
- Properties controlling the behaviour of the generator (or null if not required).Method Detail |
public java.lang.String getName()
getName
in interface javax.jdo.datastore.Sequence
public java.lang.Object next()
next
in interface javax.jdo.datastore.Sequence
public java.lang.Object current()
current
in interface javax.jdo.datastore.Sequence
public long nextValue()
nextValue
in interface javax.jdo.datastore.Sequence
javax.jdo.JDODataStoreException
- Thrown if not numericpublic long currentValue()
currentValue
in interface javax.jdo.datastore.Sequence
javax.jdo.JDODataStoreException
- Thrown if not numericpublic void allocate(int additional)
allocate
in interface javax.jdo.datastore.Sequence
additional
- The number to allocateprotected PoidBlock obtainPoidBlock()
protected PoidBlock obtainPoidBlock(int number)
number
- The number of additional ids required
protected PoidBlock reserveBlock()
protected abstract PoidBlock reserveBlock(long size)
size
- Number of ids to reserve
protected boolean requiresRepository()
protected boolean createRepository()
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