org.apache.openjpa.kernel
Class DelegatingSeq

java.lang.Object
  org.apache.openjpa.kernel.DelegatingSeq

All Implemented Interfaces:

Seq, Closeable

public class DelegatingSeq
extends Object
implements Seq

Delegating sequence that can also perform exception translation for use in facades.

Author:

Abe White

Field Summary

Fields inherited from interface org.apache.openjpa.kernel.Seq

TYPE_CONTIGUOUS, TYPE_DEFAULT, TYPE_NONTRANSACTIONAL, TYPE_TRANSACTIONAL

Constructor Summary

DelegatingSeq(Seq seq)
Constructor; supply delegate.

DelegatingSeq(Seq seq, RuntimeExceptionTranslator trans)
Constructor; supply delegate and exception translator.

Method Summary

void	allocate(int additional, StoreContext ctx, ClassMetaData meta) Allocate additional values efficiently.
void	close() Free resources used by this sequence.
Object	current(StoreContext ctx, ClassMetaData meta) Return the current value of the sequence, or null if not available.
boolean	equals(Object other)
Seq	getDelegate() Return the direct delegate.
Seq	getInnermostDelegate() Return the native delegate.
int	hashCode()
Object	next(StoreContext ctx, ClassMetaData meta) Return the next value in the sequence.
void	setType(int type) Set the type of sequence.
protected RuntimeException	translate(RuntimeException re) Translate the OpenJPA exception.

Methods inherited from class java.lang.Object

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

Constructor Detail

DelegatingSeq

public DelegatingSeq(Seq seq)

Constructor; supply delegate.

DelegatingSeq

public DelegatingSeq(Seq seq,
                     RuntimeExceptionTranslator trans)

Constructor; supply delegate and exception translator.

Method Detail

getDelegate

public Seq getDelegate()

Return the direct delegate.

getInnermostDelegate

public Seq getInnermostDelegate()

Return the native delegate.

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object other)

Overrides:

equals in class Object

translate

protected RuntimeException translate(RuntimeException re)

Translate the OpenJPA exception.

setType

public void setType(int type)

Description copied from interface: Seq

Set the type of sequence.

Specified by:

setType in interface Seq

next

public Object next(StoreContext ctx,
                   ClassMetaData meta)

Description copied from interface: Seq

Return the next value in the sequence.

Specified by:

next in interface Seq

Parameters:

ctx - the current context

meta - if this is a datastore identity sequence, the persistent class the identity value is for; else null

current

public Object current(StoreContext ctx,
                      ClassMetaData meta)

Description copied from interface: Seq

Return the current value of the sequence, or null if not available.

Specified by:

current in interface Seq

Parameters:

ctx - the current context

meta - if this is a datastore identity sequence, the persistent class the identity value is for; else null

allocate

public void allocate(int additional,
                     StoreContext ctx,
                     ClassMetaData meta)

Description copied from interface: Seq

Allocate additional values efficiently.

Specified by:

allocate in interface Seq

ctx - the current context

meta - if this is a datastore identity sequence, the persistent class the identity value is for; else null

close

public void close()

Description copied from interface: Seq

Free resources used by this sequence.

Specified by:

close in interface Seq

Specified by:

close in interface Closeable