org.axiondb
Class Sequence

java.lang.Object
  org.axiondb.NamedIdentifier
      org.axiondb.Literal
          org.axiondb.Sequence

All Implemented Interfaces:

Selectable, Serializable

public class Sequence

extends Literal

implements Selectable

A database sequence. A sequence provides a mechanism for obtaining unique integer values from the database.

Version:

$Revision: 1.10 $ $Date: 2004/08/27 03:21:20 $

See Also:

Serialized Form

Constructor Summary

Sequence(String name)
Create a equence starting whose initial value is 0.

Sequence(String name, int startVal)
Create a equence starting whose initial value is startVal .

Method Summary

void	addSequenceModificationListener(SequenceModificationListener listener)
Object	evaluate() Increment and return the next value in this sequence.
String	getName() Get the name of this sequence.
Object	getValue() Get the current value of this sequence.

Methods inherited from class org.axiondb.Literal

equals, evaluate, getAlias, getDataType, getLabel, hashCode, setAlias, setDataType, setValue, setVariableContext, toString

Methods inherited from class org.axiondb.NamedIdentifier

toUpperOrNull

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.axiondb.Selectable

evaluate, getAlias, getDataType, getLabel, setVariableContext

Constructor Detail

Sequence

public Sequence(String name)

Create a equence starting whose initial value is 0.

Sequence

public Sequence(String name,
                int startVal)

Create a equence starting whose initial value is startVal .

Method Detail

addSequenceModificationListener

public void addSequenceModificationListener(SequenceModificationListener listener)

evaluate

public Object evaluate()
                throws AxionException

Increment and return the next value in this sequence.

Overrides:

evaluate in class Literal

Throws:

AxionException

getName

public String getName()

Get the name of this sequence.

Specified by:

getName in interface Selectable

Overrides:

getName in class Literal

getValue

public Object getValue()
                throws AxionException

Get the current value of this sequence.

Overrides:

getValue in class Literal

Throws:

AxionException