org.apache.commons.betwixt.io.id

Class AbstractIDGenerator

java.lang.Object

org.apache.commons.betwixt.io.id.AbstractIDGenerator

All Implemented Interfaces:

IDGenerator

Direct Known Subclasses:

RandomIDGenerator, SequentialIDGenerator

public abstract class AbstractIDGenerator
extends Object
implements IDGenerator

Abstract superclass for IDGenerator implementations.

It implements the entire IDGenerator interface. When nextId is called, this class sets the LastId property (as well as returning the value). Subclasses should override nextIdImpl().

Version:

$Revision: 438373 $

Author:

Robert Burrell Donkin

Constructor Summary

Constructors

Constructor and Description
AbstractIDGenerator()

Method Summary

Methods

Modifier and Type	Method and Description
String	getLastId() Gets last ID returned.
String	nextId() Generate next ID.
protected abstract String	nextIdImpl() Subclasses should provide an implementation for this method.

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractIDGenerator

public AbstractIDGenerator()

Method Detail

getLastId

public final String getLastId()

Gets last ID returned.

Specified by:

getLastId in interface IDGenerator

Returns:

the last id created by the generated

nextId

public final String nextId()

Generate next ID.

This method obtains the next ID from subclass and then uses this to set the LastId property.

Specified by:

nextId in interface IDGenerator

Returns:

the next id generated

nextIdImpl

protected abstract String nextIdImpl()

Subclasses should provide an implementation for this method. This implementation needs only provide the next ID value (according to it's algorithm). Setting the LastId property can be left to this class.

Returns:

the next id generated