org.nakedobjects.metamodel.adapter.version
Class NullVersion

java.lang.Object
  org.nakedobjects.metamodel.adapter.version.NullVersion

All Implemented Interfaces:

Version

public class NullVersion
extends java.lang.Object
implements Version

Constructor Summary

NullVersion()

Method Summary

boolean	different(Version version) Compares this version against the specified version and returns true if they are different versions.
java.util.Date	getTime() Returns the time of the last change.
java.lang.String	getUser() Returns the user who made the last change.
Version	next(java.lang.String user, java.util.Date time)
java.lang.String	sequence() Returns the sequence for printing/display

Methods inherited from class java.lang.Object

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

Constructor Detail

NullVersion

public NullVersion()

Method Detail

different

public boolean different(Version version)

Description copied from interface: Version

Compares this version against the specified version and returns true if they are different versions.

This is use for optimistic checking, where the existence of a different version will normally cause a concurrency exception.

Specified by:

different in interface Version

next

public Version next(java.lang.String user,
                    java.util.Date time)

getUser

public java.lang.String getUser()

Description copied from interface: Version

Returns the user who made the last change.

Specified by:

getUser in interface Version

getTime

public java.util.Date getTime()

Description copied from interface: Version

Returns the time of the last change.

Specified by:

getTime in interface Version

sequence

public java.lang.String sequence()

Description copied from interface: Version

Returns the sequence for printing/display

Specified by:

sequence in interface Version