org.hibernate.engine

Class VersionValue

java.lang.Object

org.hibernate.engine.VersionValue

public class VersionValue
extends java.lang.Object

A strategy for determining if a version value is an version of a new transient instance or a previously persistent transient instance. The strategy is determined by the unsaved-value attribute in the mapping file.

Author:

Gavin King

Field Summary

Fields

Modifier and Type	Field and Description
static VersionValue	NEGATIVE Assume the transient instance is newly instantiated if the version is negative, otherwise assume it is a detached instance.
static VersionValue	NULL Assume the transient instance is newly instantiated if the version is null, otherwise assume it is a detached instance.
static VersionValue	UNDEFINED Assume the transient instance is newly instantiated if the version is null, otherwise defer to the identifier unsaved-value.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	VersionValue()
	VersionValue(java.lang.Object value) Assume the transient instance is newly instantiated if its version is null or equal to value

Method Summary

Methods

Modifier and Type	Method and Description
java.lang.Object	getDefaultValue(java.lang.Object currentValue)
java.lang.Boolean	isUnsaved(java.lang.Object version) Does the given version belong to a new instance?
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

NULL

public static final VersionValue NULL

Assume the transient instance is newly instantiated if the version is null, otherwise assume it is a detached instance.

UNDEFINED

public static final VersionValue UNDEFINED

Assume the transient instance is newly instantiated if the version is null, otherwise defer to the identifier unsaved-value.

NEGATIVE

public static final VersionValue NEGATIVE

Assume the transient instance is newly instantiated if the version is negative, otherwise assume it is a detached instance.

Constructor Detail

VersionValue

protected VersionValue()

VersionValue

public VersionValue(java.lang.Object value)

Assume the transient instance is newly instantiated if its version is null or equal to value

Parameters:

value - value to compare to

Method Detail

isUnsaved

public java.lang.Boolean isUnsaved(java.lang.Object version)
                            throws MappingException

Does the given version belong to a new instance?

Parameters:

version - version to check

Returns:

true is unsaved, false is saved, null is undefined

Throws:

MappingException

getDefaultValue

public java.lang.Object getDefaultValue(java.lang.Object currentValue)

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object