IdentifierValue (Hibernate API Documentation) - Hibernate 3.2.4 正式版 API 英文文档

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org.hibernate.engine
Class IdentifierValue

java.lang.Object
  org.hibernate.engine.IdentifierValue

public class IdentifierValue
extends Object

A strategy for determining if an identifier value is an identifier 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

static IdentifierValue ANY
          Always assume the transient instance is newly instantiated

static IdentifierValue NONE
          Never assume the transient instance is newly instantiated

static IdentifierValue NULL
          Assume the transient instance is newly instantiated if the identifier is null.

static IdentifierValue UNDEFINED
          Assume nothing.

Constructor Summary

protected IdentifierValue()


IdentifierValue(Serializable value)
          Assume the transient instance is newly instantiated if its identifier is null or equal to value

Method Summary

Serializable getDefaultValue(Serializable currentValue)


Boolean isUnsaved(Serializable id)
          Does the given identifier belong to a new instance?

String toString()


Methods inherited from class java.lang.Object

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

Field Detail

ANY

public static final IdentifierValue ANY

Always assume the transient instance is newly instantiated

NONE

public static final IdentifierValue NONE

Never assume the transient instance is newly instantiated

NULL

public static final IdentifierValue NULL

Assume the transient instance is newly instantiated if the identifier is null.

UNDEFINED

public static final IdentifierValue UNDEFINED

Assume nothing.

Constructor Detail