Package org.hibernate.generator.internal

Class VersionGeneration

java.lang.Object

org.hibernate.generator.internal.VersionGeneration

All Implemented Interfaces:

Serializable, BeforeExecutionGenerator, Generator

public class VersionGeneration
extends Object
implements BeforeExecutionGenerator

A default Generator for @Version properties. This implementation simply delegates back to:

• VersionJavaType.seed(java.lang.Long, java.lang.Integer, java.lang.Integer, org.hibernate.engine.spi.SharedSessionContractImplementor) to seed an initial version, and
• VersionJavaType.next(T, java.lang.Long, java.lang.Integer, java.lang.Integer, org.hibernate.engine.spi.SharedSessionContractImplementor) to increment a version.

Thus, this implementation reproduces the "classic" behavior of Hibernate. A custom generator specified using a generator annotation will override this implementation, allowing customized versioning.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
VersionGeneration(EntityVersionMapping versionMapping)

Method Summary

Modifier and Type	Method	Description
Object	generate(SharedSessionContractImplementor session, Object owner, Object current, EventType eventType)	Generate a value.
EnumSet<EventType>	getEventTypes()	The event types for which this generator should be called to produce a new value.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.hibernate.generator.BeforeExecutionGenerator

generatedOnExecution

Methods inherited from interface org.hibernate.generator.Generator

allowAssignedIdentifiers, allowMutation, generatedBeforeExecution, generatedOnExecution, generatesOnInsert, generatesOnUpdate, generatesSometimes

Constructor Details

VersionGeneration

public VersionGeneration(EntityVersionMapping versionMapping)

Method Details

getEventTypes

public EnumSet<EventType> getEventTypes()

Description copied from interface: Generator

The event types for which this generator should be called to produce a new value.

Identifier generators must return EventTypeSets.INSERT_ONLY.

Specified by:

getEventTypes in interface Generator

Returns:

a set of EventTypes.

generate

public Object generate(SharedSessionContractImplementor session,
 Object owner,
 Object current,
 EventType eventType)

Description copied from interface: BeforeExecutionGenerator

Generate a value.

Specified by:

generate in interface BeforeExecutionGenerator

Parameters:

session - The session from which the request originates.

owner - The instance of the object owning the attribute for which we are generating a value.

current - The current value assigned to the property, or null

eventType - The type of event that has triggered generation of a new value

Returns:

The generated value