org.hibernate.engine.internal

Class Versioning

java.lang.Object

org.hibernate.engine.internal.Versioning

public final class Versioning
extends Object

Utilities for dealing with optimistic locking values.

Author:

Gavin King

Method Summary

Modifier and Type	Method and Description
static Object	getVersion(Object[] fields, EntityPersister persister) Extract the optimistic locking value out of the entity state snapshot.
static Object	increment(Object version, VersionType versionType, SessionImplementor session) Generate the next increment in the optimistic locking value according the VersionType contract for the version property.
static boolean	isVersionIncrementRequired(int[] dirtyProperties, boolean hasDirtyCollections, boolean[] propertyVersionability) Do we need to increment the version number, given the dirty properties?
static boolean	seedVersion(Object[] fields, int versionProperty, VersionType versionType, SessionImplementor session) Create an initial optimistic locking value according the VersionType contract for the version property if required and inject it into the snapshot state.
static void	setVersion(Object[] fields, Object version, EntityPersister persister) Inject the optimistic locking value into the entity state snapshot.

Methods inherited from class java.lang.Object

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

Method Detail

seedVersion

public static boolean seedVersion(Object[] fields,
                                  int versionProperty,
                                  VersionType versionType,
                                  SessionImplementor session)

Create an initial optimistic locking value according the VersionType contract for the version property if required and inject it into the snapshot state.

Parameters:

fields - The current snapshot state

versionProperty - The index of the version property

versionType - The version type

session - The originating session

Returns:

True if we injected a new version value into the fields array; false otherwise.

increment

public static Object increment(Object version,
                               VersionType versionType,
                               SessionImplementor session)

Generate the next increment in the optimistic locking value according the VersionType contract for the version property.

Parameters:

version - The current version

versionType - The version type

session - The originating session

Returns:

The incremented optimistic locking value.

setVersion

public static void setVersion(Object[] fields,
                              Object version,
                              EntityPersister persister)

Inject the optimistic locking value into the entity state snapshot.

Parameters:

fields - The state snapshot

version - The optimistic locking value

persister - The entity persister

getVersion

public static Object getVersion(Object[] fields,
                                EntityPersister persister)

Extract the optimistic locking value out of the entity state snapshot.

Parameters:

fields - The state snapshot

persister - The entity persister

Returns:

The extracted optimistic locking value

isVersionIncrementRequired

public static boolean isVersionIncrementRequired(int[] dirtyProperties,
                                                 boolean hasDirtyCollections,
                                                 boolean[] propertyVersionability)

Do we need to increment the version number, given the dirty properties?

Parameters:

dirtyProperties - The array of property indexes which were deemed dirty

hasDirtyCollections - Were any collections found to be dirty (structurally changed)

propertyVersionability - An array indicating versionability of each property.

Returns:

True if a version increment is required; false otherwise.