程序包 org.hibernate.engine.internal

类 Versioning

java.lang.Object

org.hibernate.engine.internal.Versioning

public final class Versioning
extends Object

Utilities for dealing with optimistic locking values.

作者:

Gavin King

方法概要

修饰符和类型	方法	说明
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, SharedSessionContractImplementor 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, SharedSessionContractImplementor 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.

从类继承的方法 java.lang.Object

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

方法详细资料

seedVersion

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

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

参数:

fields - The current snapshot state

versionProperty - The index of the version property

versionType - The version type

session - The originating session

返回:

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

increment

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

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

参数:

version - The current version

versionType - The version type

session - The originating session

返回:

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.

参数:

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.

参数:

fields - The state snapshot

persister - The entity persister

返回:

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?

参数:

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.

返回:

True if a version increment is required; false otherwise.