Module org.eclipse.persistence.core
Class ProtectedValueHolder<T>
java.lang.Object
org.eclipse.persistence.internal.indirection.DatabaseValueHolder<T>
org.eclipse.persistence.internal.indirection.ProtectedValueHolder<T>
- All Implemented Interfaces:
Serializable
,Cloneable
,ValueHolderInterface<T>
,WeavedAttributeValueHolderInterface<T>
,WrappingValueHolder<T>
public class ProtectedValueHolder<T>
extends DatabaseValueHolder<T>
implements WrappingValueHolder<T>
Purpose: provides a value holder type that can be used in Protected instances of Entities. Similar to UnitOfWork Value Holder it wraps the original cache version.
- Since:
- EclipseLink 2.2
- See Also:
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Field Summary
Fields inherited from class org.eclipse.persistence.internal.indirection.DatabaseValueHolder
isCoordinatedWithProperty, isInstantiated, row, session, value
Fields inherited from interface org.eclipse.persistence.indirection.ValueHolderInterface
shouldToStringInstantiate
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Constructor Summary
ConstructorDescriptionProtectedValueHolder
(ValueHolderInterface<T> attributeValue, DatabaseMapping mapping, AbstractSession cloningSession) -
Method Summary
Modifier and TypeMethodDescriptionReturns the valueholder that is wrapped by this ValueHolderprotected T
Instantiate the object.instantiateForUnitOfWorkValueHolder
(UnitOfWorkValueHolder<T> unitOfWorkValueHolder) Triggers UnitOfWork valueholders directly without triggering the wrapped valueholder (this).boolean
Answers if this valueholder is a pessimistic locking one.Methods inherited from class org.eclipse.persistence.internal.indirection.DatabaseValueHolder
clone, getRow, getSession, getValue, getValue, isCoordinatedWithProperty, isEasilyInstantiated, isInstantiated, isNewlyWeavedValueHolder, isSerializedRemoteUnitOfWorkValueHolder, isTransactionalValueHolder, postInstantiate, privilegedSetValue, releaseWrappedValueHolder, resetFields, setInstantiated, setIsCoordinatedWithProperty, setIsNewlyWeavedValueHolder, setRow, setSession, setUninstantiated, setValue, shouldAllowInstantiationDeferral, toString
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Field Details
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wrappedValueHolder
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mapping
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Constructor Details
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ProtectedValueHolder
public ProtectedValueHolder(ValueHolderInterface<T> attributeValue, DatabaseMapping mapping, AbstractSession cloningSession)
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Method Details
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instantiate
Description copied from class:DatabaseValueHolder
Instantiate the object.- Specified by:
instantiate
in classDatabaseValueHolder<T>
- Throws:
DatabaseException
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instantiateForUnitOfWorkValueHolder
Description copied from class:DatabaseValueHolder
Triggers UnitOfWork valueholders directly without triggering the wrapped valueholder (this).When in transaction and/or for pessimistic locking the UnitOfWorkValueHolder needs to be triggered directly without triggering the wrapped valueholder. However only the wrapped valueholder knows how to trigger the indirection, i.e. it may be a batchValueHolder, and it stores all the info like the row and the query. Note: Implementations of this method are not necessarily thread-safe. They must be used in a synchronized manner
- Specified by:
instantiateForUnitOfWorkValueHolder
in classDatabaseValueHolder<T>
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isPessimisticLockingValueHolder
public boolean isPessimisticLockingValueHolder()Description copied from class:DatabaseValueHolder
Answers if this valueholder is a pessimistic locking one. Such valueholders are special in that they can be triggered multiple times by different UnitsOfWork. Each time a lock query will be issued. Hence even if instantiated it may have to be instantiated again, and once instantiated all fields can not be reset. Note: Implementations of this method are not necessarily thread-safe. They must be used in a synchronizaed manner- Specified by:
isPessimisticLockingValueHolder
in classDatabaseValueHolder<T>
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getWrappedValueHolder
Description copied from interface:WrappingValueHolder
Returns the valueholder that is wrapped by this ValueHolder- Specified by:
getWrappedValueHolder
in interfaceWrappingValueHolder<T>
- Overrides:
getWrappedValueHolder
in classDatabaseValueHolder<T>
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