Module org.eclipse.persistence.core
Class ProtectedValueHolder<T>
- java.lang.Object
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- org.eclipse.persistence.internal.indirection.DatabaseValueHolder<T>
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- org.eclipse.persistence.internal.indirection.ProtectedValueHolder<T>
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- 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
- Author:
- Gordon Yorke
- See Also:
- Serialized Form
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Field Summary
Fields Modifier and Type Field Description protected DatabaseMappingmappingprotected ValueHolderInterface<T>wrappedValueHolder-
Fields inherited from class org.eclipse.persistence.internal.indirection.DatabaseValueHolder
isCoordinatedWithProperty, isInstantiated, row, session, value
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Fields inherited from interface org.eclipse.persistence.indirection.ValueHolderInterface
shouldToStringInstantiate
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Constructor Summary
Constructors Constructor Description ProtectedValueHolder(ValueHolderInterface<T> attributeValue, DatabaseMapping mapping, AbstractSession cloningSession)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description ValueHolderInterface<T>getWrappedValueHolder()Returns the valueholder that is wrapped by this ValueHolderprotected Tinstantiate()Instantiate the object.TinstantiateForUnitOfWorkValueHolder(UnitOfWorkValueHolder<T> unitOfWorkValueHolder)Triggers UnitOfWork valueholders directly without triggering the wrapped valueholder (this).booleanisPessimisticLockingValueHolder()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 Detail
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wrappedValueHolder
protected transient ValueHolderInterface<T> wrappedValueHolder
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mapping
protected transient DatabaseMapping mapping
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Constructor Detail
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ProtectedValueHolder
public ProtectedValueHolder(ValueHolderInterface<T> attributeValue, DatabaseMapping mapping, AbstractSession cloningSession)
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Method Detail
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instantiate
protected T instantiate() throws DatabaseException
Description copied from class:DatabaseValueHolderInstantiate the object.- Specified by:
instantiatein classDatabaseValueHolder<T>- Throws:
DatabaseException
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instantiateForUnitOfWorkValueHolder
public T instantiateForUnitOfWorkValueHolder(UnitOfWorkValueHolder<T> unitOfWorkValueHolder)
Description copied from class:DatabaseValueHolderTriggers 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:
instantiateForUnitOfWorkValueHolderin classDatabaseValueHolder<T>
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isPessimisticLockingValueHolder
public boolean isPessimisticLockingValueHolder()
Description copied from class:DatabaseValueHolderAnswers 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:
isPessimisticLockingValueHolderin classDatabaseValueHolder<T>
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getWrappedValueHolder
public ValueHolderInterface<T> getWrappedValueHolder()
Description copied from interface:WrappingValueHolderReturns the valueholder that is wrapped by this ValueHolder- Specified by:
getWrappedValueHolderin interfaceWrappingValueHolder<T>- Overrides:
getWrappedValueHolderin classDatabaseValueHolder<T>
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