Package org.eclipse.persistence.internal.indirection

Class NoIndirectionPolicy

  • All Implemented Interfaces:
    java.io.Serializable, java.lang.Cloneable
    public class NoIndirectionPolicy
extends IndirectionPolicy

    Purpose

    : NoIndirectionPolicy implements the behavior necessary for a a ForeignReferenceMapping (or TransformationMapping) to directly use domain objects, as opposed to ValueHolders.
    Since:
    TOPLink/Java 2.5
    Author:
    Mike Norman
    See Also:
    ForeignReferenceMapping, Serialized Form

    • Constructor Detail

      • NoIndirectionPolicy

        public NoIndirectionPolicy()
        INTERNAL: Construct a new indirection policy.

    • Method Detail

      • buildIndirectObject

        public java.lang.Object buildIndirectObject​(ValueHolderInterface valueHolder)
        INTERNAL: This method can be used when an Indirection Object is required to be built from a provided ValueHolderInterface object. This may be used for custom value holder types. Certain policies like the TransparentIndirectionPolicy may wrap the valueholder in another object.
        Specified by:
        buildIndirectObject in class IndirectionPolicy

      • cloneAttribute

        public java.lang.Object cloneAttribute​(java.lang.Object attributeValue,
                                       java.lang.Object original,
                                       CacheKey cacheKey,
                                       java.lang.Object clone,
                                       java.lang.Integer refreshCascade,
                                       AbstractSession cloningSession,
                                       boolean buildDirectlyFromRow)
        INTERNAL: Return a clone of the attribute.
        Specified by:
        cloneAttribute in class IndirectionPolicy
        Parameters:
        buildDirectlyFromRow - indicates that we are building the clone directly from a row as opposed to building the original from the row, putting it in the shared cache, and then cloning the original.

      • collectionTypeIsValid

        protected boolean collectionTypeIsValid​(java.lang.Class collectionType)
        INTERNAL: Return whether the collection type is appropriate for the indirection policy. In this case, the type MUST be a Vector (or, in the case of jdk1.2, Collection or Map).

      • extractReferenceRow

        public AbstractRecord extractReferenceRow​(java.lang.Object referenceObject)
        INTERNAL: Return the reference row for the reference object. This allows the new row to be built without instantiating the reference object. Return null if the object has already been instantiated.
        Specified by:
        extractReferenceRow in class IndirectionPolicy

      • fixObjectReferences

        public void fixObjectReferences​(java.lang.Object object,
                                java.util.Map objectDescriptors,
                                java.util.Map processedObjects,
                                ObjectLevelReadQuery query,
                                DistributedSession session)
        INTERNAL: An object has been serialized from the server to the client. Replace the transient attributes of the remote value holders with client-side objects.
        Specified by:
        fixObjectReferences in class IndirectionPolicy

      • getOriginalIndirectionObject

        public java.lang.Object getOriginalIndirectionObject​(java.lang.Object unitOfWorkIndirectionObject,
                                                     AbstractSession session)
        INTERNAL: Return the original indirection object for a unit of work indirection object.
        Specified by:
        getOriginalIndirectionObject in class IndirectionPolicy

      • getOriginalValueHolder

        public java.lang.Object getOriginalValueHolder​(java.lang.Object unitOfWorkIndirectionObject,
                                               AbstractSession session)
        INTERNAL: Return the original valueHolder object. Access to the underlying valueholder may be required when serializing the valueholder or converting the valueHolder to another type.
        Specified by:
        getOriginalValueHolder in class IndirectionPolicy

      • getRealAttributeValueFromObject

        public java.lang.Object getRealAttributeValueFromObject​(java.lang.Object object,
                                                        java.lang.Object attribute)
        INTERNAL: Return the "real" attribute value, as opposed to any wrapper. This will trigger the wrapper to instantiate the value.
        Specified by:
        getRealAttributeValueFromObject in class IndirectionPolicy

      • mergeRemoteValueHolder

        public void mergeRemoteValueHolder​(java.lang.Object clientSideDomainObject,
                                   java.lang.Object serverSideDomainObject,
                                   MergeManager mergeManager)
        INTERNAL Replace the client value holder with the server value holder, after copying some of the settings from the client value holder.
        Specified by:
        mergeRemoteValueHolder in class IndirectionPolicy

      • nullValueFromRow

        public java.lang.Object nullValueFromRow()
        INTERNAL: Return the null value of the appropriate attribute. That is, the field from the database is NULL, return what should be placed in the object's attribute as a result.
        Specified by:
        nullValueFromRow in class IndirectionPolicy

      • objectIsInstantiated

        public boolean objectIsInstantiated​(java.lang.Object object)
        INTERNAL: Return whether the specified object is instantiated.
        Specified by:
        objectIsInstantiated in class IndirectionPolicy

      • objectIsEasilyInstantiated

        public boolean objectIsEasilyInstantiated​(java.lang.Object object)
        INTERNAL: Return whether the specified object can be instantiated without database access.
        Specified by:
        objectIsEasilyInstantiated in class IndirectionPolicy

      • typeIsValid

        protected boolean typeIsValid​(java.lang.Class attributeType)
        INTERNAL: Return whether the type is appropriate for the indirection policy. In this case, the attribute type CANNOT be ValueHolderInterface.

      • usesIndirection

        public boolean usesIndirection()
        INTERNAL: Return whether the indirection policy actually uses indirection. Here, we must reply false.
        Overrides:
        usesIndirection in class IndirectionPolicy

      • valueFromMethod

        public java.lang.Object valueFromMethod​(java.lang.Object object,
                                        AbstractRecord row,
                                        AbstractSession session)
        INTERNAL: Return the value to be stored in the object's attribute. This value is determined by invoking the mapping's AttributeTransformer
        Specified by:
        valueFromMethod in class IndirectionPolicy

      • valueFromQuery

        public java.lang.Object valueFromQuery​(ReadQuery query,
                                       AbstractRecord row,
                                       java.lang.Object sourceObject,
                                       AbstractSession session)
        INTERNAL: Return the value to be stored in the object's attribute. This value is determined by the query. In this case, wrap the query in a ValueHolder for later invocation.
        Specified by:
        valueFromQuery in class IndirectionPolicy

      • valueFromQuery

        public java.lang.Object valueFromQuery​(ReadQuery query,
                                       AbstractRecord row,
                                       AbstractSession session)
        INTERNAL: Return the value to be stored in the object's attribute. This value is determined by the query. In this case, simply execute the query and return its results.
        Specified by:
        valueFromQuery in class IndirectionPolicy

      • valueFromRow

        public java.lang.Object valueFromRow​(java.lang.Object object)
        INTERNAL: Return the value to be stored in the object's attribute. This value is determined by the row. In this case, simply return the object.
        Specified by:
        valueFromRow in class IndirectionPolicy

      • setRealAttributeValueInObject

        public void setRealAttributeValueInObject​(java.lang.Object target,
                                          java.lang.Object attributeValue,
                                          boolean trackChanges)
        Set the value of the appropriate attribute of target to attributeValue. In this case, place the value inside the target's ValueHolder. if trackChanges is true, set the value in the object as if the user was setting it. Allow change tracking to pick up the change.
        Overrides:
        setRealAttributeValueInObject in class IndirectionPolicy