Examples of ValueHolderInterface

org.eclipse.persistence.indirection.ValueHolderInterface
Purpose: Interface to allow lazy loading of an object's relationships from the database. @see ValueHolder @see org.eclipse.persistence.internal.indirection.DatabaseValueHolder

Examples of org.eclipse.persistence.indirection.ValueHolderInterface

     * INTERNAL:
     * Return the value to be stored in the object's attribute.
     * This will be a proxy object.
     */
    public Object valueFromRow(Object object) {
        ValueHolderInterface valueHolder = new ValueHolder(object);


        return ProxyIndirectionHandler.newProxyInstance(object.getClass(), targetInterfaces, valueHolder);
    }

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Examples of org.eclipse.persistence.indirection.ValueHolderInterface

                descriptor = (ClassDescriptor)descriptor.getInterfacePolicy().getChildDescriptors().firstElement();
            }
        } catch (Exception e) {
            return null;
        }
        ValueHolderInterface valueHolder = new QueryBasedValueHolder(query, row, session);


        return ProxyIndirectionHandler.newProxyInstance(descriptor.getJavaClass(), targetInterfaces, valueHolder);
    }

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Examples of org.eclipse.persistence.indirection.ValueHolderInterface

     * Return the value to be stored in the object's attribute.
     * This value is determined by invoking the appropriate method on the object and passing it the
     * row and session.
     */
    public Object valueFromMethod(Object object, AbstractRecord row, AbstractSession session) {
        ValueHolderInterface valueHolder = new TransformerBasedValueHolder(this.getTransformationMapping().getAttributeTransformer(), object, row, session);


        return ProxyIndirectionHandler.newProxyInstance(object.getClass(), targetInterfaces, valueHolder);
    }

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Examples of org.eclipse.persistence.indirection.ValueHolderInterface

        } catch (Exception e) {
            //org.eclipse.persistence.internal.helper.Helper.toDo("*** Should probably throw some sort of TopLink exception here. ***");
            e.printStackTrace();
            return null;
        }
        ValueHolderInterface valueHolder = new BatchValueHolder(batchQuery, row, this.getForeignReferenceMapping(), originalQuery);


        return ProxyIndirectionHandler.newProxyInstance(object.getClass(), targetInterfaces, valueHolder);
    }

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Examples of org.eclipse.persistence.indirection.ValueHolderInterface

     * Return whether the specified object is instantiated.
     */
    public boolean objectIsInstantiated(Object object) {
        if (object instanceof Proxy) {
            ProxyIndirectionHandler handler = (ProxyIndirectionHandler)Proxy.getInvocationHandler(object);
            ValueHolderInterface valueHolder = handler.getValueHolder();
            return valueHolder.isInstantiated();
        } else {
            return true;
        }
    }

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Examples of org.eclipse.persistence.indirection.ValueHolderInterface

     * instantiate the value.
     */
    public Object getRealAttributeValueFromObject(Object obj, Object object) {
        if (object instanceof Proxy) {
            ProxyIndirectionHandler handler = (ProxyIndirectionHandler)Proxy.getInvocationHandler(object);
            ValueHolderInterface valueHolder = handler.getValueHolder();
            return valueHolder.getValue();
        } else {
            return object;
        }
    }

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Examples of org.eclipse.persistence.indirection.ValueHolderInterface

     * INTERNAL:
     * Return the original indirection object for a unit of work indirection object.
     */
    public Object getOriginalIndirectionObject(Object unitOfWorkIndirectionObject, AbstractSession session) {
        if (unitOfWorkIndirectionObject instanceof UnitOfWorkValueHolder) {
            ValueHolderInterface valueHolder = ((UnitOfWorkValueHolder)unitOfWorkIndirectionObject).getWrappedValueHolder();
            if ((valueHolder == null) && session.isRemoteUnitOfWork()) {
                RemoteSessionController controller = ((RemoteUnitOfWork)session).getParentSessionController();
                valueHolder = (ValueHolderInterface)controller.getRemoteValueHolders().get(((UnitOfWorkValueHolder)unitOfWorkIndirectionObject).getWrappedValueHolderRemoteID());
            }
            return valueHolder;

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Examples of org.eclipse.persistence.indirection.ValueHolderInterface

        if ((referenceObject == null) || !Proxy.isProxyClass(referenceObject.getClass())) {
            return null;
        }


        ProxyIndirectionHandler handler = (ProxyIndirectionHandler)Proxy.getInvocationHandler(referenceObject);
        ValueHolderInterface valueHolder = handler.getValueHolder();


        if (valueHolder.isInstantiated()) {
            return null;
        } else {
            return ((DatabaseValueHolder)valueHolder).getRow();
        }
    }

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Examples of org.eclipse.persistence.indirection.ValueHolderInterface

        if (!(attributeValue instanceof Proxy)) {
            boolean isExisting = unitOfWork.isObjectRegistered(clone) && (!unitOfWork.isOriginalNewObject(original));
            return this.getMapping().buildCloneForPartObject(attributeValue, original, clone, unitOfWork, isExisting);
        }


        ValueHolderInterface newValueHolder;
        ProxyIndirectionHandler handler = (ProxyIndirectionHandler)Proxy.getInvocationHandler(attributeValue);
        ValueHolderInterface oldValueHolder = handler.getValueHolder();
        
        if (!buildDirectlyFromRow && unitOfWork.isOriginalNewObject(original)) {
            // CR#3156435 Throw a meaningful exception if a serialized/dead value holder is detected.
            // This can occur if an existing serialized object is attempt to be registered as new.
            if ((oldValueHolder instanceof DatabaseValueHolder)
                    && (! ((DatabaseValueHolder) oldValueHolder).isInstantiated())
                    && (((DatabaseValueHolder) oldValueHolder).getSession() == null)
                    && (! ((DatabaseValueHolder) oldValueHolder).isSerializedRemoteUnitOfWorkValueHolder())) {
                throw DescriptorException.attemptToRegisterDeadIndirection(original, getMapping());
            }
            newValueHolder = new ValueHolder();
            newValueHolder.setValue(this.getMapping().buildCloneForPartObject(oldValueHolder.getValue(), original, clone, unitOfWork, false));
        } else {
          AbstractRecord row = null;
            if (oldValueHolder instanceof DatabaseValueHolder) {
                row = ((DatabaseValueHolder)oldValueHolder).getRow();
            }

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Examples of org.eclipse.persistence.indirection.ValueHolderInterface

    public Object backupCloneAttribute(Object attributeValue, Object clone, Object backup, UnitOfWorkImpl unitOfWork) {
        if (!(attributeValue instanceof Proxy)) {
            return this.getMapping().buildBackupCloneForPartObject(attributeValue, clone, backup, unitOfWork);
        }
        ProxyIndirectionHandler handler = (ProxyIndirectionHandler)Proxy.getInvocationHandler(attributeValue);
        ValueHolderInterface unitOfWorkValueHolder = handler.getValueHolder();
        ValueHolderInterface backupValueHolder = null;
        
        if ((!(unitOfWorkValueHolder instanceof UnitOfWorkValueHolder)) || unitOfWorkValueHolder.isInstantiated()) {
            backupValueHolder = (ValueHolderInterface) super.backupCloneAttribute(unitOfWorkValueHolder, clone, backup, unitOfWork);
        } else {
            // CR#2852176 Use a BackupValueHolder to handle replacing of the original.

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