Examples of org.eclipse.persistence.descriptors.changetracking.ObjectChangePolicy

Package org.eclipse.persistence.descriptors.changetracking

Examples of org.eclipse.persistence.descriptors.changetracking.ObjectChangePolicy

org.eclipse.persistence.descriptors.changetracking.ObjectChangePolicy
INTERNAL: Implementers of ObjectChangePolicy implement the code which computes changes sets for the UnitOfWork commit process. An ObjectChangePolicy is stored on an Object's descriptor. @see DeferredChangeDetectionPolicy @see ObjectChangeTrackingPolicy @see AttributeChangeTrackingPolicy @author Tom Ware

        // Finally, update clone's fetch group reference.
        setObjectFetchGroup(workingClone, union, uow);
        if (workingClone != backupClone) {
            setObjectFetchGroup(backupClone, union, uow);
        }
        ObjectChangePolicy policy = descriptor.getObjectChangePolicy();
        // Turn it 'off' to prevent unwanted events.
        policy.dissableEventProcessing(workingClone);
        try {
            //if refresh is set, force to fill in fetch group data
            if (((FetchGroupTracker)partialObject)._persistence_shouldRefreshFetchGroup()) {
                //refresh and fill in the fetch group data
                refreshFetchGroupIntoClones(partialObject, workingClone, backupClone, fetchGroupInObject, fetchGroupInClone, uow);
            } else {//no refresh is enforced
                //revert the unfetched attributes of the clones.
                revertDataIntoUnfetchedAttributesOfClones(partialObject, workingClone, backupClone, fetchGroupInObject, fetchGroupInClone, uow);
            }
        } finally {
            policy.enableEventProcessing(workingClone);
        }
    }

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        // Finally, update clone's fetch group reference.
        setObjectFetchGroup(workingClone, union, uow);
        if (workingClone != backupClone) {
            setObjectFetchGroup(backupClone, union, uow);
        }
        ObjectChangePolicy policy = descriptor.getObjectChangePolicy();
        // Turn it 'off' to prevent unwanted events.
        policy.dissableEventProcessing(workingClone);
        try {
            //if refresh is set, force to fill in fetch group data
            if (((FetchGroupTracker)partialObject)._persistence_shouldRefreshFetchGroup()) {
                //refresh and fill in the fetch group data
                refreshFetchGroupIntoClones(partialObject, workingClone, backupClone, fetchGroupInObject, fetchGroupInClone, uow);
            } else {//no refresh is enforced
                //revert the unfetched attributes of the clones.
                revertDataIntoUnfetchedAttributesOfClones(partialObject, workingClone, backupClone, fetchGroupInObject, fetchGroupInClone, uow);
            }
        } finally {
            policy.enableEventProcessing(workingClone);
        }
    }

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        // Set the change tracking flag on the Metadata Descriptor.
        descriptor.setHasChangeTracking();
        
        // Process the change tracking metadata.
        ClassDescriptor classDescriptor = descriptor.getClassDescriptor();
        ObjectChangePolicy policy = null;
                   
        if (m_type.equals(ChangeTrackingType.ATTRIBUTE.name())) {
            policy = new AttributeChangeTrackingPolicy();
        } else if (m_type.equals(ChangeTrackingType.OBJECT.name())) {
            policy = new ObjectChangeTrackingPolicy();

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            if (wasAClone && (unitOfWorkCacheKey.getLastUpdatedQueryId() >= query.getQueryId())) {
                return workingClone;
            }
            copyQueryInfoToCacheKey(unitOfWorkCacheKey, query, databaseRow, unitOfWork, descriptor);
            
            ObjectChangePolicy policy = descriptor.getObjectChangePolicy();
            // If it was a clone the change listener must be cleared after.
            if (!wasAClone) {
                // The change listener must be set before building the clone as aggregate/collections need the listener.
                policy.setChangeListener(workingClone, unitOfWork, descriptor);
            }
    
            // Turn it 'off' to prevent unwanted events.
            policy.dissableEventProcessing(workingClone);
            // Set fetch group before building object if a refresh to avoid fetching during building.
            if (isARefresh && this.descriptor.hasFetchGroupManager()) {
                this.descriptor.getFetchGroupManager().setObjectFetchGroup(workingClone, query.getFetchGroup(), unitOfWork);
            }
            // Build/refresh the clone from the row.
            buildAttributesIntoWorkingCopyClone(workingClone, query, joinManager, databaseRow, unitOfWork, wasAClone);
            // Set fetch group after building object if not a refresh to avoid checking fetch during building.           
            if ((!isARefresh) && this.descriptor.hasFetchGroupManager()) {
                this.descriptor.getFetchGroupManager().setObjectFetchGroup(workingClone, query.getFetchGroup(), unitOfWork);
            }
            Object backupClone = policy.buildBackupClone(workingClone, this, unitOfWork);
    
            // If it was a clone the change listener must be cleared.
            if (wasAClone) {
                policy.clearChanges(workingClone, unitOfWork, descriptor);
            }
            policy.enableEventProcessing(workingClone);
            unitOfWork.getCloneMapping().put(workingClone, backupClone);
            query.recordCloneForPessimisticLocking(workingClone, unitOfWork);
            // PERF: Cache the primary key if implements PersistenceEntity.
            if (workingClone instanceof PersistenceEntity) {
                ((PersistenceEntity)workingClone)._persistence_setPKVector(primaryKey);

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                return workingClone;
            }    
            workingClone = descriptor.getCopyPolicy().buildWorkingCopyCloneFromPrimaryKeyObject(primaryKeyObject, query, unitOfWork);
            unitOfWorkCacheKey.setObject(workingClone);                
            unitOfWork.getCloneMapping().put(workingClone, workingClone);    
            ObjectChangePolicy policy = descriptor.getObjectChangePolicy();
            policy.setChangeListener(workingClone, unitOfWork, descriptor);
            
            List mappings = descriptor.getMappings();
            int size = mappings.size();
            for (int index = 0; index < size; index++) {
                DatabaseMapping mapping = (DatabaseMapping) mappings.get(index);

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            if (wasAClone && (unitOfWorkCacheKey.getLastUpdatedQueryId() >= query.getQueryId())) {
                return workingClone;
            }
            copyQueryInfoToCacheKey(unitOfWorkCacheKey, query, databaseRow, unitOfWork, descriptor);
            
            ObjectChangePolicy policy = descriptor.getObjectChangePolicy();
            // If it was a clone the change listener must be cleared after.
            if (!wasAClone) {
                // The change listener must be set before building the clone as aggregate/collections need the listener.
                policy.setChangeListener(workingClone, unitOfWork, descriptor);
            }
    
            // Turn it 'off' to prevent unwanted events.
            policy.dissableEventProcessing(workingClone);
            // Set fetch group before building object if a refresh to avoid fetching during building.
            if (isARefresh && this.descriptor.hasFetchGroupManager()) {
                this.descriptor.getFetchGroupManager().setObjectFetchGroup(workingClone, query.getFetchGroup(), unitOfWork);
            }
            // Build/refresh the clone from the row.
            buildAttributesIntoWorkingCopyClone(workingClone, query, joinManager, databaseRow, unitOfWork, wasAClone);
            // Set fetch group after building object if not a refresh to avoid checking fetch during building.           
            if ((!isARefresh) && this.descriptor.hasFetchGroupManager()) {
                this.descriptor.getFetchGroupManager().setObjectFetchGroup(workingClone, query.getFetchGroup(), unitOfWork);
            }
            Object backupClone = policy.buildBackupClone(workingClone, this, unitOfWork);
    
            // If it was a clone the change listener must be cleared.
            if (wasAClone) {
                policy.clearChanges(workingClone, unitOfWork, descriptor);
            }
            policy.enableEventProcessing(workingClone);
            unitOfWork.getCloneMapping().put(workingClone, backupClone);
            query.recordCloneForPessimisticLocking(workingClone, unitOfWork);
            // PERF: Cache the primary key if implements PersistenceEntity.
            if (workingClone instanceof PersistenceEntity) {
                ((PersistenceEntity)workingClone)._persistence_setPKVector(primaryKey);

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                return workingClone;
            }    
            workingClone = descriptor.getCopyPolicy().buildWorkingCopyCloneFromPrimaryKeyObject(primaryKeyObject, query, unitOfWork);
            unitOfWorkCacheKey.setObject(workingClone);                
            unitOfWork.getCloneMapping().put(workingClone, workingClone);    
            ObjectChangePolicy policy = descriptor.getObjectChangePolicy();
            policy.setChangeListener(workingClone, unitOfWork, descriptor);
            
            List mappings = descriptor.getMappings();
            int size = mappings.size();
            for (int index = 0; index < size; index++) {
                DatabaseMapping mapping = (DatabaseMapping) mappings.get(index);

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        //Set ChangeListener for ObjectChangeTrackingPolicy and AttributeChangeTrackingPolicy,
        //but not DeferredChangeDetectionPolicy.  Build backup clone for DeferredChangeDetectionPolicy 
        //or ObjectChangeTrackingPolicy, but not for AttributeChangeTrackingPolicy.  
        // - Set listener before populating attributes so aggregates can find the parent's listener
        ObjectChangePolicy changePolicy = descriptor.getObjectChangePolicy();
        changePolicy.setChangeListener(workingClone, this, descriptor);
        changePolicy.dissableEventProcessing(workingClone);


        ObjectBuilder builder = descriptor.getObjectBuilder();
        builder.populateAttributesForClone(original, parentCacheKey, workingClone, this);
        Object backupClone = changePolicy.buildBackupClone(workingClone, builder, this);
        // PERF: Avoid put if no backup clone.
        if (workingClone != backupClone) {
            getCloneMapping().put(workingClone, backupClone);
        }
        changePolicy.enableEventProcessing(workingClone);
    }

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        //Set ChangeListener for ObjectChangeTrackingPolicy and AttributeChangeTrackingPolicy,
        //but not DeferredChangeDetectionPolicy.  Build backup clone for DeferredChangeDetectionPolicy 
        //or ObjectChangeTrackingPolicy, but not for AttributeChangeTrackingPolicy.  
        // - Set listener before populating attributes so aggregates can find the parent's listener
        ObjectChangePolicy changePolicy = descriptor.getObjectChangePolicy();
        changePolicy.setChangeListener(workingClone, this, descriptor);
        changePolicy.dissableEventProcessing(workingClone);


        ObjectBuilder builder = descriptor.getObjectBuilder();
        builder.populateAttributesForClone(original, parentCacheKey, workingClone, null, this);
        Object backupClone = changePolicy.buildBackupClone(workingClone, builder, this);
        // PERF: Avoid put if no backup clone.
        if (workingClone != backupClone) {
            getCloneMapping().put(workingClone, backupClone);
        }
        changePolicy.enableEventProcessing(workingClone);
    }

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        // Finally, update clone's fetch group reference.
        setObjectFetchGroup(workingClone, union, uow);
        if (workingClone != backupClone) {
            setObjectFetchGroup(backupClone, union, uow);
        }
        ObjectChangePolicy policy = descriptor.getObjectChangePolicy();
        // Turn it 'off' to prevent unwanted events.
        policy.dissableEventProcessing(workingClone);
        try {
            //if refresh is set, force to fill in fetch group data
            if (((FetchGroupTracker)partialObject)._persistence_shouldRefreshFetchGroup()) {
                //refresh and fill in the fetch group data
                refreshFetchGroupIntoClones(partialObject, workingClone, backupClone, fetchGroupInObject, fetchGroupInClone, uow);
            } else {//no refresh is enforced
                //revert the unfetched attributes of the clones.
                revertDataIntoUnfetchedAttributesOfClones(partialObject, workingClone, backupClone, fetchGroupInObject, fetchGroupInClone, uow);
            }
        } finally {
            policy.enableEventProcessing(workingClone);
        }
    }

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Related Classes of org.eclipse.persistence.descriptors.changetracking.ObjectChangePolicy

org.eclipse.persistence.descriptors.FetchGroupManager

org.eclipse.persistence.internal.descriptors.ObjectBuilder

org.eclipse.persistence.internal.jpa.metadata.changetracking.ChangeTrackingMetadata

org.eclipse.persistence.internal.sessions.UnitOfWorkImpl

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