Examples of org.eclipse.persistence.internal.descriptors.ObjectBuilder.mergeChangesIntoObject()

Package org.eclipse.persistence.internal.descriptors

Class org.eclipse.persistence.internal.descriptors.ObjectBuilder

Examples of org.eclipse.persistence.internal.descriptors.ObjectBuilder.mergeChangesIntoObject()

org.eclipse.persistence.internal.descriptors.ObjectBuilder.mergeChangesIntoObject()
INTERNAL: Merge changes between the objects, this merge algorithm is dependent on the merge manager.

                    // there will be no deadlock situation because no other threads
                    // will be able to reference this object.
                    original = parent.getIdentityMapAccessorInstance().getWriteLockManager().appendLock(objectChangeSet.getPrimaryKeys(), original, descriptor, this, parent);
                    objectBuilder.mergeIntoObject(original, true, clone, this, false, !descriptor.getCopyPolicy().buildsNewInstance());
                } else {
                    objectBuilder.mergeChangesIntoObject(original, objectChangeSet, clone, this, !descriptor.getCopyPolicy().buildsNewInstance());
                    // PERF: If PersistenceEntity is caching the primary key this must be cleared as the primary key may have changed in new objects.
                    objectBuilder.clearPrimaryKey(original);
                }
                updateCacheKeyProperties(unitOfWork, original, clone, objectChangeSet, descriptor);
            } else if (objectChangeSet == null) {

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                // collection objects, object read in a transaction) then no object would be in the shared cache and foreign reference 
                // mappings would be set to null when they should be set to an object.
                if (objectChangeSet.hasChanges()){
                    //if there are no changes then we just need a reference to the object so skip the merge
                    // saves trying to lock related objects after the fact producing deadlocks
                    objectBuilder.mergeChangesIntoObject(original, objectChangeSet, clone, this, false);
                    updateCacheKeyProperties(unitOfWork, original, clone, objectChangeSet, descriptor);
                }
            }
        } catch (QueryException exception) {
            // Ignore validation errors if unit of work validation is suppressed.

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                    // there will be no deadlock situation because no other threads
                    // will be able to reference this object.
                    original = parent.getIdentityMapAccessorInstance().getWriteLockManager().appendLock(objectChangeSet.getPrimaryKeys(), original, descriptor, this, parent);
                    objectBuilder.mergeIntoObject(original, true, clone, this);
                } else {
                    objectBuilder.mergeChangesIntoObject(original, objectChangeSet, clone, this);
                    // PERF: If PersistenceEntity is caching the primary key this must be cleared as the primary key may have changed in new objects.
                    objectBuilder.clearPrimaryKey(original);
                }
            } else if (objectChangeSet == null) {
                // If we have no change set then we must merge the entire object.

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                // Regardless if the object is new, old, valid or invalid, merging will ensure there is a stub of an object in the 
                // shared cache for filling in foreign reference relationships. If merge did not occur in some cases (new  objects, garbage 
                // collection objects, object read in a transaction) then no object would be in the shared cache and foreign reference 
                // mappings would be set to null when they should be set to an object.
                objectBuilder.mergeChangesIntoObject(original, objectChangeSet, clone, this);
            }
        } catch (QueryException exception) {
            // Ignore validation errors if unit of work validation is suppressed.
            // Also there is a very specific case under EJB wrappering where
            // a related object may have never been accessed in the unit of work context

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