Examples of org.eclipse.persistence.descriptors.DescriptorEvent

Package org.eclipse.persistence.descriptors

Examples of org.eclipse.persistence.descriptors.DescriptorEvent

org.eclipse.persistence.descriptors.DescriptorEvent

Purpose: Encapsulate the information provided with descriptor events. This is used as the argument to any event raised by the descriptor. Events can be registered for through two methods, the first is by providing a method to be called on the object that a particular operation is being performed on. The second is by registering a manager object to be notified when any event occurs for that descriptor. The second method is more similar to the java beans event model but requires the registered object to implement the DescriptorEventListener interface. @see DescriptorEventManager @see DescriptorEventListener

    
                // Need to run pre-delete selector if available.
                // PERF: Avoid events if no listeners.
                if (this.descriptor.getEventManager().hasAnyEventListeners()) {
                    for (Object object : this.objects) {
                        DescriptorEvent event = new DescriptorEvent(object);
                        event.setEventCode(DescriptorEventManager.PreDeleteEvent);
                        event.setSession(this.session);
                        event.setQuery(this);
                        this.descriptor.getEventManager().executeEvent(event);
                    }
                }


                if (this.isInMemoryOnly) {
                    result = Integer.valueOf(0);
                } else {
                    result = this.queryMechanism.deleteAll();
                }
    
                // Need to run post-delete selector if available.
                // PERF: Avoid events if no listeners.
                if (this.descriptor.getEventManager().hasAnyEventListeners()) {
                    for (Object object : this.objects) {
                        DescriptorEvent event = new DescriptorEvent(object);
                        event.setEventCode(DescriptorEventManager.PostDeleteEvent);
                        event.setSession(this.session);
                        event.setQuery(this);
                        this.descriptor.getEventManager().executeEvent(event);
                    }
                }
    
                if (shouldMaintainCache()) {

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            writeQuery.setObject(clone);
            writeQuery.setBackupClone(backUp);
            writeQuery.setSession(unitOfWork);
            writeQuery.setDescriptor(descriptor);


            descriptor.getEventManager().executeEvent(new DescriptorEvent(DescriptorEventManager.PreWriteEvent, writeQuery));


            if (isNew) {
                descriptor.getEventManager().executeEvent(new DescriptorEvent(DescriptorEventManager.PreInsertEvent, writeQuery));
            } else {
                descriptor.getEventManager().executeEvent(new DescriptorEvent(DescriptorEventManager.PreUpdateEvent, writeQuery));
            }
        }
        
        ObjectChangeSet changes = createObjectChangeSet(clone, backUp, changeSet, isNew, unitOfWork, descriptor);
        if(changes.hasChanges() && descriptor.hasMappingsPostCalculateChanges() && ! changes.isNew() && ! unitOfWork.getCommitManager().isActive() && !unitOfWork.isNestedUnitOfWork()) {

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        // PERF: Avoid events if no listeners.
        if (this.descriptor.getEventManager().hasAnyEventListeners()) {
            // Need to run post build or refresh selector, currently check with the query for this,
            // I'm not sure which should be called it case of refresh building a new object, currently refresh is used...
            DescriptorEvent event = new DescriptorEvent(clone);
            event.setQuery(query);
            event.setSession(unitOfWork);
            event.setDescriptor(this.descriptor);
            event.setRecord(databaseRow);
            if (forRefresh) {
                event.setEventCode(DescriptorEventManager.PostRefreshEvent);
            } else {
                event.setEventCode(DescriptorEventManager.PostBuildEvent);
                //fire a postBuildEvent then the postCloneEvent
                unitOfWork.deferEvent(event);
               
                event = new DescriptorEvent(clone);
                event.setQuery(query);
                event.setSession(unitOfWork);
                event.setDescriptor(this.descriptor);
                event.setRecord(databaseRow);
                //bug 259404: ensure postClone is called for objects built directly into the UnitOfWork
                //in this case, the original is the clone
                event.setOriginalObject(clone);
                event.setEventCode(DescriptorEventManager.PostCloneEvent);
            }
            unitOfWork.deferEvent(event);
            
            
        }

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                mapping.mergeChangesIntoObject(target, record, source, mergeManager, targetSession);                
            }
            // PERF: Avoid events if no listeners.
            // Event is already raised in mergeIntoObject, avoid calling twice.
            if (this.descriptor.getEventManager().hasAnyEventListeners()) {
                DescriptorEvent event = new DescriptorEvent(target);
                event.setSession(mergeManager.getSession());
                event.setOriginalObject(source);
                event.setChangeSet(changeSet);
                event.setEventCode(DescriptorEventManager.PostMergeEvent);
                this.descriptor.getEventManager().executeEvent(event);
            }
        }
        this.descriptor.getCachePolicy().indexObjectInCache(changeSet, target, this.descriptor, targetSession);
    }

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            }
        }


        // PERF: Avoid events if no listeners.
        if (this.descriptor.getEventManager().hasAnyEventListeners()) {
            DescriptorEvent event = new DescriptorEvent(target);
            event.setSession(mergeManager.getSession());
            event.setOriginalObject(source);
            event.setChangeSet(changeSet);
            event.setEventCode(DescriptorEventManager.PostMergeEvent);
            this.descriptor.getEventManager().executeEvent(event);
        }
    }

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            }
        }


        // PERF: Avoid events if no listeners.
        if (this.descriptor.getEventManager().hasAnyEventListeners()) {
            DescriptorEvent event = new DescriptorEvent(clone);
            event.setSession((AbstractSession) cloningSession);
            event.setOriginalObject(original);
            event.setDescriptor(descriptor);
            event.setEventCode(DescriptorEventManager.PostCloneEvent);
            cloningSession.deferEvent(event);
        }
    }

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            }
        }


        // PERF: Avoid events if no listeners.
        if (this.descriptor.getEventManager().hasAnyEventListeners()) {
            DescriptorEvent event = new DescriptorEvent(clone);
            event.setSession(cloningSession);
            event.setOriginalObject(original);
            event.setDescriptor(descriptor);
            event.setEventCode(DescriptorEventManager.PostCloneEvent);
            cloningSession.deferEvent(event);
        }
    }

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        if (!this.isExecutingEvents && this.deferredEvents != null) {
            this.isExecutingEvents = true;
            try {
                for (int i = 0; i < this.deferredEvents.size(); ++i) { 
                    // the size is checked every time here because the list may grow
                    DescriptorEvent event = this.deferredEvents.get(i);
                    event.getDescriptor().getEventManager().executeEvent(event);
                }
                this.deferredEvents.clear();
            } finally {
                this.isExecutingEvents = false;
            }

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    protected void executeEvent(int eventCode, ObjectLevelModifyQuery query) {
        ClassDescriptor referenceDescriptor = getReferenceDescriptor(query.getObject().getClass(), query.getSession());


        // PERF: Avoid events if no listeners.
        if (referenceDescriptor.getEventManager().hasAnyEventListeners()) {
            referenceDescriptor.getEventManager().executeEvent(new DescriptorEvent(eventCode, query));
        }
    }

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        // PERF: Avoid events if no listeners.
        if (this.descriptor.getEventManager().hasAnyEventListeners()) {
            // Need to run post build or refresh selector, currently check with the query for this,
            // I'm not sure which should be called it case of refresh building a new object, currently refresh is used...
            DescriptorEvent event = new DescriptorEvent(clone);
            event.setQuery(query);
            event.setSession(unitOfWork);
            event.setDescriptor(this.descriptor);
            event.setRecord(databaseRow);
            if (forRefresh) {
                event.setEventCode(DescriptorEventManager.PostRefreshEvent);
            } else {
                event.setEventCode(DescriptorEventManager.PostBuildEvent);
                //fire a postBuildEvent then the postCloneEvent
                unitOfWork.deferEvent(event);
               
                event = new DescriptorEvent(clone);
                event.setQuery(query);
                event.setSession(unitOfWork);
                event.setDescriptor(this.descriptor);
                event.setRecord(databaseRow);
                //bug 259404: ensure postClone is called for objects built directly into the UnitOfWork
                //in this case, the original is the clone
                event.setOriginalObject(clone);
                event.setEventCode(DescriptorEventManager.PostCloneEvent);
            }
            unitOfWork.deferEvent(event);
            
            
        }

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Related Classes of org.eclipse.persistence.descriptors.DescriptorEvent

org.eclipse.persistence.descriptors.changetracking.DeferredChangeDetectionPolicy

org.eclipse.persistence.internal.descriptors.ObjectBuilder

org.eclipse.persistence.internal.oxm.record.UnmarshalRecordImpl

org.eclipse.persistence.internal.queries.DatabaseQueryMechanism

org.eclipse.persistence.internal.sessions.AbstractSession

org.eclipse.persistence.mappings.AggregateCollectionMapping

org.eclipse.persistence.mappings.DatabaseMapping

org.eclipse.persistence.oxm.record.UnmarshalRecord

org.eclipse.persistence.queries.DeleteAllQuery

org.eclipse.persistence.queries.DeleteObjectQuery

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