org.eclipse.persistence.internal.descriptors.changetracking.AggregateAttributeChangeListener java code examples

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/**
 * INTERNAL:
 * Assign ChangeListener to an aggregate object
 */
public void setAggregateChangeListener(Object parent, Object aggregate, UnitOfWorkImpl uow, ClassDescriptor descriptor, String mappingAttribute){
  ((ChangeTracker)aggregate)._persistence_setPropertyChangeListener(new AggregateAttributeChangeListener(descriptor, uow, (AttributeChangeListener)((ChangeTracker)parent)._persistence_getPropertyChangeListener(), mappingAttribute, aggregate)); 
}

  if (referenceDescriptor.getObjectChangePolicy().isAttributeChangeTrackingPolicy()){
    ((AggregateAttributeChangeListener)((ChangeTracker)oldValue)._persistence_getPropertyChangeListener()).setParentListener(null);
    if(oldValue != null) {
      ((AggregateAttributeChangeListener)((ChangeTracker)oldValue)._persistence_getPropertyChangeListener()).setParentListener(null);
      newListener = new AggregateAttributeChangeListener(referenceDescriptor, uow, ((AttributeChangeListener)((ChangeTracker)sourceClone)._persistence_getPropertyChangeListener()), this.getAttributeName(), newValue);
      ((ChangeTracker)newValue)._persistence_setPropertyChangeListener(newListener);
    newListener.setParentListener((AttributeChangeListener)((ChangeTracker)sourceClone)._persistence_getPropertyChangeListener());
  changeRecord.setChangedObject(((AggregateAttributeChangeListener)((ChangeTracker)sourceClone)._persistence_getPropertyChangeListener()).getObjectChangeSet());
} else {

    if(((ChangeTracker)oldValue)._persistence_getPropertyChangeListener() != null) {
      ((AggregateAttributeChangeListener)((ChangeTracker)oldValue)._persistence_getPropertyChangeListener()).setParentListener(null);
    if(oldValue != null && ((ChangeTracker)oldValue)._persistence_getPropertyChangeListener() != null) {
      ((AggregateAttributeChangeListener)((ChangeTracker)oldValue)._persistence_getPropertyChangeListener()).setParentListener(null);
      newListener = new AggregateAttributeChangeListener(referenceDescriptor, uow, ((AttributeChangeListener)((ChangeTracker)sourceClone)._persistence_getPropertyChangeListener()), this.getAttributeName(), newValue);
      ((ChangeTracker)newValue)._persistence_setPropertyChangeListener(newListener);
    newListener.setParentListener((AttributeChangeListener)((ChangeTracker)sourceClone)._persistence_getPropertyChangeListener());
    if (changeRecord.getChangedObject() != null && changeRecord.getChangedObject().hasChanges()) {
  changeRecord.setChangedObject(((AggregateAttributeChangeListener)((ChangeTracker)sourceClone)._persistence_getPropertyChangeListener()).getObjectChangeSet());
} else {

    if(((ChangeTracker)oldValue)._persistence_getPropertyChangeListener() != null) {
      ((AggregateAttributeChangeListener)((ChangeTracker)oldValue)._persistence_getPropertyChangeListener()).setParentListener(null);
    if(oldValue != null && ((ChangeTracker)oldValue)._persistence_getPropertyChangeListener() != null) {
      ((AggregateAttributeChangeListener)((ChangeTracker)oldValue)._persistence_getPropertyChangeListener()).setParentListener(null);
      newListener = new AggregateAttributeChangeListener(referenceDescriptor, uow, ((AttributeChangeListener)((ChangeTracker)sourceClone)._persistence_getPropertyChangeListener()), this.getAttributeName(), newValue);
      ((ChangeTracker)newValue)._persistence_setPropertyChangeListener(newListener);
    newListener.setParentListener((AttributeChangeListener)((ChangeTracker)sourceClone)._persistence_getPropertyChangeListener());
    if (changeRecord.getChangedObject() != null && changeRecord.getChangedObject().hasChanges()) {
  changeRecord.setChangedObject(((AggregateAttributeChangeListener)((ChangeTracker)sourceClone)._persistence_getPropertyChangeListener()).getObjectChangeSet());
} else {

/**
 * INTERNAL:
 * Assign ChangeListener to an aggregate object
 */
public void setAggregateChangeListener(Object parent, Object aggregate, UnitOfWorkImpl uow, ClassDescriptor descriptor, String mappingAttribute){
  ((ChangeTracker)aggregate)._persistence_setPropertyChangeListener(new AggregateAttributeChangeListener(descriptor, uow, (AttributeChangeListener)((ChangeTracker)parent)._persistence_getPropertyChangeListener(), mappingAttribute, aggregate));
  // set change trackers for nested aggregates
  Iterator<DatabaseMapping> i = descriptor.getMappings().iterator();
  while (i.hasNext()){
    DatabaseMapping mapping = i.next();
    if (mapping.isAggregateObjectMapping()){
      AggregateObjectMapping aggregateMapping = (AggregateObjectMapping)mapping;
      Object nestedAggregate = aggregateMapping.getAttributeValueFromObject(aggregate);
      if (nestedAggregate != null && nestedAggregate instanceof ChangeTracker){
        descriptor.getObjectChangePolicy().setAggregateChangeListener(aggregate, nestedAggregate, uow, aggregateMapping.getReferenceDescriptor(), aggregateMapping.getAttributeName());
      }
    }
  }
}

/**
 * INTERNAL:
 * Assign ChangeListener to an aggregate object
 */
public void setAggregateChangeListener(Object parent, Object aggregate, UnitOfWorkImpl uow, ClassDescriptor descriptor, String mappingAttribute){
  ((ChangeTracker)aggregate)._persistence_setPropertyChangeListener(new AggregateAttributeChangeListener(descriptor, uow, (AttributeChangeListener)((ChangeTracker)parent)._persistence_getPropertyChangeListener(), mappingAttribute, aggregate)); 
  
  // set change trackers for nested aggregates
  Iterator<DatabaseMapping> i = descriptor.getMappings().iterator();
  while (i.hasNext()){
    DatabaseMapping mapping = i.next();
    if (mapping.isAggregateObjectMapping()){
      AggregateObjectMapping aggregateMapping = (AggregateObjectMapping)mapping;
      Object nestedAggregate = aggregateMapping.getAttributeValueFromObject(aggregate);
      if (nestedAggregate != null && nestedAggregate instanceof ChangeTracker){
        descriptor.getObjectChangePolicy().setAggregateChangeListener(aggregate, nestedAggregate, uow, aggregateMapping.getReferenceDescriptor(), aggregateMapping.getAttributeName());
      }
    }
  }
}

Javadoc

Purpose: Define a listener for attribute change tracking.

Description: Listener is notified on a PropertyChangeEvent from the object it belongs to.

Responsibilities: Set the flag to true and build ObjectChangeSet that includes the ChangeRecords for the changed attributes.

Most used methods

<init>
Create a AttributeChangeListener with a descriptor and unit of work
getObjectChangeSet
setParentListener
Used to control the parent listener;

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How to useAggregateAttributeChangeListener in org.eclipse.persistence.internal.descriptors.changetracking

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AggregateAttributeChangeListener
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