How to use

buildClone

method

in

org.eclipse.persistence.descriptors.copying.CopyPolicy

/**
 * Returns the clone of the specified object. This is called only from unit of work.
 * This only instantiates the clone instance, it does not clone the attributes,
 * this allows the stub of the clone to be registered before cloning its parts.
 */
public Object instantiateClone(Object domainObject, AbstractSession session) {
  Object clone = this.descriptor.getCopyPolicy().buildClone(domainObject, session);
  // Clear change tracker.
  if (clone instanceof ChangeTracker) {
    ((ChangeTracker)clone)._persistence_setPropertyChangeListener(null);
  }
  return clone;
}

/**
 * Returns the clone of the specified object. This is called only from unit of work.
 * This only instantiates the clone instance, it does not clone the attributes,
 * this allows the stub of the clone to be registered before cloning its parts.
 */
public Object instantiateClone(Object domainObject, AbstractSession session) {
  Object clone = this.descriptor.getCopyPolicy().buildClone(domainObject, session);
  // Clear change tracker.
  if (clone instanceof ChangeTracker) {
    ((ChangeTracker)clone)._persistence_setPropertyChangeListener(null);
  }
  if(clone instanceof FetchGroupTracker) {
    ((FetchGroupTracker)clone)._persistence_setFetchGroup(null);
    ((FetchGroupTracker)clone)._persistence_setSession(null);
  }
  clearPrimaryKey(clone);
  return clone;
}

/**
 * Returns the clone of the specified object. This is called only from unit of work.
 * This only instantiates the clone instance, it does not clone the attributes,
 * this allows the stub of the clone to be registered before cloning its parts.
 */
public Object instantiateClone(Object domainObject, AbstractSession session) {
  Object clone = this.descriptor.getCopyPolicy().buildClone(domainObject, session);
  // Clear change tracker.
  if (clone instanceof ChangeTracker) {
    ((ChangeTracker)clone)._persistence_setPropertyChangeListener(null);
  }
  if(clone instanceof FetchGroupTracker) {
    ((FetchGroupTracker)clone)._persistence_setFetchGroup(null);
    ((FetchGroupTracker)clone)._persistence_setSession(null);
  }
  clearPrimaryKey(clone);
  return clone;
}

/**
 * Returns the backup clone of the specified object. This is called only from unit of work.
 * The clone sent as parameter is always a working copy from the unit of work.
 */
public Object buildBackupClone(Object clone, UnitOfWorkImpl unitOfWork) {
  // The copy policy builds clone    .
  ClassDescriptor descriptor = this.descriptor;
  Object backup = descriptor.getCopyPolicy().buildClone(clone, unitOfWork);
  // PERF: Avoid synchronized enumerator as is concurrency bottleneck.
  List mappings = getCloningMappings();
  int size = mappings.size();
  if (descriptor.hasFetchGroupManager() && descriptor.getFetchGroupManager().isPartialObject(clone)) {
    FetchGroupManager fetchGroupManager = descriptor.getFetchGroupManager();
    for (int index = 0; index < size; index++) {
      DatabaseMapping mapping = (DatabaseMapping)mappings.get(index);
      if (fetchGroupManager.isAttributeFetched(clone, mapping.getAttributeName())) {
        mapping.buildBackupClone(clone, backup, unitOfWork);
      }
    }
  } else {
    for (int index = 0; index < size; index++) {
      ((DatabaseMapping)mappings.get(index)).buildBackupClone(clone, backup, unitOfWork);
    }
  }
  return backup;
}

/**
 * Returns the backup clone of the specified object. This is called only from unit of work.
 * The clone sent as parameter is always a working copy from the unit of work.
 */
public Object buildBackupClone(Object clone, UnitOfWorkImpl unitOfWork) {
  // The copy policy builds clone	.
  ClassDescriptor descriptor = this.descriptor;
  Object backup = descriptor.getCopyPolicy().buildClone(clone, unitOfWork);
  // PERF: Avoid synchronized enumerator as is concurrency bottleneck.
  List mappings = getCloningMappings();
  int size = mappings.size();
  if (descriptor.hasFetchGroupManager() && descriptor.getFetchGroupManager().isPartialObject(clone)) {
    FetchGroupManager fetchGroupManager = descriptor.getFetchGroupManager();
    for (int index = 0; index < size; index++) {
      DatabaseMapping mapping = (DatabaseMapping)mappings.get(index);
      if (fetchGroupManager.isAttributeFetched(clone, mapping.getAttributeName())) {
        mapping.buildBackupClone(clone, backup, unitOfWork);
      }
    }
  } else {
    for (int index = 0; index < size; index++) {
      ((DatabaseMapping)mappings.get(index)).buildBackupClone(clone, backup, unitOfWork);
    }
  }
  return backup;
}

/**
 * Returns the backup clone of the specified object. This is called only from unit of work.
 * The clone sent as parameter is always a working copy from the unit of work.
 */
public Object buildBackupClone(Object clone, UnitOfWorkImpl unitOfWork) {
  // The copy policy builds clone	.
  ClassDescriptor descriptor = this.descriptor;
  Object backup = descriptor.getCopyPolicy().buildClone(clone, unitOfWork);
  // PERF: Avoid synchronized enumerator as is concurrency bottleneck.
  List mappings = getCloningMappings();
  int size = mappings.size();
  if (descriptor.hasFetchGroupManager() && descriptor.getFetchGroupManager().isPartialObject(clone)) {
    FetchGroupManager fetchGroupManager = descriptor.getFetchGroupManager();
    for (int index = 0; index < size; index++) {
      DatabaseMapping mapping = (DatabaseMapping)mappings.get(index);
      if (fetchGroupManager.isAttributeFetched(clone, mapping.getAttributeName())) {
        mapping.buildBackupClone(clone, backup, unitOfWork);
      }
    }
  } else {
    for (int index = 0; index < size; index++) {
      ((DatabaseMapping)mappings.get(index)).buildBackupClone(clone, backup, unitOfWork);
    }
  }
  return backup;
}