How to use

addChildDescriptor

method

in

org.eclipse.persistence.descriptors.InterfacePolicy

/**
 * INTERNAL:
 * Allow the descriptor to initialize any dependencies on this session.
 */
public void preInterfaceInitialization(AbstractSession session) throws DescriptorException {
  if (isInterfaceInitialized(PREINITIALIZED)) {
    return;
  }
  setInterfaceInitializationStage(PREINITIALIZED);
  assignDefaultValues(session);
  if (isInterfaceChildDescriptor()) {
    for (Iterator<Class> interfaces = getInterfacePolicy().getParentInterfaces().iterator();
         interfaces.hasNext();) {
      Class parentInterface = interfaces.next();
      ClassDescriptor parentDescriptor = session.getDescriptor(parentInterface);
      if ((parentDescriptor == null) || (parentDescriptor.getJavaClass() == getJavaClass()) || parentDescriptor.getInterfacePolicy().usesImplementorDescriptor()) {
        session.getProject().getDescriptors().put(parentInterface, this);
        session.clearLastDescriptorAccessed();
      } else if (!parentDescriptor.isDescriptorForInterface()) {
        throw DescriptorException.descriptorForInterfaceIsMissing(parentInterface.getName());
      } else {
        parentDescriptor.preInterfaceInitialization(session);
        parentDescriptor.getInterfacePolicy().addChildDescriptor(this);
        getInterfacePolicy().addParentDescriptor(parentDescriptor);
      }
    }
  }
}

/**
 * INTERNAL:
 * Allow the descriptor to initialize any dependencies on this session.
 */
public void preInterfaceInitialization(AbstractSession session) throws DescriptorException {
  if (isInterfaceInitialized(PREINITIALIZED)) {
    return;
  }
  setInterfaceInitializationStage(PREINITIALIZED);
  assignDefaultValues(session);
  
  if (isInterfaceChildDescriptor()) {
    for (Enumeration interfaces = getInterfacePolicy().getParentInterfaces().elements();
         interfaces.hasMoreElements();) {
      Class parentInterface = (Class)interfaces.nextElement();
      ClassDescriptor parentDescriptor = session.getDescriptor(parentInterface);
      if ((parentDescriptor == null) || (parentDescriptor.getJavaClass() == getJavaClass()) || parentDescriptor.getInterfacePolicy().usesImplementorDescriptor()) {
        session.getProject().getDescriptors().put(parentInterface, this);
        session.clearLastDescriptorAccessed();
      } else if (!parentDescriptor.isDescriptorForInterface()) {
        throw DescriptorException.descriptorForInterfaceIsMissing(parentInterface.getName());
      } else {
        parentDescriptor.preInterfaceInitialization(session);
        parentDescriptor.getInterfacePolicy().addChildDescriptor(this);
        getInterfacePolicy().addParentDescriptor(parentDescriptor);
      }
    }
  }
}

/**
 * INTERNAL:
 * Allow the descriptor to initialize any dependencies on this session.
 */
public void preInterfaceInitialization(AbstractSession session) throws DescriptorException {
  if (isInterfaceInitialized(PREINITIALIZED)) {
    return;
  }
  setInterfaceInitializationStage(PREINITIALIZED);
  assignDefaultValues(session);
  
  if (isInterfaceChildDescriptor()) {
    for (Iterator<Class> interfaces = getInterfacePolicy().getParentInterfaces().iterator();
         interfaces.hasNext();) {
      Class parentInterface = interfaces.next();
      ClassDescriptor parentDescriptor = session.getDescriptor(parentInterface);
      if ((parentDescriptor == null) || (parentDescriptor.getJavaClass() == getJavaClass()) || parentDescriptor.getInterfacePolicy().usesImplementorDescriptor()) {
        session.getProject().getDescriptors().put(parentInterface, this);
        session.clearLastDescriptorAccessed();
      } else if (!parentDescriptor.isDescriptorForInterface()) {
        throw DescriptorException.descriptorForInterfaceIsMissing(parentInterface.getName());
      } else {
        parentDescriptor.preInterfaceInitialization(session);
        parentDescriptor.getInterfacePolicy().addChildDescriptor(this);
        getInterfacePolicy().addParentDescriptor(parentDescriptor);
      }
    }
  }
}