How to use

getSession

method

in

org.eclipse.persistence.internal.descriptors.DescriptorIterator

/**
 * Fetch and return the descriptor for the specified object.
 */
protected ClassDescriptor getDescriptorFor(Object object) {
  ClassDescriptor result = getSession().getDescriptor(object);
  if (result == null) {
    throw DescriptorException.missingDescriptor(object.getClass().getName());
  }
  return result;
}

/**
 * Fetch and return the descriptor for the specified object.
 */
protected ClassDescriptor getDescriptorFor(Object object) {
  ClassDescriptor result = getSession().getDescriptor(object);
  if (result == null) {
    throw DescriptorException.missingDescriptor(object.getClass().getName());
  }
  return result;
}

/**
 * Fetch and return the descriptor for the specified object.
 */
protected ClassDescriptor getDescriptorFor(Object object) {
  ClassDescriptor result = getSession().getDescriptor(object);
  if (result == null) {
    throw DescriptorException.missingDescriptor(object.getClass().getName());
  }
  return result;
}

/**
 * INTERNAL:
 * Iterate on the specified element.
 */
@Override
public void iterateOnElement(DescriptorIterator iterator, Object element) {
  // CR#... Aggregate collections must iterate as aggregates, not regular mappings.
  // For some reason the element can be null, this makes absolutely no sense, but we have a test case for it...
  if (element != null) {
    iterator.iterateForAggregateMapping(element, this, getReferenceDescriptor(element.getClass(), iterator.getSession()));
  }
}

/**
 * INTERNAL:
 * Iterate on the specified element.
 */
public void iterateOnElement(DescriptorIterator iterator, Object element) {
  // CR#... Aggregate collections must iterate as aggregates, not regular mappings.
  // For some reason the element can be null, this makes absolutely no sense, but we have a test case for it...
  if (element != null) {
    iterator.iterateForAggregateMapping(element, this, getReferenceDescriptor(element.getClass(), iterator.getSession()));
  }
}

/**
 * INTERNAL:
 * Iterate on the specified element.
 */
@Override
public void iterateOnElement(DescriptorIterator iterator, Object element) {
  // CR#... Aggregate collections must iterate as aggregates, not regular mappings.
  // For some reason the element can be null, this makes absolutely no sense, but we have a test case for it...
  if (element != null) {
    iterator.iterateForAggregateMapping(element, this, getReferenceDescriptor(element.getClass(), iterator.getSession()));
  }
}

/**
 * Iterate on the specified attribute value.
 */
protected void iterateOnAttributeValue(DescriptorIterator iterator, Object attributeValue) {
  iterator.iterateForAggregateMapping(attributeValue, this, getReferenceDescriptor(attributeValue, iterator.getSession()));
}

/**
 * Iterate on the specified attribute value.
 */
protected void iterateOnAttributeValue(DescriptorIterator iterator, Object attributeValue) {
  iterator.iterateForAggregateMapping(attributeValue, this, getReferenceDescriptor(attributeValue, iterator.getSession()));
}

/**
 * Iterate on the specified attribute value.
 */
protected void iterateOnAttributeValue(DescriptorIterator iterator, Object attributeValue) {
  iterator.iterateForAggregateMapping(attributeValue, this, getReferenceDescriptor(attributeValue, iterator.getSession()));
}
 

/**
 * INTERNAL:
 * Iterate on the attribute value.
 * The value holder has already been processed.
 */
@Override
public void iterateOnRealAttributeValue(DescriptorIterator iterator, Object realAttributeValue) {
  // This may be wrapped as the caller in iterate on foreign reference does not unwrap as the type is generic.
  Object unwrappedAttributeValue = getReferenceDescriptor().getObjectBuilder().unwrapObject(realAttributeValue, iterator.getSession());
  iterator.iterateReferenceObjectForMapping(unwrappedAttributeValue, this);
}

/**
 * INTERNAL:
 * Iterate on the attribute value.
 * The value holder has already been processed.
 */
@Override
public void iterateOnRealAttributeValue(DescriptorIterator iterator, Object realAttributeValue) {
  // This may be wrapped as the caller in iterate on foreign reference does not unwrap as the type is generic.
  Object unwrappedAttributeValue = getReferenceDescriptor().getObjectBuilder().unwrapObject(realAttributeValue, iterator.getSession());
  iterator.iterateReferenceObjectForMapping(unwrappedAttributeValue, this);
}

/**
 * INTERNAL:
 * Iterate on the attribute value.
 * The value holder has already been processed.
 */
public void iterateOnRealAttributeValue(DescriptorIterator iterator, Object realAttributeValue) {
  // This may be wrapped as the caller in iterate on foreign reference does not unwrap as the type is generic.
  Object unwrappedAttributeValue = getReferenceDescriptor().getObjectBuilder().unwrapObject(realAttributeValue, iterator.getSession());
  iterator.iterateReferenceObjectForMapping(unwrappedAttributeValue, this);
}

/**
 * Iterate on the specified attribute value.
 */
protected void iterateOnAttributeValue(DescriptorIterator descriptorIterator, Object attributeValue) {
  if (attributeValue == null) {
    return;
  }
  ContainerPolicy cp = this.getContainerPolicy();
  for (Object iter = cp.iteratorFor(attributeValue); cp.hasNext(iter);) {
    super.iterateOnAttributeValue(descriptorIterator, cp.next(iter, descriptorIterator.getSession()));
  }
}

/**
 * Iterate on the specified attribute value.
 */
@Override
protected void iterateOnAttributeValue(DescriptorIterator descriptorIterator, Object attributeValue) {
  if (attributeValue == null) {
    return;
  }
  ContainerPolicy cp = this.getContainerPolicy();
  for (Object iter = cp.iteratorFor(attributeValue); cp.hasNext(iter);) {
    super.iterateOnAttributeValue(descriptorIterator, cp.next(iter, descriptorIterator.getSession()));
  }
}

/**
 * Iterate on the specified attribute value.
 */
@Override
protected void iterateOnAttributeValue(DescriptorIterator descriptorIterator, Object attributeValue) {
  if (attributeValue == null) {
    return;
  }
  ContainerPolicy cp = this.getContainerPolicy();
  for (Object iter = cp.iteratorFor(attributeValue); cp.hasNext(iter);) {
    super.iterateOnAttributeValue(descriptorIterator, cp.next(iter, descriptorIterator.getSession()));
  }
}

/**
 * INTERNAL:
 * Iterate on the specified element.
 */
@Override
public void iterateOnElement(DescriptorIterator iterator, Object element) {
  super.iterateOnElement(iterator, element);
  ContainerPolicy cp = getContainerPolicy();
  for (Object iter = cp.iteratorFor(element); cp.hasNext(iter);) {
    Object wrappedObject = cp.nextEntry(iter, iterator.getSession());
    cp.iterateOnMapKey(iterator, wrappedObject);
  }
}

/**
 * INTERNAL:
 * Iterate on the specified element.
 */
@Override
public void iterateOnElement(DescriptorIterator iterator, Object element) {
  super.iterateOnElement(iterator, element);
  ContainerPolicy cp = getContainerPolicy();
  for (Object iter = cp.iteratorFor(element); cp.hasNext(iter);) {
    Object wrappedObject = cp.nextEntry(iter, iterator.getSession());
    cp.iterateOnMapKey(iterator, wrappedObject);
  }
}

/**
 * This is the root method called to start the iteration.
 */
public void startIterationOn(Object sourceObject) {
  if (getVisitedObjects().containsKey(sourceObject)) {
    return;
  }
  getVisitedObjects().put(sourceObject, sourceObject);
  setCurrentMapping(null);
  setCurrentDescriptor(getSession().getDescriptor(sourceObject));
  iterate(sourceObject);
  // start the recursion
  if ((getCurrentDescriptor() != null) && (!shouldCascadeNoParts())  && !this.shouldBreak()) {
    iterateReferenceObjects(sourceObject);
  }
}
 

/**
 * INTERNAL:
 * Iterate on the specified element.
 */
public void iterateOnElement(DescriptorIterator iterator, Object element) {
  super.iterateOnElement(iterator, element);
  ContainerPolicy cp = getContainerPolicy();
  for (Object iter = cp.iteratorFor(element); cp.hasNext(iter);) {
    Object wrappedObject = cp.nextEntry(iter, iterator.getSession());
    Object object = cp.unwrapIteratorResult(wrappedObject);
    cp.iterateOnMapKey(iterator, wrappedObject);
  }
}

/**
 * INTERNAL:
 * Iterate on the attribute value.
 * The value holder has already been processed.
 * PERF: Avoid iteration if not required.
 */
public void iterateOnRealAttributeValue(DescriptorIterator iterator, Object realAttributeValue) {
  super.iterateOnRealAttributeValue(iterator, realAttributeValue);
  ContainerPolicy cp = getContainerPolicy();
  if (realAttributeValue != null && !iterator.shouldIterateOnPrimitives()) {
    for (Object iter = cp.iteratorFor(realAttributeValue); cp.hasNext(iter);) {
      Object wrappedObject = cp.nextEntry(iter, iterator.getSession());
      cp.iterateOnMapKey(iterator, wrappedObject);
    }
  }
}