How to use

AbstractSynchronizationContentProvider

in

org.eclipse.ltk.ui.refactoring.model

@Override
public boolean hasChildren(final Object element) {
  if (element instanceof ICompilationUnit || element instanceof IFile || element instanceof RefactoringDescriptorProxy || element instanceof RefactoringDescriptor)
    return false;
  return super.hasChildren(element);
}

/**
 * Since the this content provider overrides the resource content provider,
 * this method is only invoked when the resource content provider is
 * disabled. In this case, we still want the Java projects to appear at the
 * root of the view.
 * 
 * {@inheritDoc}
 */
public Object[] getElements(Object parent) {
  if (parent instanceof ISynchronizationContext)
    // Put the resource projects directly under the context
    parent= getModelRoot();
  return super.getElements(parent);
}

@Override
protected Object[] getChildrenInContext(final ISynchronizationContext context, final Object parent, final Object[] children) {
  final Object[] elements= super.getChildrenInContext(context, parent, children);
  if (parent instanceof IPackageFragment)
    return getPackageFragmentChildren(context, parent, elements);
  else if (parent instanceof IPackageFragmentRoot)
    return getPackageFragmentRootChildren(context, parent, elements);
  else if (parent instanceof IJavaProject)
    return getJavaProjectChildren(context, parent, elements);
  else if (parent instanceof RefactoringHistory)
    return ((RefactoringHistory) parent).getDescriptors();
  // It may be the case that the elements are folders that have a corresponding
  // source folder in which case they should be filtered out
  return getFilteredElements(parent, elements);
}

if (!isVisible(new RefactoringDescriptorDiff(proxy, IDiff.CHANGE, proxy.getDirection())))
  result.remove(proxy);

/**
 * Since the this content provider overrides the resource content provider,
 * this method is only invoked when the resource content provider is
 * disabled. In this case, we still want the Java projects to appear at the
 * root of the view.
 *
 * {@inheritDoc}
 */
@Override
public Object[] getElements(Object parent) {
  if (parent instanceof ISynchronizationContext)
    // Put the resource projects directly under the context
    parent= getModelRoot();
  return super.getElements(parent);
}

/**
 * {@inheritDoc}
 */
protected Object[] getChildrenInContext(final ISynchronizationContext context, final Object parent, final Object[] children) {
  final Object[] elements= super.getChildrenInContext(context, parent, children);
  if (parent instanceof IPackageFragment)
    return getPackageFragmentChildren(context, parent, elements);
  else if (parent instanceof IPackageFragmentRoot)
    return getPackageFragmentRootChildren(context, parent, elements);
  else if (parent instanceof IJavaProject)
    return getJavaProjectChildren(context, parent, elements);
  else if (parent instanceof RefactoringHistory)
    return ((RefactoringHistory) parent).getDescriptors();
  // It may be the case that the elements are folders that have a corresponding
  // source folder in which case they should be filtered out
  return getFilteredElements(parent, elements);
}

/**
 * {@inheritDoc}
 */
public boolean hasChildren(final Object element) {
  if (element instanceof ICompilationUnit || element instanceof IFile || element instanceof RefactoringDescriptorProxy || element instanceof RefactoringDescriptor)
    return false;
  return super.hasChildren(element);
}

/**
 * Since the this content provider overrides the resource content provider,
 * this method is only invoked when the resource content provider is
 * disabled. In this case, we still want the Java projects to appear at the
 * root of the view.
 *
 * {@inheritDoc}
 */
@Override
public Object[] getElements(Object parent) {
  if (parent instanceof ISynchronizationContext)
    // Put the resource projects directly under the context
    parent= getModelRoot();
  return super.getElements(parent);
}

@Override
protected Object[] getChildrenInContext(final ISynchronizationContext context, final Object parent, final Object[] children) {
  final Object[] elements= super.getChildrenInContext(context, parent, children);
  if (parent instanceof IPackageFragment)
    return getPackageFragmentChildren(context, parent, elements);
  else if (parent instanceof IPackageFragmentRoot)
    return getPackageFragmentRootChildren(context, parent, elements);
  else if (parent instanceof IJavaProject)
    return getJavaProjectChildren(context, parent, elements);
  else if (parent instanceof RefactoringHistory)
    return ((RefactoringHistory) parent).getDescriptors();
  // It may be the case that the elements are folders that have a corresponding
  // source folder in which case they should be filtered out
  return getFilteredElements(parent, elements);
}

@Override
public boolean hasChildren(final Object element) {
  if (element instanceof ICompilationUnit || element instanceof IFile || element instanceof RefactoringDescriptorProxy || element instanceof RefactoringDescriptor)
    return false;
  return super.hasChildren(element);
}