Bug 30630 nested source folders: unclear error message
20030129 create a jproject, a source folder s1 and a nested in it source folder s2 delete s1 open the 'new' wizard and try creating a source folder s1 the error message is very long and compilicated while it should be a simple warning saying 'You have a folder s1 - I will turn it into a source folder fo you' (and then it could automagically add excelusion filter so that s2 is still a source folder)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/wizards/buildpaths/SourceContainerWorkbookPage.java
private final Object[] EMPTY_ARR= new Object[0];
		
		
		public void customButtonPressed(TreeListDialogField field, int index) {
			sourcePageCustomButtonPressed(field, index);
		}
		
		public void selectionChanged(TreeListDialogField field) {
			sourcePageSelectionChanged(field);
		}
		
		public void doubleClicked(TreeListDialogField field) {
			sourcePageDoubleClicked(field);
		}
		public Object[] getChildren(TreeListDialogField field, Object element) {
			if (element instanceof CPListElement) {
				return ((CPListElement) element).getChildren(!fUseFolderOutputs.isSelected());
			}
			return EMPTY_ARR;
		}
		public Object getParent(TreeListDialogField field, Object element) {
			if (element instanceof CPListElementAttribute) {
				return ((CPListElementAttribute) element).getParent();