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
LayoutUtil.doDefaultLayout(composite, new DialogField[] { fFoldersList, fUseFolderOutputs }, true);
		LayoutUtil.setHorizontalGrabbing(fFoldersList.getTreeControl(null));
		
		int buttonBarWidth= converter.convertWidthInCharsToPixels(24);
		fFoldersList.setButtonsMinWidth(buttonBarWidth);
			
		fSWTControl= composite;
		
		
		List elements= fFoldersList.getElements();
		for (int i= 0; i < elements.size(); i++) {
			CPListElement elem= (CPListElement) elements.get(i);
			IPath[] patterns= (IPath[]) elem.getAttribute(CPListElement.EXCLUSION);
			IPath output= (IPath) elem.getAttribute(CPListElement.OUTPUT);
			if (patterns.length > 0 || output != null) {
				fFoldersList.expandElement(elem, 3);
			}
		}
		return composite;
	}
	
	private Shell getShell() {
		if (fSWTControl != null) {
			return fSWTControl.getShell();
		}
		return JavaPlugin.getActiveWorkbenchShell();
	}
	
	
	private class SourceContainerAdapter implements ITreeListAdapter, IDialogFieldListener {