SWT/JFace Column and Line Span in TableViewer

I need to span some column and rows in a TableViewer. The image bellow pretty much speaks for itself.

http://postimage.org/image/28l8re8lg/

I was thinking of implementing this by making some line invi开发者_高级运维sible(white) but I don't think you can set individual border options for individual cells. Even if i managed this I would stil have to fix the alignment problem of the text in the spanned columns/rows ("Line Span" and "Column Span" in the picture).

I know about the Nebula Grid component, but I can use 3rd party components only as a last resort.

If anybody has any suggestions please share them:). Thanks in advance.