TreeGrid Selection: filter/reduce the selection

[a.reiter]

Hello every body,

i'm using TreeGrid with setSelectionType(SelectionStyle.MULTIPLE);
i get selected nodes with ListGridRecord[] selection = grid.getSelection();

now i would like to filter/reduce the selection array like following:
if a parent and one of his children is selected, this children should be removed from selection.

consider the example of processing a deletion:
a folder node "/folder1/" and one of his children "/folder1/file.xxx" is selected

if a try to delete the selected nodes (ie from a file system), first i delete the folder "/folder1/", the deletion of his children is actually not necessary, any way the error occures, because the file "/folder1/file.xxx" is already deleted...

i hope, the idea/problem is clear, so how can i filter/reduce the selection to match my criteria?

cheers
andre

[a.reiter]

this issue does not seem to be a very popular one...

anyway this is how i solve it manually, looks like its working

    public ListGridRecord[] getReducedSelection() {
        Tree tree = treeGrid.getTree();
        ListGridRecord[] selection = treeGrid.getSelection();
        Set<ListGridRecord> folders = new HashSet<ListGridRecord>();
        // collect all selected folders first:
        for (ListGridRecord lgr : selection) {
            if (lgr.getAttributeAsBoolean("isFolder")) {
                folders.add(lgr);
            }
        }
        // build the result set
        Set<ListGridRecord> result = new HashSet<ListGridRecord>();
        for (ListGridRecord lgr : selection) {
            TreeNode[] parents = tree.getParents((TreeNode) lgr);
            boolean skip = false;
            for (TreeNode p : parents) {
                if (folders.contains(p)) {
                    skip = true;
                    break;
                }
            }
            if (!skip) {
                result.add(lgr);
            }
        }
        return result.toArray(new ListGridRecord[result.size()]);
    }

if anybody can do the trick more elegant, feel free to post another solution

cheers
andre