@Nullable
private TreePath getSelectedUniquePath() {
JTree tree = getTree();
if (tree == null) return null;
TreePath[] paths = tree.getSelectionPaths();
return paths == null || paths.length != 1 ? null : paths[0];
}
@Nullable
private Object[] getSelectedTreeElements() {
final JTree tree = getTree();
return tree != null ? convertPathsToTreeElements(tree.getSelectionPaths()) : null;
}
private Object[] getSelectedElements() {
final JTree tree = getTree();
return tree != null
? convertPathsToValues(tree.getSelectionPaths())
: ArrayUtil.EMPTY_OBJECT_ARRAY;
}