I'm writing some Java code in a Notes Agent that processes every single document in a database, apart from those that may exist in certain views.

To test if the document is in a view or not I used this simple function:

private boolean isDocumentInView(lotus.domino.View view, Document doc) 
 throws Exception{
    if (view==null) return false;

    //Evaluate returns either a double of 0.0 or 1.0 for this! Dunno why?
    Vector test = session.evaluate(view.getSelectionFormula(), doc);
    Double result = (Double)test.firstElement();

    return result.equals(1d);
}

I seem to remember discussing this before publically, but can't find any reference to it, so I'm blogging now in the hope somebody finds it useful (or in case I need it again at some point -- as the fact evaluate returns a Double has caught me out more than once now).

Update

Jesse Gallagher made a suggestion and did a little investigation to validate that the following method is much more efficient (see comments for more details):

private boolean isDocumentInView(lotus.domino.ViewNavigator nav, Document doc) 
 throws Exception{
    if (nav==null) return false;

    return nav.gotoEntry(doc);
}

Thanks Jesse! I've updated my code to use this approach instead now.

Obviously you'd define and set the ViewNavigator once at the beginning of the code. You could always simply pass the name of the view as a String to the function and let it get view each time, but that would be plain crazy!