Fix trigger of event handlers without filters and not bound to a document

        Object obj = ctx.getInput();
        DocumentModel doc = null;
        if (obj instanceof DocumentModel) {
            doc = (DocumentModel) obj;
        }
        if (doctypes != null) {
            if (doc == null
                    || (!doctypes.isEmpty() && !doctypes.contains(doc.getType()))) {
                return false;
            }
        }

if (doctypes != null || doctypes.size() > 0) {