/** @return tasks that are not hidden at current time */
public static Criterion isVisible() {
return Task.HIDE_UNTIL.lt(Functions.now());
}
/** @return tasks that have not yet been completed or deleted */
public static Criterion activeAndVisible() {
return Criterion.and(
Task.COMPLETION_DATE.eq(0),
Task.DELETION_DATE.eq(0),
Task.HIDE_UNTIL.lt(Functions.now()));
}