How to implement What list all tasks with condition

    In order to list tasks finished within 3 days.Implement system monitor

   condition is to build IWorkflowContext with a role that must have administrator

    do like this

                 pred.addClause(Predicate.AND,
                            TableConstants.WFTASK_EXPIRATIONDATE_COLUMN,
                            Predicate.OP_NEXT_N_DAYS,
                           3);