Setting Different Parameters value for a Batch Job

Hello folks, today I got a requirement in Ax 2012 of adding different parameter values for a report running in a batch job. The requirement is to set the default parameter values for a batch job which is different from the values of dialog box . So for this purpose , I have override the method preRunModifyContract() in the controller class. I added the following code in the method preRunModifyContract()

if (this.isInBatch())

{

         contract.parmToDate(1/1/2008);

         contract.parmLedgerToDate(today());

}

Hence! you can change parameters dynamically.

Thanks,