Field level Modified()

The following code is for to compare the  modified field value on form level :

Go to form Datasource(My datasource is JpSampleTable) field level and override the field's modified() as -


public void modified()
{
    if(JpSampleTable.JoinDate < JpSampleTable.orig().JoinDate)
        info("Modified date " +strfmt("%1",JpSampleTable.orig().JoinDate)+ " is less than "+strfmt("%1",JpSampleTable.JoinDate));
    super();
}