Is there an easy way to copy one attribute value to another in same VO?

Question

Hi All,
I have two attributes Total and Sum in my masterVO (based on masterEO). Sum is transient attribute which calculates the sum of costs from detailVO. Now I want to pass the value from Sum to Total so that Total can have the right value to insert into DB. In VORowImpl file I tried to set the value in the getter method of Total (code below) but it ends in dead loop. Wonder what's the right way for me to do then?
Thanks,
Sophy
public BigDecimal getTotal() {  
setTotal(getSum());
return (BigDecimal) getAttributeInternal(TOTAL);
Edited by: user10366631 on Mar 2, 2012 11:58 AM

Answer 1

Thanks for asking, Timo. In my case we already have this totalCost attribute in the DB table which will be used by others. Whenever user changes a cost in the detailVO from UI, I need to recalculate the totalCost in masterVO and insert it into DB. Hence values in the DB will always match.
I found the way of passing the value of attribute though, whic is code below. Hope it'll help someone else looking for similar problem solution...
public BigDecimal getSumCost() {
if ((BigDecimal)getAttributeInternal(SUMCOST) != this.getTotalCost())
this.setTotalCost((BigDecimal)getAttributeInternal(SUMCOST));
return (BigDecimal)getAttributeInternal(SUMCOST);
}