Compute total based on separate iterator bindings

Question

I have two view objects which are each producing a single value exposed on a page. I want to add those two values together to show the total. The values are exposed on the page with the following EL expressions:
<af:outputText value="#{bindings.SumAmount1.inputValue}" id="ot36">
<af:convertNumber groupingUsed="false"
     pattern="#{bindings.SumAmount1.format}"/>
</af:outputText>
<af:outputText value="#{bindings.SumAmount2.inputValue}"
id="ot38">
<af:convertNumber groupingUsed="false"
pattern="#{bindings.SumAmount2.format}"/>
</af:outputText>
I want to show the total as the addition of the SumAmount1 and SumAmount2 values.
Doing the following only works when there is no format type:
<af:outputText id="totalAmount"
value="#{bindings.SumAmount1.inputValue.value + bindings.SumAmount2.inputValue.value}"/>
How can I easily achieve what I want while still using a control hints -> format type on the attributes?
Thanks,
Stephen
Edited by: 910447 on Jul 11, 2012 8:30 AM

Answer 1

Surendranath Kumar wrote:
Try this.
<af:outputText id="totalAmount" value="#{bindings.SumAmount1.inputValue.value} + #{ bindings.SumAmount2.inputValue.value}"/>That won't work. That statement prints out a literal "+". To do arithmatic operations it needs to all be in the same expression #{}.
There is something I am not getting about EL expressions and type conversion. Without any sort of convertNumber format the values are being used as Numbers like I want, but once I apply a convertNumber format to them the inputValue property seems to come back as a String. I tried putting a convertNumber on the outputText where I'm generating the total, but I wind up getting a NumberFormatException:
<RegistrationConfigurator> <handleError> ADF_FACES-60096:Server Exception during PPR, #1
java.lang.NumberFormatException: For input string: "-23,692"