How to compare two dates

Question

Hi,
I have two colums(start date &end date) of data type date in my page and both are optional ones.
I need to have a validation on those date columns,
End date should not be greater than Start Date.
This validation should be triggered once i click on Apply button.
Pseudo Code:
If (endate>startdate)
raise form_trigger_failure;
Can anyone suggest how/where to implement the code, if possible please provide the sample code.
Thanks,
Mahesh

Answer 1

sorry, I was thinking java and not oaf
there is similar thing thats done in tutorials exercise create page part2
this is the code snippet from jdev guide...but you may want to go through the chapter before you put this code in your EO file.
Step 10.2 Add a validateEndDate() method Add the following new method to your EmployeeEOImpl class. /*
* Verifies that the employee's End Date is valid.
* Business Rules:
* This is an optional value which can be updated at any time.
* Cannot be earlier than sysdate.
protected void validateEndDate(Date value)
// If a value has been set, validate it.
if (value != null)
OADBTransaction transaction = getOADBTransaction();
// Note that we want to truncate these values to allow for the possibility
// that we're trying to set them to be the same day. Calling // dateValue( ) does not include time. Were we to want the time element,
// we would call timestampValue(). Finally, you cannot compare
// oracle.jbo.domain.Date objects directly. Instead, convert the value to
// a long as shown.
long sysdate = transaction.getCurrentDBDate().dateValue().getTime();
long endDate = value.dateValue().getTime();
if (endDate < sysdate)
throw new OAAttrValException(OAException.TYP_ENTITY_OBJECT,
getEntityDef().getFullName(), // EO name
getPrimaryKey(), // EO PK
"EndDate", // Attribute Name
value, // Attribute value
"AK", // Message product short name
"FWK_TBX_T_END_DATE_PAST"); // Message name
} // end validateEndDate()