Creating Custom Validators for ADF in JDev 10.1.3.1

Hi all,
I'm trying to create a validator to solve a seemingly common problem - that is given 2 dates (startDate & endDate), validate that endDate cannot be earlier than startDate.
In my case, both startDate and endDate are in the same form. From the ADF Developers Guide, the recommended approach is to create the validation method on the page's backing bean. But in my application, there are many occurrences of startDate and endDate in other forms, therefore having the validation method on the backing bean might not be the best solution.
I tried to create my own custom validator and tying it to a tag library stated in http://java.sun.com/j2ee/1.4/docs/tutorial/doc/JSFDevelop6.html#wp999130, but that didn't seem to work either. I'm not sure if creating custom validators by extending the ValidatorTag is supported in ADF.
Would appreciate it if someone has any suggestions on how to create the validator that I need, without having validation methods that does the same thing all over my backing beans.
TIA.
Regards,
Lennard

Hi,
of course, ADF Faces supports custom validators because it is compliant to the JSF APIs runnting on the JSF RI.
Another approach for validation would be on the business service level. Assuming you use ADF BC, the EO can have a method validator defined that is automatically inherited by all its views. The disadvantage though is that the error message would have to come from the server, requiring custom error message handling for user friendly messages as described in the developer guide.
Looking forward, in a next release of ADF the binding ayer will allow more complex validations thus not requiring to handle complex validation on teh business service.
So far however I think that using a custom validator is the best you can do. Note that in the case of ADF BC the date is of type oracle.jbo.server.domain.Date and not java.util.Date, which might be a hint to check for your validator issue
Frank

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