Jdev3.1/ Validator problem or bug???

Question

Hi,
On one of the entity attributes, i have added a listValidator. this validates against a list of values from a select statement. The problem is that while testing the appl module, once i enter a correct value in the concerned field and tab out. now if i want to go to that field and make it blank, the validation still fires and fails. I want the user to be able to enter a blank value but also want to make sure that if the value is not blank, it is correct.
is there any way of doing it in jdeveloper or will i have to write my own class for such a small thing.
Aparna.

Answer 1

This is actually quite simple once you know how.
All you need to do is write a method:
public boolean validate<Column>( String nv )
I had the liberty of doing this on one
of my entity objects - Customer -
on the attribute name WebSite, so I wrote:
public boolean validateWebSite(String nv) {
//TODO: Add custom implementation.
boolean bValid =
( nv == null ) &#0124; &#0124;
( nv.trim().length() == 0 ) &#0124; &#0124;
( nv.compareTo( "Sample1" ) == 0 ) &#0124; &#0124;
( nv.compareTo( "Sample2" ) == 0 ) &#0124; &#0124;
( nv.compareTo( "Sample3" ) == 0 ) &#0124; &#0124;
( nv.compareTo( "Sample4" ) == 0 ) &#0124; &#0124;
( nv.compareTo( "SampleN" ) == 0 )
return bValid;
And then I went into the Entity Editor
-Right click on Entity and select Edit ...
Click on the Validation tab to go there
Select attribute of choice <WebSite>
Press the Add... button to add a rule to this attribute - Up opens the next dialog.
In the top list of - Rules: - Select MethodValidator
Given a correctly defined method
name and signature, then the method name would appear in the list of candidate methods below and then select it and press OK to accept this method as your validator.
If it does not appear, edit the code so it is correct & compiles.
I did just such a test and what happend
was I could enter Sample1, Sample2, Blank
but nothing else - as I had designed it.
So, it may seem like alot, but writing
one boolean validation method is not alot
of work given how easy the hookup of logic
to the framework happens.
I hope this helps,
-John
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