ViewObjects/PreparedStatements - ensuring validity

Question

Hi all,
I'm wondering if there is a better way to ensure validity of a ViewObject's query other then setting the parameters in AppModule.prepareSession(oracle.jbo.Session){
ViewObject vo = getMyView();
vo.setWhereClauseParam(0,"%");
} I'm tempted to overide executeQuery() to force parameters to % when they are not yet set...
ROUGHLY
public void executeQuery(){
Object[] oParams = getWhereClauseParams();
for(int i=0,length=oParams.length;i < length;i++)
if( null == oParams[i] ) setWhereClauseParam(i,"%");
super.executeQuery();
}... but I figure there must be a better way of doing this.
Note: I'd like to implement this at the ViewObject level rather then in the AM so that any AM can use the view (or views based on the MyBaseViewObject) w/o having to worry about setting the parameter(s) - worst case it would catch all...
Any thoughts?

Answer 1

Thanks 408279! Very much appreciated. That's exactly what I need. Gotta love those articles by Steve...
Brenden:
Thank you for your post too. What I was trying to do was default any view object (in a base class). Check out Steve's article, it's a very clean solution. Also w/ just a few more lines you can pull out the assigment
Object[] defaultValuesForBindVars = new Object[]{ new Number(10),"NEW YORK"};"and set defaultValuesForBindVars in a method of your BaseViewObject ( setDefaultParams() for example ). Call it from your constructor and you've just ensured that any child class can easily specify defaults for view parameters.
About the code formatting
use [ code ] your code [ / code ] (no spaces)
Note: Always preview your post before submitting it when using square bracket markup for bold [ b ], italic [ i ] or [ code ]; the handler for this on OTN forums is buggy and it sometimes doesn't take all the markup (making your post look like cr*p). I'm not sure why they haven't fixed this yet.
Thanks again for all the help everyone. Very much appreciated!