I think Richard Patten wrote:
>
> Hello,
> I have the following command in my JAVA program.
>
> if ( (r.fetch("CustomObject2")) == null){
> //code here
> }
> // r is an instance of the Rete class;
>
> The thing is that the code throws a NullPointerException (the r.fetch command
>seems to be throwing a NullPointerException instead of just returning null), is there
>anyway that I could stop this.
> thanks
fetch is a one-line function:
public Value fetch(String name) {
return (Value) m_storage.get(name);
}
m_storage is an instance of Map, and it's never null (it's constructed
with the Rete object, and never set to another value.) If you're
seeing a NPE at this line in your application, the most likely
explanation is that r itself is null -- check over your code
carefully, and examine the stack trace again.
---------------------------------------------------------
Ernest Friedman-Hill
Distributed Systems Research Phone: (925) 294-2154
Sandia National Labs FAX: (925) 294-2234
Org. 8920, MS 9012 [EMAIL PROTECTED]
PO Box 969 http://herzberg.ca.sandia.gov
Livermore, CA 94550
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