[Repast-developer] RasterSpace Bug

[Bill R. <wr...@um...>]

	I've been trying to send this message to the *@src.uchicago.edu 
addresses but it keeps getting bounced back, so I thought I'd send it this 
way.
-Bill

-- 

        Not sure if this is the right address to send this to, but I
couldn't find any place else on the repast website.

        So I'm working with the RasterSpace class, and I wrote a subclass
that I'm calling QualitySpace.  Initially I tried to use the fully
detailed RasterSpace constructor in the following way:

        // this simple constructor just calls the parent constructor with
the
        //   right world sizes
        QualitySpace(int x, int y) {
                super(0,y,x,0,1,x,y);
        }

        x and y are the respective size of the world.  I was thinking
RasterSpace numbered from upper left to bottom right, hence why the y and
x are where they are in the constructor call.  However GIS numbers from
lower left to upper right, so my plan was incorrect.  I would expect then
when I make this call that the constructor would crash and I would get an
error message, but it got past this and didn't crash till I attempted to
get the size of the space at which point I got the following error stack:

alveare-ARMSR$ java.lang.NullPointerException
        at
uchicago.src.sim.space.RasterSpace.putValueAt(RasterSpace.java:295)
        at ARMSR.QualitySpace.initializeNormalMean(QualitySpace.java:39)
        at ARMSR.QualitySpace.initializeNormalMean(QualitySpace.java:39)
        at ARMSR.Model.createQualitySpaces(Model.java:111)
        at ARMSR.Model.buildModel(Model.java:657)
        at ARMSR.Model.begin(Model.java:773)
        at
uchicago.src.sim.engine.BaseController.beginModel(BaseController.java:337)
..blahblahblah...

        Where the line in my code in QualitySpace.java is:

               for ( x=0; x<getSizeX(); x++) {

        Anyway, probably not a big deal but it seems to me this should be
throwing an error in the constructor not waiting till I attempt to put a
value.
Take care,
Bill