Re: [Repast-interest] Error java.lang.reflect.InvocationTargetException

[David W. <d.a...@st...>]

Hello Nick,

That was indeed the problem, i forgot to make a reference to the contexts
that are created in the ContextCreator.

Thanks for your response,

David Watson

Nick Collier wrote:
> 
> David,
> 
> Its more likely cityContext is null. Try setting a break point and
> stepping through the code and inspect the variables to see which or null.
> Alternatively, print out all the variables.
> 
> Nick
> 
> On Aug 24, 2011, at 8:19 AM, David Watson wrote:
> 
>> 
>> Hello Everybody,
>> 
>> I have been faced with a problem for a couple of days now. When i run my
>> model i get the following error:
>> 
>> Shop: 1currentCoordinate:-1.5167303701124346-1.5167303701124346
>> The value of j is: 1
>> Shop: 2Coordinate:-1.5163776299854885-1.5163776299854885
>> At position 2 now
>> currentCoordinate:-1.5167303701124346-1.5167303701124346
>> Tried to call: public void
>> carriercontext.Carrier.execution()java.lang.reflect.InvocationTargetException
>> 	at
>> carriercontext.Carrier$$FastClassByCGLIB$$b39fefa1.invoke(<generated>)
>> 	at net.sf.cglib.reflect.FastMethod.invoke(FastMethod.java:53)
>> 	at
>> repast.simphony.engine.schedule.CallBackAction.execute(CallBackAction.java:127)
>> 	at
>> repast.simphony.engine.schedule.ThreadedAction$ActionRunner.run(ThreadedAction.java:102)
>> 	at java.lang.Thread.run(Unknown Source)
>> Caused by: java.lang.NullPointerException
>> 	at citycontext.DistanceTable.createDistanceTable(DistanceTable.java:86)
>> 	at vrp.MyObjectiveFunction.<init>(MyObjectiveFunction.java:69)
>> 	at vrp.VRP.<init>(VRP.java:31)
>> 	at carriercontext.Carrier.startVRP(Carrier.java:198)
>> 	at carriercontext.Carrier.execution(Carrier.java:74)
>> 	... 5 more
>> 
>> As you can see, the error is presumably caused by the NullPointer
>> exception.
>> The code that is throwing this exception is:
>>                                             shp = ShopList.get(i);
>> 			                     currentCoord = shp.getShopCoordinate();
>> 			                     /*currentCoord =
>> ContextCreator.getShopGeography().
>> 			                    
>> getGeometry(ShopList.get(i)).getCentroid().getCoordinate();*/
>> 			
>> 			                     shp2 = ShopList.get(j);
>> 			                     destCoord = shp2.getShopCoordinate();
>> 			                    /*destCoord = ContextCreator.getShopGeography().
>> 			                   
>> getGeometry(ShopList.get(j)).getCentroid().getCoordinate();*/
>> 		
>> This is throwing the exception--->currentRoad =
>> cityContext.findRoadAtCoordinates(currentCoord);
>> 			                     destRoad =
>> cityContext.findRoadAtCoordinates(destCoord);
>> 
>> What i can't seem to figure out is the reason for this exception because
>> the
>> variable currentCoord is not equal to NULL when passed to the method. I
>> have
>> validated this by printing the value of currentCoord:
>> currentCoordinate:-1.5167303701124346-1.5167303701124346. Why would it
>> throw
>> this exception, is there something i am overlooking?
>> 
>> Can somebody help me with this i am really getting stuck now.
>> 
>> Kind regards,
>> 
>> David Watson
>> 
>> -- 
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>> 
>> 
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> 
> 
> ------------------------------------------------------------------------------
> EMC VNX: the world's simplest storage, starting under $10K
> The only unified storage solution that offers unified management 
> Up to 160% more powerful than alternatives and 25% more efficient. 
> Guaranteed. http://p.sf.net/sfu/emc-vnx-dev2dev
> _______________________________________________
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