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Re: [Repast-interest] [J-XXXXX] Re: GIS in Simphony
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From: Nick C. <nic...@gm...> - 2010-04-26 12:48:12
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I need to see your ContextCreator code to say anything useful.
Nick
On Apr 25, 2010, at 4:57 AM, kakald wrote:
>
> Hi Nick,
> I have had the same problem. I have 2 contexts : PeopleContext and
> HouseContext. I create a "ContextCreator extends ContextBuilder"
> like in
> demo repastcity which is to get 2 contexts and geographys above. But
> the
> progam inform that "java.lang.NullPointerException
> at eva.ContextCreator.getPersonContext(ContextCreator.java:34)"
>
> Can you help me?
> Thanks.
>
> Kakald.
>
>
> Christophe Chevallier wrote:
>>
>> Hello,
>>
>> and thank you Nick for your help.
>>
>> Actually I have had the same problem as Steve : creating the java
>> ContextCreator class allowed me to
>> get through the error at the init() stage, but I got the next
>> Exception at
>> the
>> DisplayGIS.resetHomeView() stage. I have tried to apply your new
>> suggestions, but I can't make it.
>> When I proceed with a manual java ContextCreator and
>> ShapefileLoader as
>> you described, my
>> ShapefileLoader does indeed load an agent for each point defined in
>> my
>> shape file (the bugsites.shp
>> that is available in the /repast.simphony.gis/sampleData folder). I
>> verified this by using the
>> geography.getAllObjects() command you mentioned.
>>
>> I can avoid the error if I manually add a layer using the add-gis-
>> display
>> wizard in the RepastS
>> runtime, refering to another shape file in the RepastS runtime,
>> such as
>> roads.shp. Doing so, the GIS
>> display comes up at initialization stage, with the roads.shp loaded.
>> However, although my
>> ContextCreator is written to add agents to the gis projection, the
>> agents
>> I add don't appear.
>>
>> I will send you my files in a private mail, to see if you can make
>> them
>> work?
>>
>> Christophe.
>>
>> Nick Collier a écrit :
>>> Steve,
>>>
>>> This error occurs when we try to get to the layer bounds (as an
>>> envelope) from the mapContext. I've noticed that this will return
>>> null if the mapContext contains no layers which in turn will occur
>>> if
>>> the geography has nothing in it.
>>>
>>> Can you you check if the geography contains agents --
>>> Geography.getAllObjects after you do the shapefile loading should
>>> return an iterable over the agents in the geography. If there are
>>> agents, then can you send me your scenario and code and I'll try to
>>> run it here.
>>>
>>> Here's what I do in my ContextCreator and it works:
>>>
>>> GeographyParameters geoParams = new GeographyParameters();
>>> Geography geography =
>>> GeographyFactoryFinder.createGeographyFactory(null)
>>> .createGeography("Geography", context, geoParams);
>>>
>>> File file = new File("/Users/nick/tmp/another.shp");
>>> ShapefileLoader loader = null;
>>> try {
>>> loader = new ShapefileLoader(GisAgent.class, file.toURL(),
>>> geography, context);
>>> while (loader.hasNext()) loader.next();
>>> } catch (MalformedURLException e) {
>>> e.printStackTrace();
>>> }
>>>
>>>
>>> Note that once you create the loader, you have to call loader.next()
>>> in the while loop to actually create the agents. This a bit a
>>> cumbersome when you don't actually need a reference to the created
>>> objects to perform any additional operations. I'll add convenience
>>> method that just creates them all.
>>>
>>> Btw, I've fixed the DisplayGIS so it won't abort with the NPE if the
>>> geography is empty. That should be part of the next update.
>>>
>>> Nick
>>>
>>> On Dec 12, 2007, at 11:40 PM, Stephen Wendel wrote:
>>>
>>>> Hi Nick,
>>>>
>>>> Following to your directions, I've gotten past the error mentioned
>>>> previously. But, I've reached a snag a little further down the
>>>> line
>>>> with Geography objects, and wonder if you could help? Namely, I
>>>> have
>>>> created my own ContextBuilder (similar to your example below),
>>>> created
>>>> the Geography, and loaded a shapefile full of features via
>>>> ShapeFileLoader (as shown in the JUnit test case). Once the GIS
>>>> display is about to be shown, I get an error:
>>>>
>>>> java.lang.NullPointerException
>>>> at
>>>> repast.simphony.visualization.gis.DisplayGIS.resetHomeView
>>>> (DisplayGIS.java:330)
>>>>
>>>>
>>>> From the source, it looks like the Envelope is not set properly --
>>>> but
>>>> I haven't found where it was supposed to be set. I've included
>>>> the
>>>> full error below. I'm using a Dell Vostro 1500, Running Windows XP
>>>> (SP2), with the SourceForge Windows Installer of Simphony 1
>>>> (downloaded
>>>> Dec 5 2007).
>>>>
>>>> thanks for any and all help,
>>>> -Steve
>>>>
>>>> Full Error:
>>>>
>>>> INFO [main] 23:12:36,031 saf.core.runtime.Boot - logging system
>>>> initialized
>>>> INFO [AWT-EventQueue-0] 23:15:20,015
>>>> repast.simphony.gis.display.PGISCanvas - Prop Change start
>>>> INFO [AWT-EventQueue-0] 23:15:20,015
>>>> repast.simphony.gis.display.PGISCanvas - Prop chang end
>>>> INFO [AWT-EventQueue-0] 23:15:20,046
>>>> repast.simphony.gis.display.PGISCanvas -
>>>> repast.simphony.gis.tools.ScaleDenominatorChanged@4301c9
>>>> ERROR [AWT-EventQueue-0] 23:15:21,234
>>>> repast
>>>> .simphony.visualization.engine.DisplayComponentControllerAction
>>>> -
>>>> Error while creating displays
>>>> java.lang.NullPointerException
>>>> at
>>>> repast.simphony.visualization.gis.DisplayGIS.resetHomeView
>>>> (DisplayGIS.java:330)
>>>>
>>>> at
>>>> repast.simphony.visualization.gis.DisplayGIS.getPanel
>>>> (DisplayGIS.java:249)
>>>> at
>>>> repast.simphony.engine.environment.DefaultGUIRegistry.addDisplay
>>>> (DefaultGUIRegistry.java:124)
>>>>
>>>> at
>>>> repast
>>>> .simphony.visualization.engine.DisplayComponentControllerAction.
>>>> runInitialize(DisplayComponentControllerAction.java:82)
>>>>
>>>> at
>>>> repast.simphony.engine.controller.DefaultController$2.visit
>>>> (DefaultController.java:171)
>>>>
>>>> at
>>>> repast.simphony.engine.controller.DefaultController$2.visit
>>>> (DefaultController.java:1)
>>>>
>>>> at
>>>> repast.simphony.util.collections.NaryTree.preOrderTraverals
>>>> (NaryTree.java:287)
>>>>
>>>> at
>>>> repast.simphony.util.collections.NaryTree.preOrderTraverals
>>>> (NaryTree.java:290)
>>>>
>>>> at
>>>> repast.simphony.util.collections.NaryTree.preOrderTraverals
>>>> (NaryTree.java:290)
>>>>
>>>> at
>>>> repast.simphony.util.collections.NaryTree.preOrderTraversal
>>>> (NaryTree.java:283)
>>>>
>>>> at
>>>> repast.simphony.engine.controller.DefaultController.runInitialize
>>>> (DefaultController.java:169)
>>>>
>>>> at
>>>> repast.simphony.engine.controller.DefaultController.runInitialize
>>>> (DefaultController.java:317)
>>>>
>>>> at repast.simphony.ui.RSApplication.initSim(RSApplication.java:
>>>> 121)
>>>> at repast.simphony.ui.action.InitRun.actionPerformed
>>>> (InitRun.java:17)
>>>> at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
>>>> at javax.swing.AbstractButton$Handler.actionPerformed(Unknown
>>>> Source)
>>>> at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown
>>>> Source)
>>>> at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
>>>> at
>>>> javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown
>>>> Source)
>>>> at java.awt.AWTEventMulticaster.mouseReleased(Unknown Source)
>>>> at java.awt.Component.processMouseEvent(Unknown Source)
>>>> at javax.swing.JComponent.processMouseEvent(Unknown Source)
>>>> at java.awt.Component.processEvent(Unknown Source)
>>>> at java.awt.Container.processEvent(Unknown Source)
>>>> at java.awt.Component.dispatchEventImpl(Unknown Source)
>>>> at java.awt.Container.dispatchEventImpl(Unknown Source)
>>>> at java.awt.Component.dispatchEvent(Unknown Source)
>>>> at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown
>>>> Source)
>>>> at java.awt.LightweightDispatcher.processMouseEvent(Unknown
>>>> Source)
>>>> at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
>>>> at java.awt.Container.dispatchEventImpl(Unknown Source)
>>>> at java.awt.Window.dispatchEventImpl(Unknown Source)
>>>> at java.awt.Component.dispatchEvent(Unknown Source)
>>>> at java.awt.EventQueue.dispatchEvent(Unknown Source)
>>>> at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown
>>>> Source)
>>>> at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown
>>>> Source)
>>>> at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
>>>> at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
>>>> at java.awt.EventDispatchThread.run(Unknown Source)
>>>>
>>>>> ------------------------------
>>>>>
>>>>> Message: 2
>>>>> Date: Wed, 12 Dec 2007 10:29:59 -0500
>>>>> From: Nick Collier <nic...@ve...>
>>>>> Subject: Re: [Repast-interest] GIS in Simphony
>>>>> To: "Sco...@cs...> <Sco...@cs..."
>>>>> <Sco...@cs...>, Christophe Chevallier
>>>>> <Chr...@en...>
>>>>> Cc: repast-interest <rep...@li...>
>>>>> Message-ID: <DB7...@ve...>
>>>>> Content-Type: text/plain; charset="windows-1252"
>>>>>
>>>>> Scott & Christophe,
>>>>>
>>>>> What you've done so far is missing one step, I think. You'll
>>>>> need to
>>>>> get your agents moved into the geography. The details on that
>>>>> can be
>>>>> found here:
>>>>>
>>>>> http://repast.sourceforge.net/docs/reference/SIM/GIS%
>>>>> 20Projections.html
>>>>>
>>>>> Alternatively, you can specify a shapefile as an agent attribute
>>>>> in
>>>>> your model.score:
>>>>>
>>>>> <agents label="MyAgent" ID="myAgent">
>>>>> <implementation className="MyAgent" mode="LOAD"/>
>>>>> <attributes label="Shapefile Source" sType="STRING"
>>>>> ID="shpFile"
>>>>> defaultValue="/Users/nick/tmp/another.shp" />
>>>>> </agents>
>>>>>
>>>>>
>>>>> If a shapefile is specified, simphony will create as many agents
>>>>> as
>>>>> there are features in the shapefile and assign each features
>>>>> geometry
>>>>> to an agent. Where possible attribute values in the shape file
>>>>> will
>>>>> be set on the agent. For example, if the agent has get/setWealth
>>>>> methods and the feature has a wealth attribute then each agent's
>>>>> wealth will be set to the wealth value of the corresponding
>>>>> feature.
>>>>>
>>>>> Note that if you use the shapefile method, you don't need to use
>>>>> the
>>>>> composer in the runtime to click and add agents and you can
>>>>> leave the
>>>>> DataLoader as a ScoreContextBuilder.
>>>>>
>>>>>
>>>>> Lastly, you can write your own ContextBuilder that will do all the
>>>>> agent creation and projection adding by hand. For example,
>>>>>
>>>>> public class GISExampleCreator implements
>>>>> ContextBuilder<GisAgent> {
>>>>>
>>>>>
>>>>> public Context build(Context<GisAgent> context) {
>>>>>
>>>>> GeographyParameters geoParams = new GeographyParameters();
>>>>> Geography geography =
>>>>> GeographyFactoryFinder
>>>>> .createGeographyFactory(null) .createGeography
>>>>> ("Geography", context, geoParams);
>>>>>
>>>>> GridFactoryFinder.createGridFactory(null).createGrid("Grid",
>>>>> context,
>>>>> GridBuilderParameters.multiOccupancy2D(new
>>>>> RandomGridAdder(), new StickyBorders(),
>>>>> 30, 30));
>>>>>
>>>>> GeometryFactory fac = new GeometryFactory();
>>>>>
>>>>> for (int i = 0; i < 10; i++) {
>>>>> GisAgent agent = new GisAgent();
>>>>> context.add(agent);
>>>>> agent.setWealth(i);
>>>>> Coordinate coord = new Coordinate(-103.823 + i / 100.0,
>>>>> 44.373);
>>>>> Point geom = fac.createPoint(coord);
>>>>> geography.move(agent, geom);
>>>>> }
>>>>>
>>>>>
>>>>> return context;
>>>>> }
>>>>> }
>>>>>
>>>>> This creates a Geography using the GeographyFactory (see the docs
>>>>> referenced above for more info) and then the loop creates 10
>>>>> agents
>>>>> and associates each one with a point geometry by moving each each
>>>>> into the geography with a specified Point geometry. Note that my
>>>>> agent just happens to be a called GISAgent here. There's nothing
>>>>> gis
>>>>> specific to it other than its being used in GIS example. Any agent
>>>>> should work.
>>>>>
>>>>> To use a hand-made ContextBuilder, right click on Data Loaders,
>>>>> choose set DataLoader and then "A Specific Java Class". The name
>>>>> of
>>>>> your ContextBuilder should appear in the comboBox.
>>>>>
>>>>> Nick
>>>>>
>>>>>
>>>>> On Dec 11, 2007, at 6:38 PM, <Sco...@cs...>
>>>>> <Sco...@cs...> wrote:
>>>>>
>>>>
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>
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