Hi,
i added some slight modifications to my app, in particular to adding the
createStyle func and cleaning my main file. When running the app, i keep
getting the following error:
Exception in thread "main" java.lang.ClassCastException:
com.mycompany.Map_AppV2.ConstructStyle cannot be cast to
org.geotools.styling.Style
at com.mycompany.Map_AppV2.ConstructMap.<init>(ConstructMap.java:84)
at com.mycompany.Map_AppV2.MapApp.main(MapApp.java:13)
I looked in my ConstructMap.java file and noticed that it was pointing to
this particular line of code:
mapContext.addLayer(myFeatureSource,(Style) constrStyle);
and i then looked at my ConstructStyle java file but in my constructor is
currently empty, becuase i commented all that code out to include the
construct style func. How do i tell the app that the object constrStyle in
my ConstructMap.java file is an implementation of the StyleFactory? Even
though i already have addes this. Because when i try to open my shapefile,
it is not displayed.
Cheers
Michael Bedward wrote:
>
>> The reason i ask is beacuse very early on when following some of the
>> tutorials in my ConstructMap.java i created a constrStyle object passed
>> the
>> following:
>>
>> // Pass file and feature schema referrence to myCreateStyle function
>> constrStyle.myCreateStyle(file, myFeatureTypeSchema);
>
> There are various ways of doing it but the way I suggested is simple
> and should work. I like simple things :-)
>
>> can be commented away, which i guess is yes :( (all that hardwork)?
>
> My own learning is like that too. Ratio of code written / code used =
> very large number
>
>> I have general question here that i would like to ask, when creating
>> styles/symbolizers for a shap file, how does one know what he or she
>> needs
>> to create?
>
> You need to know if you're drawing points, lines or polygons. If
> you're not sure what type of geometry a feature is you can query it,
> for example...
>
> Geometry geom = (Geometry) aFeature.getDefaultGeometry();
> String typeName = geom.getGeometryType();
>
> Hope this helps
>
> Michael
>
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