Generic code sample for creating a map

The complete source code for this example can be found in the following file:

<installdir> /jviews-maps/codefragments/readers/src/GenericReader.java

1. Instantiate the reader. In this example, you are using the IlvShapeReader.

    

   try

   {

       featureIterator = new IlvShapeFileReader(shapeFileName, dbfFileName);

   }

   catch (IOException e)

   {

      System.err.println("IOError while instantiating reader");

   }

2. Retrieve the feature renderer from the reader.dted.

   IlvFeatureRenderer renderer =

   featureIterator.getDefaultFeatureRenderer();

3. Create coordinate transformation.

   IlvCoordinateTransformation identity = IlvCoordinateTransformation.CreateTransformation(null, null);

4. Retrieve the first map feature.

    

   IlvMapFeature feature = null;

   try

   {

       feature = featureIterator.getNextFeature();

   }

   catch (IOException io)

   {

       System.err.println("IOExeption while getting next feature"

                          +io.getMessage());

   }

   // Loop on all the available map features.

   while (feature != null)

   {

     try {

5. Create the graphic object representing the map feature.

   IlvGraphic graphic = renderer.makeGraphic(feature, identity);

6. Add the graphic object to the manager.

   manager.addObject(graphic, layerIndex, false);

7. Handle exceptions.

    

   } catch (IlvMapRenderException e)

   {

   // Should not occur: renderer provided by the feature iterator.

   System.out.println("Rendering Exception " + e.getMessage());

   } catch (IlvCoordinateTransformationException cte) {

   System.err.println("Coordinate transformation exception " + cte.getMessage());

   }

   }