Most of the time, you do not have to create a totally new renderer. You can use one of the default renderers that are supplied in the package and tailor it to your needs.

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

The text is stored in an attribute whose name is provided for the class MarkerTextRenderer. When this text exists, it is returned with the marker generated by the superclass of the renderer; otherwise only the marker is returned.

public IlvGraphic makeGraphic(IlvMapFeature feature,
                              IlvCoordinateTransformation tr)
    throws IlvMapRenderException, IlvCoordinateTransformationException 
  {
    // Let the super class create the marker.
    IlvMarker marker = (IlvMarker)super.makeGraphic(feature, tr);

    // Create label if needed.
    IlvLabel label = null;
    IlvFeatureAttributeProperty attributeList = feature.getAttributes();
    if (attributeList != null) {
      try {
        IlvFeatureAttribute attribute = null;
        attribute = attributeList.getAttribute(myAttributeName);
        if (attribute != null)
          label = new IlvLabel(marker.getPoint(), attribute.toString());
      } catch (IllegalArgumentException e) {
        label = null;
      }
    }

    // Case no label: return marker.
    if (label == null) {
      return marker;
    }
    // Else generate a graphic set containing the marker as the label.
    else {
      // Make this label of the same color than the marker.
      label.setForeground(getPointRenderingStyle().getMarkerColor());

      IlvGraphicSet set = new IlvGraphicSet();
      set.addObject(marker, false);
      set.addObject(label, false);
      return set;
    }
  }