final SimpleFeatureTypeBuilder simpleFeatureTypeBuilder = new SimpleFeatureTypeBuilder();
simpleFeatureTypeBuilder.setName(GPX_POINT_FEATURE);
final AttributeTypeBuilder attributeTypeBuilder = new AttributeTypeBuilder();
simpleFeatureTypeBuilder.add(attributeTypeBuilder.binding(
Geometry.class).nillable(
true).buildDescriptor(
"geometry"));
simpleFeatureTypeBuilder.add(attributeTypeBuilder.binding(
Double.class).nillable(