VisitorLambda simplification

Author: mtumilowicz

src/main/java/visitor/VisitorLambda.java

@@ -9,7 +9,7 @@
 public class VisitorLambda {
 
  public static class LambdaVisitor<A> implements Function<Object, A> {
- private Map<Class<?>, Function<Object, A>> fMap = new HashMap<>();
+ private final Map<Class<?>, Function<Object, A>> fMap = new HashMap<>();
 
  @SuppressWarnings(value = "unchecked")
  public <B> LambdaVisitor<A> addHandler(Class<B> clazz, Function<B, A> handler) {
@@ -41,24 +41,24 @@ public Circle(double radius) {
  }
 
  public static class Rectangle {
- final double weidht;
+ final double width;
  final double height;
 
- public Rectangle( double weidht, double height ) {
- this.weidht = weidht;
+ public Rectangle(double width, double height ) {
+ this.width = width;
  this.height = height;
  }
  }
 
  static Function<Object, Double> areaVisitor = new LambdaVisitor<Double>()
  .addHandler(Square.class, (Square s) -> s.side * s.side )
  .addHandler(Circle.class, c -> Math.PI * c.radius * c.radius )
- .addHandler(Rectangle.class, r -> r.height * r.weidht );
+ .addHandler(Rectangle.class, r -> r.height * r.width);
 
  static Function<Object, Double> perimeterVisitor = new LambdaVisitor<Double>()
  .addHandler(Square.class, s -> 4 * s.side )
  .addHandler(Circle.class, c -> 2 * Math.PI * c.radius )
- .addHandler(Rectangle.class, r -> 2 * r.height + 2 * r.weidht );
+ .addHandler(Rectangle.class, r -> 2 * r.height + 2 * r.width);
 
  public static void main( String[] args ) {
  List<Object> figures = Arrays.asList( new Circle( 4 ), new Square( 5 ), new Rectangle( 6, 7 ) );