1 package ds.tree; 2 3 4 /** 5 * A simple standard implementation for a {@link visitor}. 6 * 7 * @author Dennis Heidsiek 8 * @param <T,R> 9 */ 10 public abstract class VisitorImpl<T, R> implements Visitor<T, R> { 11 12 protected R result; 13 VisitorImpl()14 public VisitorImpl() { 15 this.result = null; 16 } 17 VisitorImpl(R initialValue)18 public VisitorImpl(R initialValue) { 19 this.result = initialValue; 20 } 21 getResult()22 public R getResult() { 23 return result; 24 } 25 visit(String key, RadixTreeNode<T> parent, RadixTreeNode<T> node)26 abstract public void visit(String key, RadixTreeNode<T> parent, RadixTreeNode<T> node); 27 }