Migliroato positions e agiunto come metodo alla interfaccia position. Fixato alcuni bug. Aggiunto test della prova intercorso del 10/4/14. Bisogna implementare tree

iterator/IterablePosition.java

@@ -0,0 +1,94 @@
+package iterator;
+
+import exceptions.BoundaryViolationException;
+import javafx.geometry.Pos;
+import position.Position;
+import position.PositionList;
+
+import java.util.Iterator;
+import java.util.NoSuchElementException;
+
+/**
+ * Created with MONSTER.
+ * User: xgiovio
+ * Date: 06/04/2014
+ * Time: 21:06
+ */
+
+//iterable of positions implementation with cursor for PositionList data structures.
+
+public class IterablePosition<E> implements Iterable<Position<E>> {
+
+    PositionList<E>  new_structure = null;
+
+    public IterablePosition(PositionList<E> structure){
+
+        new_structure = structure;
+
+    }
+
+
+    @Override
+    public Iterator<Position<E>> iterator() {
+        return new getpositionsiterator(new_structure);
+    }
+
+
+    class getpositionsiterator implements Iterator<Position<E>> {
+
+        PositionList<E>  new_structure = null;
+        Position<E> pos = null;
+
+        public getpositionsiterator (PositionList<E> in){
+              new_structure = in;
+        }
+
+        @Override
+        public boolean hasNext() {
+            if (pos == null){
+                if (new_structure. size() <= 0){
+                    return false;
+                } else {
+                    return true;
+                }
+
+            } else {
+
+                try {
+                    new_structure.next(pos);
+                    return true;
+                }
+                catch (BoundaryViolationException err){
+                    return false;
+
+                }
+
+
+            }
+        }
+
+        @Override
+        public Position<E> next() throws NoSuchElementException {
+            if (hasNext()){
+                if (pos == null){
+                    pos = new_structure.first();
+                }else {
+                    pos = new_structure.next(pos);
+                }
+                return pos;
+            } else{
+                throw new NoSuchElementException();
+            }
+        }
+
+        @Override
+        public void remove() {
+            throw new UnsupportedOperationException ();
+        }
+
+
+
+    }
+
+
+}