Implementazione parziale di tree

tree/Tree.java

@@ -0,0 +1,33 @@
+package tree;
+
+import exceptions.BoundaryViolationException;
+import exceptions.EmptyTreeException;
+import exceptions.InvalidPositionException;
+import position.Position;
+
+import java.util.Iterator;
+
+/**
+ * Created with xgiovio.macbookair.
+ * User: xgiovio
+ * Date: 07/04/14
+ * Time: 15:17
+ */
+public interface Tree<E> extends Iterable<E> {
+
+
+    public int size();
+    public boolean isEmpty();
+
+    public Iterable<Position<E>> positions ();
+    public E replace (Position<E> v, E e) throws InvalidPositionException;
+    public Position<E> root () throws EmptyTreeException;
+    public Position<E> parent (Position <E> v) throws InvalidPositionException, BoundaryViolationException;
+    public Iterable <Position<E>> children (Position<E> v) throws InvalidPositionException; // anche se e' foglia
+
+    public boolean isInternal (Position<E> v) throws InvalidPositionException;
+    public boolean isExternal (Position<E> v) throws InvalidPositionException;
+    public boolean isRoot (Position <E> v) throws InvalidPositionException;
+
+
+}