data_structures_free

net/datastructures/Sequence.java

@@ -0,0 +1,17 @@
+package net.datastructures;
+//begin#fragment Sequence
+/**
+ * An interface for a sequence, a data structure supporting all
+ * operations of a deque, indexed list and position list.
+//end#fragment Sequence
+ * @author Roberto Tamassia, Michael Goodrich
+//begin#fragment Sequence
+ */
+public interface Sequence<E> 
+     extends Deque<E>, IndexList<E>, PositionList<E> {
+  /** Returns the position containing the element at the given index. */
+  public Position<E> atIndex(int r) throws BoundaryViolationException;
+  /** Returns the index of the element stored at the given position. */
+  public int indexOf(Position<E> p) throws InvalidPositionException;
+}
+//end#fragment Sequence