Author: tfmorris
Date: 2007-09-17 12:40:49-0700
New Revision: 13550
Added:
trunk/src_new/org/argouml/util/SingleElementIterator.java
Log:
New iterator that can be used to wrap a single element.
Added: trunk/src_new/org/argouml/util/SingleElementIterator.java
Url: http://argouml.tigris.org/source/browse/argouml/trunk/src_new/org/argouml/util/SingleElementIterator.java?view=auto&rev=13550
==============================================================================
--- (empty file)
+++ trunk/src_new/org/argouml/util/SingleElementIterator.java 2007-09-17 12:40:49-0700
@@ -0,0 +1,67 @@
+// $Id: eclipse-argo-codetemplates.xml 11347 2006-10-26 22:37:44Z linus $
+// Copyright (c) 2007 The Regents of the University of California. All
+// Rights Reserved. Permission to use, copy, modify, and distribute this
+// software and its documentation without fee, and without a written
+// agreement is hereby granted, provided that the above copyright notice
+// and this paragraph appear in all copies. This software program and
+// documentation are copyrighted by The Regents of the University of
+// California. The software program and documentation are supplied "AS
+// IS", without any accompanying services from The Regents. The Regents
+// does not warrant that the operation of the program will be
+// uninterrupted or error-free. The end-user understands that the program
+// was developed for research purposes and is advised not to rely
+// exclusively on the program for any reason. IN NO EVENT SHALL THE
+// UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT,
+// SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS,
+// ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
+// THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF
+// SUCH DAMAGE. THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY
+// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE
+// PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND THE UNIVERSITY OF
+// CALIFORNIA HAS NO OBLIGATIONS TO PROVIDE MAINTENANCE, SUPPORT,
+// UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+
+package org.argouml.util;
+
+import java.util.Iterator;
+import java.util.NoSuchElementException;
+
+/**
+ * A simple iterator wrapper for a single object. Designed for for use where the
+ * API requires an iterator, but we've only got a single object and don't want
+ * the overhead of creating a collection just so that we can iterate over its
+ * single element.
+ *
+ * @param <T> type of object to be iterated over
+ * @author Tom Morris <[email protected]>
+ */
+public class SingleElementIterator<T> implements Iterator {
+
+ private boolean done = false;
+ private T target;
+
+ public SingleElementIterator(T o) {
+ target = o;
+ }
+
+ public boolean hasNext() {
+ if (!done) {
+ return true;
+ }
+ return false;
+ }
+
+ public T next() {
+ if (!done) {
+ done = true;
+ return target;
+ }
+ throw new NoSuchElementException();
+ }
+
+ public void remove() {
+ throw new UnsupportedOperationException();
+ }
+
+}
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