[Japi-cvs] SF.net SVN: japi:[1278] libs/util/trunk/src

[<chr...@us...>]

Revision: 1278
          http://japi.svn.sourceforge.net/japi/?rev=1278&view=rev
Author:   christianhujer
Date:     2009-05-09 18:30:43 +0000 (Sat, 09 May 2009)

Log Message:
-----------
Added collect method to Collections2.

Modified Paths:
--------------
    libs/util/trunk/src/prj/net/sf/japi/util/Collections2.java

Added Paths:
-----------
    libs/util/trunk/src/tst/test/net/sf/japi/util/Collections2Test.java

Modified: libs/util/trunk/src/prj/net/sf/japi/util/Collections2.java
===================================================================
--- libs/util/trunk/src/prj/net/sf/japi/util/Collections2.java	2009-05-09 18:30:43 UTC (rev 1277)
+++ libs/util/trunk/src/prj/net/sf/japi/util/Collections2.java	2009-05-09 18:30:43 UTC (rev 1278)
@@ -180,4 +180,16 @@
         }
     }
 
+    /** Collects items from an Iterator into a Collection.
+     * @param c Collection to which the items shall be collected.
+     * @param iterator Iterator from which to collect items.
+     * @return <var>c</var> after the items from <var>iterator</var> have been added to it.
+     */
+    public static <T, C extends Collection<T>> C collect(final C c, final Iterator<T> iterator) {
+        while (iterator.hasNext()) {
+            c.add(iterator.next());
+        }
+        return c;
+    }
+
 } // class Collections2

Added: libs/util/trunk/src/tst/test/net/sf/japi/util/Collections2Test.java
===================================================================
--- libs/util/trunk/src/tst/test/net/sf/japi/util/Collections2Test.java	                        (rev 0)
+++ libs/util/trunk/src/tst/test/net/sf/japi/util/Collections2Test.java	2009-05-09 18:30:43 UTC (rev 1278)
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2009  Christian Hujer.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+package test.net.sf.japi.util;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Set;
+import net.sf.japi.util.Collections2;
+import org.junit.Assert;
+import org.junit.Test;
+
+/** Test for {@link Collections2}.
+ * @author <a href="mailto:ch...@ri...">Christian Hujer</a>
+ */
+public class Collections2Test {
+
+    /** Test case for {@link Collections2#collect(Collection, Iterator)}. */
+    @Test
+    public void testCollect() {
+        final Set<String> original = Collections.unmodifiableSet(new HashSet<String>(Arrays.asList("foo", "bar")));
+        final Set<String> collected = Collections2.collect(new HashSet<String>(), original.iterator());
+        Assert.assertEquals("Collect must collect all elements.", original, collected);
+    }
+
+}


Property changes on: libs/util/trunk/src/tst/test/net/sf/japi/util/Collections2Test.java
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Added: svn:mime-type
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