--- /dev/null	2012-10-16 10:45:25.390681017 -0700
+++ new/src/share/classes/java/util/functions/Mapper.java	2012-10-31 12:59:00.738001664 -0700
@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2010, 2011, 2012 Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code 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 General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package java.util.functions;
+
+/**
+ * Given an input object maps to an appropriate output object. A mapper may
+ * variously provide a mapping between types, object instances or keys and
+ * values or any other form of transformation upon the input.
+ *
+ * @param <T> the type of input objects provided to the {@code map} operation.
+ * @param <R> the type of output objects from {@code map} operation. May be the
+ * same type as {@code <T>}.
+ *
+ * @since  1.8
+ */
+public interface Mapper<T, R> {
+
+    /**
+     * Map the provided input object to an appropriate output object.
+     *
+     * @param t the input object to be mapped.
+     * @return the mapped output object.
+     */
+    R map(T t);
+}