--- /dev/null	2017-04-03 15:01:44.000000000 -0700
+++ new/jdk/src/jdk.jlink/share/classes/jdk/tools/jlink/internal/Platform.java	2017-04-03 15:01:44.000000000 -0700
@@ -0,0 +1,66 @@
+/*
+ * Copyright (c) 2017, 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 jdk.tools.jlink.internal;
+
+import jdk.tools.jlink.plugin.ResourcePoolModule;
+
+import java.util.Locale;
+
+/**
+ * Supported platforms
+ */
+public enum Platform {
+    WINDOWS,
+    LINUX,
+    SOLARIS,
+    MACOS,
+    UNKNOWN;
+
+    /**
+     * Returns the {@code Platform} of the given OS name specified
+     * in the {@code ModuleTarget} attribute.
+     *
+     * @param osName OS name in ModuleTarget attribute
+     */
+    public static Platform toPlatform(String osName) {
+        try {
+            return Platform.valueOf(osName.toUpperCase(Locale.ENGLISH));
+        } catch (IllegalArgumentException e) {
+            return Platform.UNKNOWN;
+        }
+    }
+
+    /**
+     * Returns the {@code Platform} to which the given module is target to.
+     */
+    public static Platform getTargetPlatform(ResourcePoolModule module) {
+        String osName = module.osName();
+        if (osName != null) {
+            return toPlatform(osName);
+        } else {
+            return Platform.UNKNOWN;
+        }
+    }
+}