--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.scripting.nashorn.shell/share/classes/jdk/nashorn/tools/jjs/JrtPackagesHelper.java	Fri Nov 17 18:43:27 2017 +0530
@@ -0,0 +1,90 @@
+/*
+ * 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.nashorn.tools.jjs;
+
+import java.io.IOException;
+import java.net.URI;
+import java.nio.file.DirectoryStream;
+import java.nio.file.Files;
+import java.nio.file.FileSystem;
+import java.nio.file.FileSystems;
+import java.nio.file.Path;
+import java.util.HashSet;
+import java.util.Set;
+import jdk.nashorn.internal.runtime.Context;
+
+/**
+ * A java packages helper that uses jrt file system.
+ */
+final class JrtPackagesHelper extends PackagesHelper {
+    private final FileSystem jrtfs;
+
+    /**
+     * Construct a new JrtPackagesHelper.
+     *
+     * @param context the current Nashorn Context
+     */
+    JrtPackagesHelper(final Context context) throws IOException {
+        super(context);
+        jrtfs = FileSystems.getFileSystem(URI.create("jrt:/"));
+    }
+
+    @Override
+    void close() throws IOException {
+    }
+
+    @Override
+    Set<String> listPackage(final String pkg) throws IOException {
+        final Set<String> props = new HashSet<>();
+        // look for the /packages/<package_name> directory
+        Path pkgDir = jrtfs.getPath("/packages/" + pkg);
+        if (Files.exists(pkgDir)) {
+            String pkgSlashName = pkg.replace('.', '/');
+            try (DirectoryStream<Path> ds = Files.newDirectoryStream(pkgDir)) {
+                // it has module links under which this package occurs
+                for (Path mod : ds) {
+                    // get the package directory under /modules
+                    Path pkgUnderMod = jrtfs.getPath(mod.toString() + "/" + pkgSlashName);
+                    try (DirectoryStream<Path> ds2 = Files.newDirectoryStream(pkgUnderMod)) {
+                        for (Path p : ds2) {
+                            String str = p.getFileName().toString();
+                            // get rid of ".class", if any
+                            if (str.endsWith(".class")) {
+                                final String clsName = str.substring(0, str.length() - ".class".length());
+                                if (clsName.indexOf('$') == -1 && isClassAccessible(pkg + "." + clsName)) {
+                                    props.add(str);
+                                }
+                            } else if (isPackageAccessible(pkg + "." + str)) {
+                                props.add(str);
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        return props;
+    }
+}