--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.jlink/share/classes/jdk/tools/jlink/plugin/ResourcePoolModuleView.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2016, 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.plugin;
+
+import java.util.Objects;
+import java.util.Optional;
+import java.util.stream.Stream;
+
+/**
+ * The module view of a ResourcePool.
+ */
+public interface ResourcePoolModuleView {
+    /**
+     * Find the module, if any, of the given name.
+     *
+     * @param name name of the module
+     * @return Optional containing the module of the given name.
+     */
+    public Optional<ResourcePoolModule> findModule(String name);
+
+    /**
+     * Find the module, if any, of the given ResourcePoolEntry
+     *
+     * @param entry The ResourcePoolEntry whose module is looked up.
+     * @return Optional containing the module of the given ResourcePoolEntry
+     */
+    public default Optional<ResourcePoolModule> findModule(ResourcePoolEntry entry) {
+        String name = Objects.requireNonNull(entry).moduleName();
+        return name != null? findModule(name) : Optional.empty();
+    }
+
+    /**
+     * The stream of modules contained in this ResourcePool.
+     *
+     * @return The stream of modules.
+     */
+    public Stream<ResourcePoolModule> modules();
+
+    /**
+     * Return the number of ResourcePoolModule count in this ResourcePool.
+     *
+     * @return the module count.
+     */
+    public int moduleCount();
+}