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diff --git a/src/share/classes/sun/rmi/rmic/Names.java b/src/share/classes/sun/rmi/rmic/Names.java
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+/*
+ * Copyright 1996-2003 Sun Microsystems, Inc.  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.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package sun.rmi.rmic;
+
+import sun.tools.java.Identifier;
+
+/**
+ * Names provides static utility methods used by other rmic classes
+ * for dealing with identifiers.
+ *
+ * WARNING: The contents of this source file are not part of any
+ * supported API.  Code that depends on them does so at its own risk:
+ * they are subject to change or removal without notice.
+ */
+public class Names {
+
+    /**
+     * Return stub class name for impl class name.
+     */
+    static final public Identifier stubFor(Identifier name) {
+        return Identifier.lookup(name + "_Stub");
+    }
+
+    /**
+     * Return skeleton class name for impl class name.
+     */
+    static final public Identifier skeletonFor(Identifier name) {
+        return Identifier.lookup(name + "_Skel");
+    }
+
+    /**
+     * If necessary, convert a class name to its mangled form, i.e. the
+     * non-inner class name used in the binary representation of
+     * inner classes.  This is necessary to be able to name inner
+     * classes in the generated source code in places where the language
+     * does not permit it, such as when synthetically defining an inner
+     * class outside of its outer class, and for generating file names
+     * corresponding to inner classes.
+     *
+     * Currently this mangling involves modifying the internal names of
+     * inner classes by converting occurrences of ". " into "$".
+     *
+     * This code is taken from the "mangleInnerType" method of
+     * the "sun.tools.java.Type" class; this method cannot be accessed
+     * itself because it is package protected.
+     */
+    static final public Identifier mangleClass(Identifier className) {
+        if (!className.isInner())
+            return className;
+
+        /*
+         * Get '.' qualified inner class name (with outer class
+         * qualification and no package qualification) and replace
+         * each '.' with '$'.
+         */
+        Identifier mangled = Identifier.lookup(
+                                               className.getFlatName().toString()
+                                               .replace('.', sun.tools.java.Constants.SIGC_INNERCLASS));
+        if (mangled.isInner())
+            throw new Error("failed to mangle inner class name");
+
+        // prepend package qualifier back for returned identifier
+        return Identifier.lookup(className.getQualifier(), mangled);
+    }
+}