--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/sun/util/calendar/zi/BackEnd.java	Tue Feb 12 09:25:43 2013 -0800
@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2000, 2004, 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.
+ */
+
+/**
+ * <code>BackEnd</code> is an abstract base class for a back-end of compiling
+ * Olson's zoneinfo database and generating Java zoneinfo database.
+ *
+ * @since 1.4
+ */
+abstract class BackEnd {
+
+    /**
+     * Receives each zone's TimeZone information which was created by
+     * {@link Zoneinfo#parse} in class <code>Zoneinfo</code>,
+     * and processes it.
+     *
+     * @param tz Timezone object for each zone
+     * @return 0 if no error occurred, otherwise 1.
+     */
+    abstract int processZoneinfo(Timezone tz);
+
+    /**
+     * Receives whole information which is generated by JavaZic's front-end
+     * in the form of Mapping object and generates all Java zone information
+     * files.
+     *
+     * @param m Mappings object which is generated by
+     *          {@link Main#compile() Main.compile()}.
+     * @return 0 if no error occurred, otherwise 1.
+     */
+    abstract int generateSrc(Mappings m);
+
+    /**
+     * Decides which backend class should be used and returns its instance.
+     * @return an instance of backend class
+     */
+    static BackEnd getBackEnd() {
+        if (Zoneinfo.isYearForTimeZoneDataSpecified) {
+            return new Simple();
+        } else if (Main.outputDoc) {
+            return new GenDoc();
+        } else {
+            return new Gen();
+        }
+    }
+}