--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.base/share/classes/sun/util/cldr/CLDRCalendarNameProviderImpl.java	Wed Jul 04 11:55:11 2018 +0530
@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2018, 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 sun.util.cldr;
+
+import static sun.util.locale.provider.LocaleProviderAdapter.Type;
+
+import java.util.Locale;
+import java.util.Set;
+import sun.util.locale.provider.AvailableLanguageTags;
+import sun.util.locale.provider.CalendarNameProviderImpl;
+import sun.util.locale.provider.LocaleProviderAdapter;
+
+
+public class CLDRCalendarNameProviderImpl extends CalendarNameProviderImpl implements AvailableLanguageTags{
+
+    public CLDRCalendarNameProviderImpl(Type type, Set<String> langtags) {
+        super(type, langtags);
+    }
+
+    @Override
+    public boolean isSupportedLocale(Locale locale) {
+        if (Locale.ROOT.equals(locale)) {
+            return true;
+        }
+        String calendarType = null;
+        if (locale.hasExtensions()) {
+            calendarType = locale.getUnicodeLocaleType("ca");
+            locale = locale.stripExtensions();
+        }
+        if (calendarType != null) {
+            switch (calendarType) {
+                case "buddhist":
+                case "japanese":
+                case "gregory":
+                case "islamic":
+                case "roc":
+                    break;
+                default:
+                    // Unknown calendar type
+                    return false;
+            }
+        }
+        return LocaleProviderAdapter.forType(Type.CLDR).isSupportedProviderLocale(locale, langtags);
+    }
+}