8149417: Use final restricted flag

Reviewed-by: mullan, weijun, coffeys

src/share/classes/javax/crypto/JceSecurity.java

 /*
- * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 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
@@ -64,8 +64,7 @@ final class JceSecurity {
     private final static Map<Provider, Object> verifyingProviders =
             new IdentityHashMap<>();
 
-    // Set the default value. May be changed in the static initializer.
-    private static boolean isRestricted = true;
+    private static final boolean isRestricted;
 
     /*
      * Don't let anyone instantiate this.

test/javax/crypto/JceSecurity/FinalRestricted.java

+/*
+ * 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.
+ *
+ * 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.
+ */
+
+/*
+ * @test
+ * @bug 8149417
+ * @summary Use final restricted flag
+ */
+
+import java.security.*;
+import java.lang.reflect.*;
+
+public class FinalRestricted {
+
+    public static void main(String[] args) throws Exception {
+
+        int modifiers = Class.forName("javax.crypto.JceSecurity")
+                    .getDeclaredField("isRestricted").getModifiers();
+        if (!(Modifier.isFinal(modifiers) && Modifier.isStatic(modifiers) &&
+                Modifier.isPrivate(modifiers))) {
+            throw new Exception("JceSecurity.isRestricted is not " +
+                                "a private static final field!");
+        }
+    }
+}