6657619: DnsContext.debug is public static mutable (findbugs)

Reviewed-by: alanb

src/share/classes/com/sun/jndi/dns/DnsContext.java

 /*
- * Copyright 2000-2007 Sun Microsystems, Inc.  All Rights Reserved.
+ * Copyright 2000-2009 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
@@ -922,7 +922,7 @@ public class DnsContext extends ComponentDirContext {
 
     //---------- Debugging
 
-    public static boolean debug = false;
+    private static final boolean debug = false;
 
     private static final void dprint(String msg) {
         if (debug) {

test/com/sun/jndi/dns/CheckAccess.java

+/*
+ * Copyright 2009 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.
+ *
+ * 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.
+ */
+
+/*
+ * @test
+ * @bug 6657619
+ * @summary DnsContext.debug is public static mutable (findbugs)
+ * @author Vincent Ryan
+ */
+
+import java.lang.reflect.*;
+
+/*
+ * Check that the 'debug' class member is no longer publicly accessible.
+ */
+public class CheckAccess {
+    public static final void main(String[] args) throws Exception {
+        try {
+            Class clazz = Class.forName("com.sun.jndi.dns.DnsContext");
+            Field field = clazz.getField("debug");
+            if (Modifier.isPublic(field.getModifiers())) {
+                throw new Exception(
+                    "class member 'debug' must not be publicly accessible");
+            }
+        } catch (NoSuchFieldException e) {
+            // 'debug' is not publicly accessible, ignore exception
+        }
+    }
+}