1 /*
   2  * Copyright (c) 2003, 2008, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package sun.management;
  27 
  28 import java.lang.management.ManagementPermission;
  29 import java.util.List;
  30 import javax.management.ObjectName;
  31 import javax.management.MalformedObjectNameException;
  32 
  33 
  34 public class Util {
  35     private Util() {}  // there are no instances of this class
  36 
  37     static RuntimeException newException(Exception e) {
  38         throw new RuntimeException(e);
  39     }
  40 
  41     private static final String[] EMPTY_STRING_ARRAY = new String[0];
  42     static String[] toStringArray(List<String> list) {
  43         return list.toArray(EMPTY_STRING_ARRAY);
  44     }
  45 
  46     public static ObjectName newObjectName(String domainAndType, String name) {
  47         return newObjectName(domainAndType + ",name=" + name);
  48     }
  49 
  50     public static ObjectName newObjectName(String name) {
  51         try {
  52             return ObjectName.getInstance(name);
  53         } catch (MalformedObjectNameException e) {
  54             throw new IllegalArgumentException(e);
  55         }
  56     }
  57 
  58     private static ManagementPermission monitorPermission =
  59         new ManagementPermission("monitor");
  60     private static ManagementPermission controlPermission =
  61         new ManagementPermission("control");
  62     private static ManagementPermission diagnosticCommandPermission =
  63         new ManagementPermission("diagnosticCommand");
  64 
  65     /**
  66      * Check that the current context is trusted to perform monitoring
  67      * or management.
  68      * <p>
  69      * If the check fails we throw a SecurityException, otherwise
  70      * we return normally.
  71      *
  72      * @exception  SecurityException  if a security manager exists and if
  73      *             the caller does not have ManagementPermission("control").
  74      */
  75     static void checkAccess(ManagementPermission p)
  76          throws SecurityException {
  77         SecurityManager sm = System.getSecurityManager();
  78         if (sm != null) {
  79             sm.checkPermission(p);
  80         }
  81     }
  82 
  83     static void checkMonitorAccess() throws SecurityException {
  84         checkAccess(monitorPermission);
  85     }
  86     static void checkControlAccess() throws SecurityException {
  87         checkAccess(controlPermission);
  88     }
  89 
  90     static void checkDiagnosticCommandAccess() throws SecurityException {
  91         checkAccess(diagnosticCommandPermission);
  92     }
  93 }