import java.lang.management.*;
import javax.management.*;

/**
 * Simple test to demonstrate JRockit Bug on Windows and RHEL (and possibly other platforms)
 *
 * The problem only appears under JRockit and it is really a JVM bug.
 * The same test passes with Sun's JVM.
 * 
 * java version "1.5.0_06"
 * Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_06-b05)
 * BEA JRockit(R) (build R26.4.0-63-63688-1.5.0_06-20060626-2259-win-ia32, )
 *
 * OS/Kernel/Arch = RHEL4/U4 - Linux 2.6.9-42.0.2.ELsmp 
 * #1 SMP Thu Aug 17 17:57:31 EDT 2006 x86_64 x86_64 x86_64 GNU/Linux
 * JVM = R26.4.0-63_CR284516-68626-1.5.0_06-20060926-0859-linux-x86_64 
 * 
 * From jmx 1.2 spec, Chapter 2, MBean Instrumentation (pp57):
 * 
 * MBeanAttributeInfo Class 
 * "The isIs method will return true if this attribute has a boolean type
 * and a getter method with the is prefix (versus the get prefix); otherwise
 * it will return false. Note that this information is only relevant
 * for a standard MBean".
 *
 * Original Issue 
 * see http://jira.jboss.com/jira/browse/JBAS-3746
 */
public class TestMBeanAttributeInfo
{
   public static void main(String args[]) throws Exception
   {
      MBeanServer server = ManagementFactory.getPlatformMBeanServer();
      ObjectName oname = new ObjectName(":name=mbeanInfoTest");
      server.registerMBean(new Simple(), oname);
      MBeanInfo info = server.getMBeanInfo(oname);
      MBeanAttributeInfo attr = info.getAttributes()[0];
      System.out.println(
         "Attribute '" + attr.getName() +
         "' : type=" + attr.getType() +
         ", isReadable=" + attr.isReadable() +
         ", isWriteable=" + attr.isWritable() +
         ", isIs=" + attr.isIs());
      
      if (attr.isIs() == false)
      {
         System.err.println("ERROR: MBeanAttributeInfo.isIs() returns false, it should be true");
         System.exit(1);
      }
   }
   
   public static class Simple implements SimpleMBean
   {
      private boolean someBoolean;
   
      public boolean isSomeBoolean() { return someBoolean; } 
      public void setSomeBoolean(boolean someBoolean) { this.someBoolean = someBoolean; }
   }
   
   public interface SimpleMBean
   {
      boolean isSomeBoolean(); 
      void setSomeBoolean(boolean someBoolean);
   }
}