code: private List<MBeanParameterInfo[]> extractMBeanParameterInfos(MBeanServerConnection pServer, JmxExecRequest pRequest,
                                                                    String pOperation)
              throws InstanceNotFoundException, ReflectionException, IOException {
          try {
              MBeanInfo mBeanInfo = pServer.getMBeanInfo(pRequest.getObjectName());
              List<MBeanParameterInfo[]> paramInfos = new ArrayList<MBeanParameterInfo[]>();
              for (MBeanOperationInfo opInfo : mBeanInfo.getOperations()) {
                  if (opInfo.getName().equals(pOperation)) {
                      paramInfos.add(opInfo.getSignature());
                  }
              }
              if (paramInfos.size() == 0) {
                  throw new IllegalArgumentException("No operation " + pOperation +
                          " found on MBean " + pRequest.getObjectNameAsString());
              }
              return paramInfos;
          }  catch (IntrospectionException e) {
              throw new IllegalStateException("Cannot extract MBeanInfo for " + pRequest.getObjectNameAsString(),e);
          }
      }
docs: Extract a list of operation signatures which match a certain operation name. The returned list
  can contain multiple signature in case of overloaded JMX operations.
  
  @param pServer server from where to fetch the MBean info for a given request's object name
  @param pRequest the JMX request
  @param pOperation the operation whose signature should be extracted
  @return a list of signature. If the operation is overloaded, this contains mutliple entries,
  otherwise only a single entry is contained