private Map<String, Object> getOperationParameters(Map<String, String> requestInfoProperties) {
    Map<String, Object> operationParameters = new HashMap<>();

    for (Map.Entry<String, String> entry : requestInfoProperties.entrySet()) {
      String propertyCategory = PropertyHelper.getPropertyCategory(entry.getKey());
      if ((propertyCategory != null) && propertyCategory.equals("parameters")) {
        String name = PropertyHelper.getPropertyName(entry.getKey());
        Object value = entry.getValue();
        operationParameters.put(name, (value == null) ? null : value.toString());
      }
    }

    return operationParameters;
  }
Creates a map of the operation parameters from the data in the request info map.
<p>
Operation parmaters are set under the "parameters" category.

@param requestInfoProperties a map of request info properties
@return a map of operation request parameters
ambari-server/src/main/java/org/apache/ambari/server/controller/internal/RootServiceComponentConfigurationResourceProvider.java