text: /*****************************************************************************
   * Open MCT, Copyright (c) 2014-2018, United States Government
   * as represented by the Administrator of the National Aeronautics and Space
   * Administration. All rights reserved.
   *
   * Open MCT is licensed under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   * http://www.apache.org/licenses/LICENSE-2.0.
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
   * License for the specific language governing permissions and limitations
   * under the License.
   *
   * Open MCT includes source code licensed under additional open source
   * licenses. See the Open Source Licenses file (LICENSES.md) included with
   * this source code distribution or the Licensing information page available
   * at runtime from the About dialog for additional information.
   *****************************************************************************/
  
  define(
      [],
      function () {
  
          /**
           * Used to handle telemetry delegation associated with a
           * given domain object.
           * @constructor
           * @memberof platform/telemetry
           */
          function TelemetryDelegator($q) {
              this.$q = $q;
          }
  
          /**
           * Promise telemetry-providing objects associated with
           * this domain object (either the domain object itself,
           * or the objects it delegates)
           * @param {DomainObject} the domain object which may have
           *        or delegate telemetry
           * @returns {Promise.<DomainObject[]>} domain objects with
           *          a telemetry capability
           */
          TelemetryDelegator.prototype.promiseTelemetryObjects = function (domainObject) {
              var $q = this.$q;
  
              // If object has been cleared, there are no relevant
              // telemetry-providing domain objects.
              if (!domainObject) {
                  return $q.when([]);
              }
  
              // Otherwise, try delegation first, and attach the
              // object itself if it has a telemetry capability.
              return $q.when(domainObject.useCapability(
                  "delegation",
                  "telemetry"
              )).then(function (result) {
                  var head = domainObject.hasCapability("telemetry")
                          ? [domainObject] : [],
                      tail = result || [];
  
                  return head.concat(tail);
              });
          };
  
          return TelemetryDelegator;
      }
  );
  