From 351181d38eec032ff7f66d8b54065c5da6e3181d Mon Sep 17 00:00:00 2001
From: Victor Woeltjen <victor.woeltjen@nasa.gov>
Date: Tue, 8 Sep 2015 16:58:15 -0700
Subject: [PATCH] [Time Controller] Allow datum retrieval from histories

WTD-1515
---
 platform/telemetry/src/TelemetryHandle.js       | 9 +++++++--
 platform/telemetry/src/TelemetrySubscription.js | 4 ++++
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/platform/telemetry/src/TelemetryHandle.js b/platform/telemetry/src/TelemetryHandle.js
index 145edfc5d7..1061c6386b 100644
--- a/platform/telemetry/src/TelemetryHandle.js
+++ b/platform/telemetry/src/TelemetryHandle.js
@@ -79,8 +79,7 @@ define(
 
             /**
              * Change the request duration.
-             * @param {object|number} request the duration of historical
-             *        data to look at; or, the request to issue
+             * @param {TelemetryRequest} request the request to issue
              * @param {Function} [callback] a callback that will be
              *        invoked as new data becomes available, with the
              *        domain object for which new data is available.
@@ -107,6 +106,12 @@ define(
                     .then(issueRequests);
             };
 
+            self.getDatum = function (telemetryObject, series, index) {
+                return arguments.length > 1 ?
+                        subscription.getDatum(telemetryObject) :
+                        subscription.makeDatum(telemetryObject, series, index);
+            };
+
             return self;
         }
 
diff --git a/platform/telemetry/src/TelemetrySubscription.js b/platform/telemetry/src/TelemetrySubscription.js
index 8b4d7d7a9c..93539d1ab0 100644
--- a/platform/telemetry/src/TelemetrySubscription.js
+++ b/platform/telemetry/src/TelemetrySubscription.js
@@ -239,6 +239,10 @@ define(
 
             initialize();
             this.unlistenToMutation = addMutationListener();
+
+            // Expose makeDatum for TelemetryHandler to use, but not
+            // as part of public API
+            this.makeDatum = makeDatum;
         }
 
         TelemetrySubscription.prototype.unsubscribeAll = function () {