1 files changed, 51 insertions, 0 deletions
diff --git a/telecomm/java/android/telecom/TimedEvent.java b/telecomm/java/android/telecom/TimedEvent.java
new file mode 100644
index 000000000000..e484e791f5ef
--- /dev/null
+++ b/telecomm/java/android/telecom/TimedEvent.java
@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * 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
+ */
+
+package android.telecom;
+
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * @hide
+ */
+public abstract class TimedEvent<T> {
+    public abstract long getTime();
+    public abstract T getKey();
+
+    public static <T> Map<T, Double> averageTimings(Collection<? extends TimedEvent<T>> events) {
+        HashMap<T, Integer> counts = new HashMap<>();
+        HashMap<T, Double> result = new HashMap<>();
+
+        for (TimedEvent<T> entry : events) {
+            if (counts.containsKey(entry.getKey())) {
+                counts.put(entry.getKey(), counts.get(entry.getKey()) + 1);
+                result.put(entry.getKey(), result.get(entry.getKey()) + entry.getTime());
+            } else {
+                counts.put(entry.getKey(), 1);
+                result.put(entry.getKey(), (double) entry.getTime());
+            }
+        }
+
+        for (Map.Entry<T, Double> entry : result.entrySet()) {
+            result.put(entry.getKey(), entry.getValue() / counts.get(entry.getKey()));
+        }
+
+        return result;
+    }
+}
+