Converted Observatory heap-profile element

runtime/observatory/lib/src/allocation_profile/allocation_profile.dart

+// Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+part of allocation_profiler;
+
+class AllocationProfile implements M.AllocationProfile {
+  static const _lastServiceGC = 'dateLastServiceGC';
+  final DateTime lastServiceGC;
+  static const _lastAccumulatorReset = 'dateLastAccumulatorReset';
+  final DateTime lastAccumulatorReset;
+  final S.HeapSpace newSpace;
+  final S.HeapSpace oldSpace;
+  final Iterable<ClassHeapStats> members;
+
+  AllocationProfile(S.ServiceMap map)
+    : lastAccumulatorReset = _intString2DateTime(map[_lastAccumulatorReset]),
+      lastServiceGC = _intString2DateTime(map[_lastServiceGC]),
+      oldSpace = new S.HeapSpace()..update(map['heaps']['old']),
+      newSpace = new S.HeapSpace()..update(map['heaps']['new']),
+      members = map['members'].map(_convertMember).toList();
+
+  static DateTime _intString2DateTime(String milliseconds) {
+    if ((milliseconds == null) || milliseconds == '') {
+      return null;
+    }
+    return new DateTime.fromMillisecondsSinceEpoch(int.parse(milliseconds));
+  }
+
+  static ClassHeapStats _convertMember(S.ServiceMap map) {
+    assert(map['type'] == 'ClassHeapStats');
+    return new ClassHeapStats(map);
+  }
+}
+
+class ClassHeapStats implements M.ClassHeapStats {
+  final S.Class clazz;
+  final S.Allocations newSpace;
+  final S.Allocations oldSpace;
+  final int promotedInstances;
+  final int promotedBytes;
+
+  ClassHeapStats(S.ServiceMap map)
+    : clazz = map['class'],
+      oldSpace = new S.Allocations()..update(map['old']),
+      newSpace = new S.Allocations()..update(map['new']),
+      promotedInstances = map['promotedInstances'],
+      promotedBytes = map['promotedBytes'];
+}