Converted Observatory persistent-hangles-page element

runtime/observatory/lib/src/service/object.dart

 // Copyright (c) 2014, 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 service;
 
 // Some value smaller than the object ring, so requesting a large array
 // doesn't result in an expired ref because the elements lapped it in the
 // object ring.
 const int kDefaultFieldLimit = 100;
@@ skipping 1119 matching lines @@
 
 class Port implements M.Port {
   final String name;
   final HeapObject handler;
 
   Port(ServiceMap map)
     : name = map['name'],
       handler = map['handler'];
 }
 
+class PersistentHandles implements M.PersistentHandles {
+  final Iterable<PersistentHandle> elements;
+  final Iterable<WeakPersistentHandle> weakElements;
+
+  PersistentHandles(ServiceMap map)
+    : this.elements = map['persistentHandles']
+        .map((rmap) => new PersistentHandle(rmap)),
+      this.weakElements = map['weakPersistentHandles']
+          .map((rmap) => new WeakPersistentHandle(rmap));
+}
+
+class PersistentHandle implements M.PersistentHandle {
+  final HeapObject object;
+
+  PersistentHandle(ServiceMap map)
+    : object = map['object'];
+}
+
+class WeakPersistentHandle implements M.WeakPersistentHandle {
+  final int externalSize;
+  final String peer;
+  final String callbackSymbolName;
+  final String callbackAddress;
+  final HeapObject object;
+
+  WeakPersistentHandle(ServiceMap map)
+    : externalSize = int.parse(map['externalSize']),
+      peer = map['peer'],
+      callbackSymbolName = map['callbackSymbolName'],
+      callbackAddress = map['callbackAddress'],
+      object = map['object'];
+}
+
 class HeapSpace extends Observable implements M.HeapSpace {
   @observable int used = 0;
   @observable int capacity = 0;
   @observable int external = 0;
   @observable int collections = 0;
   @observable double totalCollectionTimeInSeconds = 0.0;
   @observable double averageCollectionPeriodInMillis = 0.0;
 
   Duration get avgCollectionTime {
     final mcs = totalCollectionTimeInSeconds * Duration.MICROSECONDS_PER_SECOND
@@ skipping 3145 matching lines @@
     var v = list[i];
     if ((v is ObservableMap) && _isServiceMap(v)) {
       list[i] = owner.getFromMap(v);
     } else if (v is ObservableList) {
       _upgradeObservableList(v, owner);
     } else if (v is ObservableMap) {
       _upgradeObservableMap(v, owner);
     }
   }
 }