Added getField/setField to ObjectMirror. For InstanceMirrors, this get/sets

runtime/lib/mirrors_impl.dart

 // Copyright (c) 2012, 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.
 
 // VM-specific implementation of the dart:mirrors library.
 
 // These values are allowed to be passed directly over the wire.
 bool isSimpleValue(var value) {
   return (value === null || value is num || value is String || value is bool);
 }
@@ skipping 87 matching lines @@
 
   Future<InstanceMirror> invoke(String memberName,
                                 List positionalArguments,
                                 [Map<String,Dynamic> namedArguments]) {
     if (namedArguments !== null) {
       throw new NotImplementedException('named arguments not implemented');
     }
     // Walk the arguments and make sure they are legal.
     for (int i = 0; i < positionalArguments.length; i++) {
       var arg = positionalArguments[i];
-      if (arg is Mirror) {
-        if (arg is! InstanceMirror) {
-          throw new MirrorException(
-              'positional argument $i ($arg) was not an InstanceMirror');
-        }
-      } else if (!isSimpleValue(arg)) {
-        throw new MirrorException(
-            'positional argument $i ($arg) was not a simple value');
-      }
+      _validateArgument(i, arg);
     }
     Completer<InstanceMirror> completer = new Completer<InstanceMirror>();
     try {
       completer.complete(
           _invoke(this, memberName, positionalArguments));
     } catch (var exception) {
       completer.completeException(exception);
     }
     return completer.future;
   }
 
+  Future<InstanceMirror> getField(String fieldName)
+  {
+    Completer<InstanceMirror> completer = new Completer<InstanceMirror>();
+    try {
+      completer.complete(_getField(this, fieldName));
+    } catch (var exception) {
+      completer.completeException(exception);
+    }
+    return completer.future;
+  }
+
+  Future<InstanceMirror> setField(String fieldName, Object arg)
+  {
+    _validateArgument(0, arg);
+
+    Completer<InstanceMirror> completer = new Completer<InstanceMirror>();
+    try {
+      completer.complete(_setField(this, fieldName, arg));
+    } catch (var exception) {
+      completer.completeException(exception);
+    }
+    return completer.future;
+  }
+
+  static _validateArgument(int i, Object arg)
+  {
+    if (arg is Mirror) {
+        if (arg is! InstanceMirror) {
+          throw new MirrorException(
+              'positional argument $i ($arg) was not an InstanceMirror');
+        }
+      } else if (!isSimpleValue(arg)) {
+        throw new MirrorException(
+            'positional argument $i ($arg) was not a simple value');
+      }
+  }
+
   static _invoke(ref, memberName, positionalArguments)
       native 'LocalObjectMirrorImpl_invoke';
+
+  static _getField(ref, fieldName)
+      native 'LocalObjectMirrorImpl_getField';
+
+  static _setField(ref, fieldName, value)
+      native 'LocalObjectMirrorImpl_setField';
 }
 
 // Prints a string as it might appear in dart program text.
 // TODO(turnidge): Consider truncating.
 String _dartEscape(String str) {
   bool isNice(int code) {
     return (code >= 32 && code <= 126);
   }
 
   StringBuffer buf = new StringBuffer();
@@ skipping 357 matching lines @@
 
   // Creates a new local InstanceMirror
   static InstanceMirror makeLocalInstanceMirror(Object reflectee)
       native 'Mirrors_makeLocalInstanceMirror';
 
   // Creates a new local mirror for some Object.
   static InstanceMirror mirrorOf(Object reflectee) {
     return makeLocalInstanceMirror(reflectee);
   }
 }