--- /dev/null
+// Copyright (c) 2011 Google, Inc.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+/**
+ * @fileoverview A general purpose object proxy that logs all method calls.
+ *
+ * @author konigsberg@google.com (Robert Konigsberg)
+ */
+
+var Proxy = function(delegate) {
+ this.delegate__ = delegate;
+ this.calls__ = [];
+ this.propertiesToTrack__ = [];
+
+ for (var propname in delegate) {
+ var type = typeof(delegate[propname]);
+
+ // Functions are passed through to the delegate, and are logged
+ // prior to the call.
+ if (type == "function") {
+ function makeFunc(name) {
+ return function() {
+ this.log__(name, arguments);
+ this.delegate__[name].apply(this.delegate__, arguments);
+ }
+ };
+ this[propname] = makeFunc(propname);
+ } else if (type == "string" || type == "number") {
+ // String and number properties are just passed through to the delegate.
+ this.propertiesToTrack__.push(propname);
+ function makeSetter(name) {
+ return function(x) {
+ this.delegate__[name] = x;
+ }
+ };
+ this.__defineSetter__(propname, makeSetter(propname));
+
+ function makeGetter(name) {
+ return function() {
+ return this.delegate__[name];
+ }
+ };
+ this.__defineGetter__(propname, makeGetter(propname));
+ }
+ }
+};
+
+Proxy.prototype.log__ = function(name, args) {
+ var properties = {};
+ for (var propIdx in this.propertiesToTrack__) {
+ var prop = this.propertiesToTrack__[propIdx];
+ properties[prop] = this.delegate__[prop];
+ }
+ var call = { name : name, args : args, properties: properties };
+ this.calls__.push(call);
+};
+