| // Copyright (C) 2012 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 com.google.gerrit.client.rpc; |
| |
| import com.google.gwt.core.client.JavaScriptObject; |
| import com.google.gwt.json.client.JSONObject; |
| |
| import java.util.Collections; |
| import java.util.Set; |
| |
| public class Natives { |
| /** |
| * Get the names of defined properties on the object. The returned set |
| * iterates in the native iteration order, which may match the source order. |
| */ |
| public static Set<String> keys(JavaScriptObject obj) { |
| if (obj != null) { |
| return new JSONObject(obj).keySet(); |
| } |
| return Collections.emptySet(); |
| } |
| |
| public static <T extends JavaScriptObject> T parseJSON(String json) { |
| if (parser == null) { |
| parser = bestJsonParser(); |
| } |
| // javac generics bug |
| return Natives.<T>parse0(parser, json); |
| } |
| |
| private static native <T extends JavaScriptObject> |
| T parse0(JavaScriptObject p, String s) |
| /*-{ return p(s); }-*/; |
| |
| private static JavaScriptObject parser; |
| private static native JavaScriptObject bestJsonParser() |
| /*-{ |
| if ($wnd.JSON && typeof $wnd.JSON.parse === 'function') |
| return $wnd.JSON.parse; |
| return function(s) { return eval('(' + s + ')'); }; |
| }-*/; |
| |
| private Natives() { |
| } |
| } |