class ProjectFile {
    private final TestFile file
    final NSDictionary content
    private Map<String, NSObject> objects
    private PBXObject rootObject

    ProjectFile(TestFile pbxProjectFile) {
        pbxProjectFile.assertIsFile()
        file = pbxProjectFile
        content = PropertyListParser.parse(file)
        objects = ((NSDictionary)content.get("objects")).getHashMap()

        XcodeprojSerializer serializer = new XcodeprojSerializer(gidGenerator, project);
        final NSDictionary rootObject = serializer.toPlist();

        projectFile.transformAction(new Action<NSDictionary>() {
            @Override
            public void execute(NSDictionary dict) {
                dict.clear();
                dict.putAll(rootObject);
            }
        });
    }