1# Copyright (c) 2015 The Chromium Authors. All rights reserved.
2# Use of this source code is governed by a BSD-style license that can be
3# found in the LICENSE file.
4import json
5
6from tracing.mre import output_formatter
7
8
9class JSONOutputFormatter(output_formatter.OutputFormatter):
10
11  def __init__(self, output_file):
12    # TODO(nduca): Resolve output_file here vs output_stream in base class.
13    super(JSONOutputFormatter, self).__init__(output_file)
14    self.output_file = output_file
15
16  def Format(self, result_list):
17    d = [result.AsDict() for result in result_list]
18    json.dump(d, self.output_file, indent=2)
19    if hasattr(self.output_file, 'flush'):
20      self.output_file.flush()
21