build/android/pylib/content_settings.py

   1 # Copyright 2014 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.
   4
   5 from pylib import constants
   6
   7
   8 class ContentSettings(dict):
   9
  10   """A dict interface to interact with device content settings.
  11
  12   System properties are key/value pairs as exposed by adb shell content.
  13   """
  14
  15   def __init__(self, table, device):
  16     super(ContentSettings, self).__init__()
  17     assert (device.build_version_sdk
  18             >= constants.ANDROID_SDK_VERSION_CODES.JELLY_BEAN), (
  19         'ContentSettings supported only on SDK 16 and later')
  20     self._table = table
  21     self._device = device
  22
  23   @staticmethod
  24   def _GetTypeBinding(value):
  25     if isinstance(value, bool):
  26       return 'b'
  27     if isinstance(value, float):
  28       return 'f'
  29     if isinstance(value, int):
  30       return 'i'
  31     if isinstance(value, long):
  32       return 'l'
  33     if isinstance(value, str):
  34       return 's'
  35     raise ValueError('Unsupported type %s' % type(value))
  36
  37   def iteritems(self):
  38     # Example row:
  39     # 'Row: 0 _id=13, name=logging_id2, value=-1fccbaa546705b05'
  40     for row in self._device.RunShellCommand(
  41         'content query --uri content://%s' % self._table, as_root=True):
  42       fields = row.split(', ')
  43       key = None
  44       value = None
  45       for field in fields:
  46         k, _, v = field.partition('=')
  47         if k == 'name':
  48           key = v
  49         elif k == 'value':
  50           value = v
  51       if not key:
  52         continue
  53       if not value:
  54         value = ''
  55       yield key, value
  56
  57   def __getitem__(self, key):
  58     return self._device.RunShellCommand(
  59         'content query --uri content://%s --where "name=\'%s\'" '
  60         '--projection value' % (self._table, key), as_root=True).strip()
  61
  62   def __setitem__(self, key, value):
  63     if key in self:
  64       self._device.RunShellCommand(
  65           'content update --uri content://%s '
  66           '--bind value:%s:%s --where "name=\'%s\'"' % (
  67               self._table,
  68               self._GetTypeBinding(value), value, key),
  69           as_root=True)
  70     else:
  71       self._device.RunShellCommand(
  72           'content insert --uri content://%s '
  73           '--bind name:%s:%s --bind value:%s:%s' % (
  74               self._table,
  75               self._GetTypeBinding(key), key,
  76               self._GetTypeBinding(value), value),
  77           as_root=True)
  78
  79   def __delitem__(self, key):
  80     self._device.RunShellCommand(
  81         'content delete --uri content://%s '
  82         '--bind name:%s:%s' % (
  83             self._table,
  84             self._GetTypeBinding(key), key),
  85         as_root=True)