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     self._table = table
  18     self._device = device
  19
  20   @staticmethod
  21   def _GetTypeBinding(value):
  22     if isinstance(value, bool):
  23       return 'b'
  24     if isinstance(value, float):
  25       return 'f'
  26     if isinstance(value, int):
  27       return 'i'
  28     if isinstance(value, long):
  29       return 'l'
  30     if isinstance(value, str):
  31       return 's'
  32     raise ValueError('Unsupported type %s' % type(value))
  33
  34   def iteritems(self):
  35     # Example row:
  36     # 'Row: 0 _id=13, name=logging_id2, value=-1fccbaa546705b05'
  37     for row in self._device.RunShellCommand(
  38         'content query --uri content://%s' % self._table, as_root=True):
  39       fields = row.split(', ')
  40       key = None
  41       value = None
  42       for field in fields:
  43         k, _, v = field.partition('=')
  44         if k == 'name':
  45           key = v
  46         elif k == 'value':
  47           value = v
  48       if not key:
  49         continue
  50       if not value:
  51         value = ''
  52       yield key, value
  53
  54   def __getitem__(self, key):
  55     return self._device.RunShellCommand(
  56         'content query --uri content://%s --where "name=\'%s\'" '
  57         '--projection value' % (self._table, key), as_root=True).strip()
  58
  59   def __setitem__(self, key, value):
  60     if key in self:
  61       self._device.RunShellCommand(
  62           'content update --uri content://%s '
  63           '--bind value:%s:%s --where "name=\'%s\'"' % (
  64               self._table,
  65               self._GetTypeBinding(value), value, key),
  66           as_root=True)
  67     else:
  68       self._device.RunShellCommand(
  69           'content insert --uri content://%s '
  70           '--bind name:%s:%s --bind value:%s:%s' % (
  71               self._table,
  72               self._GetTypeBinding(key), key,
  73               self._GetTypeBinding(value), value),
  74           as_root=True)
  75
  76   def __delitem__(self, key):
  77     self._device.RunShellCommand(
  78         'content delete --uri content://%s '
  79         '--bind name:%s:%s' % (
  80             self._table,
  81             self._GetTypeBinding(key), key),
  82         as_root=True)