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