tools/json_schema_compiler/util_cc_helper.py

   1 # Copyright (c) 2012 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 _API_UTIL_NAMESPACE = 'json_schema_compiler::util'
   6
   7
   8 class UtilCCHelper(object):
   9   """A util class that generates code that uses
  10   tools/json_schema_compiler/util.cc.
  11   """
  12   def __init__(self, type_manager):
  13     self._type_manager = type_manager
  14
  15   def PopulateArrayFromDictionary(self, array_prop, src, name, dst):
  16     """Generates code to get an array from a src.name into dst.
  17
  18     src: DictionaryValue*
  19     dst: std::vector or scoped_ptr<std::vector>
  20     """
  21     prop = array_prop.item_type
  22     sub = {
  23         'namespace': _API_UTIL_NAMESPACE,
  24         'name': name,
  25         'src': src,
  26         'dst': dst,
  27     }
  28
  29     sub['type'] = self._type_manager.GetCppType(prop),
  30     if array_prop.optional:
  31       val = ('%(namespace)s::PopulateOptionalArrayFromDictionary'
  32           '(*%(src)s, "%(name)s", &%(dst)s)')
  33     else:
  34       val = ('%(namespace)s::PopulateArrayFromDictionary'
  35           '(*%(src)s, "%(name)s", &%(dst)s)')
  36
  37     return val % sub
  38
  39   def PopulateArrayFromList(self, src, dst, optional):
  40     """Generates code to get an array from src into dst.
  41
  42     src: ListValue*
  43     dst: std::vector or scoped_ptr<std::vector>
  44     """
  45     if optional:
  46       val = '%(namespace)s::PopulateOptionalArrayFromList(*%(src)s, &%(dst)s)'
  47     else:
  48       val = '%(namespace)s::PopulateArrayFromList(*%(src)s, &%(dst)s)'
  49     return val % {
  50       'namespace': _API_UTIL_NAMESPACE,
  51       'src': src,
  52       'dst': dst
  53     }
  54
  55   def CreateValueFromArray(self, src, optional):
  56     """Generates code to create a scoped_pt<Value> from the array at src.
  57
  58     |src| The variable to convert, either a vector or scoped_ptr<vector>.
  59     |optional| Whether |type_| was optional. Optional types are pointers so
  60         must be treated differently.
  61     """
  62     if optional:
  63       name = 'CreateValueFromOptionalArray'
  64     else:
  65       name = 'CreateValueFromArray'
  66     return '%s::%s(%s)' % (_API_UTIL_NAMESPACE, name, src)
  67
  68   def GetIncludePath(self):
  69     return '#include "tools/json_schema_compiler/util.h"'
  70
  71   def GetValueTypeString(self, value, is_ptr=False):
  72     call = '.GetType()'
  73     if is_ptr:
  74       call = '->GetType()'
  75     return 'json_schema_compiler::util::ValueTypeToString(%s%s)' % (value, call)