def testIsEmpty(self):
c = Code()
self.assertTrue(c.IsEmpty())
c.Append('asdf')
self.assertFalse(c.IsEmpty())
def _GeneratePopulateVariableFromValue(self,
type_,
src_var,
dst_var,
failure_value,
is_ptr=False):
"""Generates code to populate a variable |dst_var| of type |type_| from a
Value* at |src_var|. The Value* is assumed to be non-NULL. In the generated
code, if |dst_var| fails to be populated then Populate will return
|failure_value|.
"""
c = Code()
underlying_type = self._type_helper.FollowRef(type_)
if underlying_type.property_type.is_fundamental:
if is_ptr:
(c.Append('%(cpp_type)s temp;')
.Sblock('if (!%s) {' % cpp_util.GetAsFundamentalValue(
self._type_helper.FollowRef(type_), src_var, '&temp'))
.Concat(self._GenerateError(
'"\'%%(key)s\': expected ' + '%s, got " + %s' % (
type_.name,
self._util_cc_helper.GetValueTypeString(
'%%(src_var)s', True)))))
c.Append('%(dst_var)s.reset();')
if not self._generate_error_messages:
c.Append('return %(failure_value)s;')
(c.Eblock('}')
.Append('else')
.Append(' %(dst_var)s.reset(new %(cpp_type)s(temp));')
)
else:
(c.Sblock('if (!%s) {' % cpp_util.GetAsFundamentalValue(
self._type_helper.FollowRef(type_),
src_var,
'&%s' % dst_var))
.Concat(self._GenerateError(
'"\'%%(key)s\': expected ' + '%s, got " + %s' % (
type_.name,
self._util_cc_helper.GetValueTypeString(
'%%(src_var)s', True))))
.Append('return %(failure_value)s;')
.Eblock('}')
)
elif underlying_type.property_type == PropertyType.OBJECT:
if is_ptr:
(c.Append('const base::DictionaryValue* dictionary = NULL;')
.Sblock('if (!%(src_var)s->GetAsDictionary(&dictionary)) {')
.Concat(self._GenerateError(
'"\'%%(key)s\': expected dictionary, got " + ' +
self._util_cc_helper.GetValueTypeString('%%(src_var)s', True))))
# If an optional property fails to populate, the population can still
# succeed with a warning. If no error messages are generated, this
# warning is not set and we fail out instead.
if not self._generate_error_messages:
c.Append('return %(failure_value)s;')
(c.Eblock('}')
.Sblock('else {')
.Append('scoped_ptr<%(cpp_type)s> temp(new %(cpp_type)s());')
.Append('if (!%%(cpp_type)s::Populate(%s)) {' % self._GenerateArgs(
('*dictionary', 'temp.get()')))
.Append(' return %(failure_value)s;')
)
(c.Append('}')
.Append('else')
.Append(' %(dst_var)s = temp.Pass();')
.Eblock('}')
)
else:
(c.Append('const base::DictionaryValue* dictionary = NULL;')
.Sblock('if (!%(src_var)s->GetAsDictionary(&dictionary)) {')
.Concat(self._GenerateError(
'"\'%%(key)s\': expected dictionary, got " + ' +
self._util_cc_helper.GetValueTypeString('%%(src_var)s', True)))
.Append('return %(failure_value)s;')
.Eblock('}')
.Append('if (!%%(cpp_type)s::Populate(%s)) {' % self._GenerateArgs(
('*dictionary', '&%(dst_var)s')))
.Append(' return %(failure_value)s;')
.Append('}')
)
elif underlying_type.property_type == PropertyType.FUNCTION:
if is_ptr:
c.Append('%(dst_var)s.reset(new base::DictionaryValue());')
elif underlying_type.property_type == PropertyType.ANY:
c.Append('%(dst_var)s.reset(%(src_var)s->DeepCopy());')
elif underlying_type.property_type == PropertyType.ARRAY:
# util_cc_helper deals with optional and required arrays
(c.Append('const base::ListValue* list = NULL;')
.Sblock('if (!%(src_var)s->GetAsList(&list)) {')
.Concat(self._GenerateError(
'"\'%%(key)s\': expected list, got " + ' +
self._util_cc_helper.GetValueTypeString('%%(src_var)s', True)))
)
if is_ptr and self._generate_error_messages:
c.Append('%(dst_var)s.reset();')
else:
c.Append('return %(failure_value)s;')
c.Eblock('}')
c.Sblock('else {')
item_type = self._type_helper.FollowRef(underlying_type.item_type)
if item_type.property_type == PropertyType.ENUM:
c.Concat(self._GenerateListValueToEnumArrayConversion(
item_type,
'list',
dst_var,
failure_value,
is_ptr=is_ptr))
else:
c.Sblock('if (!%s(%s)) {' % (
self._util_cc_helper.PopulateArrayFromListFunction(is_ptr),
self._GenerateArgs(('*list', '&%(dst_var)s'))))
c.Concat(self._GenerateError(
'"unable to populate array \'%%(parent_key)s\'"'))
if is_ptr and self._generate_error_messages:
c.Append('%(dst_var)s.reset();')
else:
c.Append('return %(failure_value)s;')
c.Eblock('}')
c.Eblock('}')
elif underlying_type.property_type == PropertyType.CHOICES:
if is_ptr:
(c.Append('scoped_ptr<%(cpp_type)s> temp(new %(cpp_type)s());')
.Append('if (!%%(cpp_type)s::Populate(%s))' % self._GenerateArgs(
('*%(src_var)s', 'temp.get()')))
.Append(' return %(failure_value)s;')
.Append('%(dst_var)s = temp.Pass();')
)
else:
(c.Append('if (!%%(cpp_type)s::Populate(%s))' % self._GenerateArgs(
('*%(src_var)s', '&%(dst_var)s')))
.Append(' return %(failure_value)s;'))
elif underlying_type.property_type == PropertyType.ENUM:
c.Concat(self._GenerateStringToEnumConversion(underlying_type,
src_var,
dst_var,
failure_value))
elif underlying_type.property_type == PropertyType.BINARY:
(c.Append('const base::BinaryValue* binary_value = NULL;')
.Sblock('if (!%(src_var)s->IsType(base::Value::TYPE_BINARY)) {')
.Concat(self._GenerateError(
'"\'%%(key)s\': expected binary, got " + ' +
self._util_cc_helper.GetValueTypeString('%%(src_var)s', True)))
)
if not self._generate_error_messages:
c.Append('return %(failure_value)s;')
(c.Eblock('}')
.Sblock('else {')
.Append(' binary_value =')
.Append(' static_cast<const base::BinaryValue*>(%(src_var)s);')
)
if is_ptr:
(c.Append('%(dst_var)s.reset(new std::vector<char>(')
.Append(' binary_value->GetBuffer(),')
.Append(' binary_value->GetBuffer() + binary_value->GetSize()));')
)
else:
(c.Append('%(dst_var)s.assign(')
.Append(' binary_value->GetBuffer(),')
.Append(' binary_value->GetBuffer() + binary_value->GetSize());')
)
c.Eblock('}')
else:
raise NotImplementedError(type_)
if c.IsEmpty():
return c
return Code().Sblock('{').Concat(c.Substitute({
'cpp_type': self._type_helper.GetCppType(type_),
'src_var': src_var,
'dst_var': dst_var,
'failure_value': failure_value,
'key': type_.name,
'parent_key': type_.parent.name,
})).Eblock('}')