argumentconverter.py

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#  Copyright 2008-2015 Nokia Networks
#  Copyright 2016-     Robot Framework Foundation
#
#  Licensed under the Apache License, Version 2.0 (the "License");
#  you may not use this file except in compliance with the License.
#  You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
#  Unless required by applicable law or agreed to in writing, software
#  distributed under the License is distributed on an "AS IS" BASIS,
#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#  See the License for the specific language governing permissions and
#  limitations under the License.
 
from robotide.lib.robot.utils import is_unicode
from robotide.lib.robot.variables import contains_var
 
from .typeconverters import TypeConverter
 
 
class ArgumentConverter():
 
    
    def __init__(self, argspec, dry_run=False):
        self._argspec_argspec = argspec
        self._dry_run_dry_run = dry_run
 
    def convert(self, positional, named):
        return self._convert_positional_convert_positional(positional), self._convert_named_convert_named(named)
 
    def _convert_positional(self, positional):
        names = self._argspec_argspec.positional
        converted = [self._convert_convert(name, value)
                     for name, value in zip(names, positional)]
        if self._argspec_argspec.varargs:
            converted.extend(self._convert_convert(self._argspec_argspec.varargs, value)
                             for value in positional[len(names):])
        return converted
 
    def _convert_named(self, named):
        names = set(self._argspec_argspec.positional) | set(self._argspec_argspec.kwonlyargs)
        kwargs = self._argspec_argspec.kwargs
        return [(name, self._convert_convert(name if name in names else kwargs, value))
                for name, value in named]
 
    def _convert(self, name, value):
        type_, explicit_type = self._get_type_get_type(name, value)
        if type_ is None or (self._dry_run_dry_run and
                             contains_var(value, identifiers='$@&%')):
            return value
        converter = TypeConverter.converter_for(type_)
        if converter is None:
            return value
        return converter.convert(name, value, explicit_type)
 
    def _get_type(self, name, value):
        if self._argspec_argspec.types is None or not is_unicode(value):
            return None, None
        if name in self._argspec_argspec.types:
            return self._argspec_argspec.types[name], True
        if name in self._argspec_argspec.defaults:
            return type(self._argspec_argspec.defaults[name]), False
        return None, None