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from collections import Iterable, OrderedDict |
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import re |
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from coalib.misc.Constants import Constants |
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from coalib.parsing.StringProcessing import unescaped_split, unescape |
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class StringConverter: |
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""" |
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Converts strings to other things as needed. If you need some kind of string |
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conversion that is not implemented here, consider adding it so everyone |
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gets something out of it. |
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""" |
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def __init__(self, |
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value, |
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strip_whitespaces=True, |
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list_delimiters=None, |
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dict_delimiter=":", |
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remove_empty_iter_elements=True): |
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if list_delimiters is None: |
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list_delimiters = [",", ";"] |
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if not isinstance(list_delimiters, Iterable): |
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raise TypeError("list_delimiters has to be an Iterable.") |
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if not isinstance(strip_whitespaces, bool): |
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raise TypeError("strip_whitespaces has to be a bool parameter") |
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self.__strip_whitespaces = strip_whitespaces |
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self.__list_delimiters = list_delimiters |
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self.__dict_delimiter = dict_delimiter |
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self.__remove_empty_iter_elements = remove_empty_iter_elements |
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self.__escaped_list = None |
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self.__unescaped_list = None |
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self.__dict = None |
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self.value = value |
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def __str__(self): |
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return unescape(self.value) |
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def __bool__(self): |
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if str(self).lower() in Constants.TRUE_STRINGS: |
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return True |
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if str(self).lower() in Constants.FALSE_STRINGS: |
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return False |
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raise ValueError |
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def __len__(self): |
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return len(str(self)) |
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def __int__(self): |
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return int(str(self)) |
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def __float__(self): |
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return float(str(self)) |
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def __iter__(self, remove_backslashes=True): |
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""" |
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Converts the value to a list using the delimiters given at construction |
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time. |
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Note that escaped values will be unescaped and escaped list delimiters |
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will be allowed in values. If you need the escapes you should not |
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use this routine. |
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:param remove_backslashes: Whether or not to remove the backslashes |
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after conversion. |
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:return: An iterator over all values. |
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""" |
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if remove_backslashes: |
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return iter(self.__unescaped_list) |
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else: |
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return iter(self.__escaped_list) |
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def __getitem__(self, item): |
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return self.__dict.__getitem__(item) |
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def keys(self): |
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return self.__dict.keys() |
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def __get_raw_list(self): |
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pattern = ("(?:" + |
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"|".join(re.escape(v) for v in self.__list_delimiters) + |
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")") |
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return list(unescaped_split(pattern, |
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self.value, |
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use_regex=True)) |
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def __prepare_list(self): |
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self.__escaped_list = self.__get_raw_list() |
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self.__unescaped_list = [unescape(elem) |
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for elem in self.__escaped_list] |
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if self.__strip_whitespaces: |
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self.__unescaped_list = [elem.strip() |
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for elem in self.__unescaped_list] |
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self.__escaped_list = [elem.strip() |
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for elem in self.__escaped_list] |
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if self.__remove_empty_iter_elements: |
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# Need to do after stripping, cant use builtin functionality of |
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# split. |
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while "" in self.__unescaped_list: |
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self.__unescaped_list.remove("") |
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while "" in self.__escaped_list: |
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self.__escaped_list.remove("") |
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def __prepare_dict(self): |
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# We must keep order here, user can drop it later. |
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self.__dict = OrderedDict() |
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for elem in self.__get_raw_list(): |
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key_val = [unescape(item) |
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for item in unescaped_split(self.__dict_delimiter, |
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elem, |
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max_split=1)] |
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if self.__strip_whitespaces: |
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key_val = [item.strip() for item in key_val] |
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if not any(item != "" for item in key_val): |
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continue |
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if len(key_val) < 2: |
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self.__dict[key_val[0]] = "" |
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else: |
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self.__dict[key_val[0]] = key_val[1] |
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@property |
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def value(self): |
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return self.__value |
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@value.setter |
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def value(self, newval): |
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self.__value = str(newval) |
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if self.__strip_whitespaces: |
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self.__value = self.__value.strip() |
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self.__prepare_list() |
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self.__prepare_dict() |
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def __eq__(self, other): |
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return isinstance(other, StringConverter) and self.value == other.value |
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def __ne__(self, other): |
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return not self.__eq__(other) |
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coala-analyzer /
coala
