Source code for typedargs.types.list

# This file is adapted from python code released by WellDone International
# under the terms of the LGPLv3.  WellDone International's contact information is
# info@welldone.org
# http://welldone.org
#
# Modifications to this file from the original created at WellDone International
# are copyright Arch Systems Inc.

# pylint: disable=unused-argument,missing-docstring

# list.py

import ast
import collections
from typing import List


class list:  # pylint: disable=C0103
    MAPPED_COMPLEX_TYPE = List

    def __init__(self, valuetype, **kwargs):

        self.valuetype = valuetype
        self.type_system = kwargs['type_system']

    @staticmethod
    def Build(*types, **kwargs):
        if len(types) != 1:
            raise ValueError("list must be created with 1 argument, a value type")

        return list(types[0], **kwargs)

    def convert(self, value, **kwargs):
        if value is None:
            return value

        converted = []
        if isinstance(value, str):
            old_value = value
            value = ast.literal_eval(value)
            if not isinstance(value, collections.abc.Sequence):
                raise ValueError("converted list from a string but it did not produce a sequence: %s" % old_value)

        for val in value:
            conv = self.type_system.convert_to_type(val, self.valuetype, **kwargs)
            converted.append(conv)

        return converted

    def default_formatter(self, value, **kwargs):
        lines = []
        for val in value:
            line = self.type_system.format_value(val, self.valuetype, **kwargs)
            lines.append(line)

        return "\n".join(lines)

    def format_compact(self, value, **kwargs):
        lines = []
        for val in value:
            line = self.type_system.format_value(val, self.valuetype, **kwargs)
            lines.append(line)

        return "[" + ", ".join(lines) + "]"