Merge pull request #32 from fredsonnenwald/add-null

Add null type parser

jambo/parser/__init__.py

@@ -7,6 +7,7 @@ from .const_type_parser import ConstTypeParser
 from .enum_type_parser import EnumTypeParser
 from .float_type_parser import FloatTypeParser
 from .int_type_parser import IntTypeParser
+from .null_type_parser import NullTypeParser
 from .object_type_parser import ObjectTypeParser
 from .ref_type_parser import RefTypeParser
 from .string_type_parser import StringTypeParser
@@ -22,6 +23,7 @@ __all__ = [
     "BooleanTypeParser",
     "FloatTypeParser",
     "IntTypeParser",
+    "NullTypeParser",
     "ObjectTypeParser",
     "StringTypeParser",
     "RefTypeParser",

jambo/parser/null_type_parser.py

@@ -0,0 +1,18 @@
+from jambo.parser._type_parser import GenericTypeParser
+from jambo.types.type_parser_options import TypeParserOptions
+
+from typing_extensions import Unpack
+
+
+class NullTypeParser(GenericTypeParser):
+    mapped_type = type(None)
+
+    json_schema_type = "type:null"
+
+    def from_properties_impl(
+        self, name, properties, **kwargs: Unpack[TypeParserOptions]
+    ):
+        mapped_properties = self.mappings_properties_builder(properties, **kwargs)
+        mapped_properties["default"] = None
+
+        return self.mapped_type, mapped_properties