feat: better exceptions for GenericTypeParser and AllOfTypeParser

jambo/parser/_type_parser.py

@@ -1,3 +1,4 @@
+from jambo.exceptions import InvalidSchemaException
 from jambo.types.type_parser_options import JSONSchema, TypeParserOptions
 
 from pydantic import Field, TypeAdapter
@@ -46,8 +47,8 @@ class GenericTypeParser(ABC, Generic[T]):
         )
 
         if not self._validate_default(parsed_type, parsed_properties):
-            raise ValueError(
-                f"Default value {properties.get('default')} is not valid for type {parsed_type.__name__}"
+            raise InvalidSchemaException(
+                "Default value is not valid", invalid_field=name
             )
 
         return parsed_type, parsed_properties
@@ -79,7 +80,9 @@ class GenericTypeParser(ABC, Generic[T]):
             if schema_value is None or schema_value == properties[schema_type]:  # type: ignore
                 return subcls
 
-        raise ValueError("Unknown type")
+        raise InvalidSchemaException(
+            "No suitable type parser found", invalid_field=str(properties)
+        )
 
     @classmethod
     def _get_schema_type(cls) -> tuple[str, str | None]:

jambo/parser/allof_type_parser.py

@@ -1,3 +1,4 @@
+from jambo.exceptions import InvalidSchemaException
 from jambo.parser._type_parser import GenericTypeParser
 from jambo.types.json_schema_type import JSONSchema
 from jambo.types.type_parser_options import TypeParserOptions
@@ -33,13 +34,18 @@ class AllOfTypeParser(GenericTypeParser):
         sub_properties: list[JSONSchema],
     ) -> type[GenericTypeParser]:
         if not sub_properties:
-            raise ValueError("Invalid JSON Schema: 'allOf' is empty.")
+            raise InvalidSchemaException(
+                "'allOf' must contain at least one schema", invalid_field="allOf"
+            )
 
         parsers: set[type[GenericTypeParser]] = set(
             GenericTypeParser._get_impl(sub_property) for sub_property in sub_properties
         )
         if len(parsers) != 1:
-            raise ValueError("Invalid JSON Schema: allOf types do not match.")
+            raise InvalidSchemaException(
+                "All sub-schemas in 'allOf' must resolve to the same type",
+                invalid_field="allOf",
+            )
 
         return parsers.pop()
 
@@ -68,8 +74,8 @@ class AllOfTypeParser(GenericTypeParser):
 
         if prop_name == "default":
             if old_value != new_value:
-                raise ValueError(
-                    f"Invalid JSON Schema: conflicting defaults for '{prop_name}'"
+                raise InvalidSchemaException(
+                    f"Conflicting defaults for '{prop_name}'", invalid_field=prop_name
                 )
             return old_value