schemas and validators lazy loading proxy

openapi_spec_validator/schemas/__init__.py

@@ -1,11 +1,19 @@
 """OpenAIP spec validator schemas module."""
-from openapi_spec_validator.schemas.utils import get_schema
+from functools import partial
+
+from lazy_object_proxy import Proxy
+
+from openapi_spec_validator.schemas.utils import get_schema_content
 
 __all__ = ["schema_v2", "schema_v3", "schema_v30", "schema_v31"]
 
-schema_v2, _ = get_schema("2.0")
-schema_v30, _ = get_schema("3.0")
-schema_v31, _ = get_schema("3.1")
+get_schema_content_v2 = partial(get_schema_content, "2.0")
+get_schema_content_v30 = partial(get_schema_content, "3.0")
+get_schema_content_v31 = partial(get_schema_content, "3.1")
+
+schema_v2 = Proxy(get_schema_content_v2)
+schema_v30 = Proxy(get_schema_content_v30)
+schema_v31 = Proxy(get_schema_content_v31)
 
 # alias to the latest v3 version
 schema_v3 = schema_v31

openapi_spec_validator/schemas/utils.py

@@ -15,3 +15,8 @@ def get_schema(version: str) -> Tuple[Mapping[Hashable, Any], str]:
     with importlib_resources.as_file(ref) as resource_path:
         schema_path_full = path.join(path.dirname(__file__), resource_path)
     return FilePathReader(schema_path_full).read()
+
+
+def get_schema_content(version: str) -> Mapping[Hashable, Any]:
+    content, _ = get_schema(version)
+    return content

openapi_spec_validator/validation/__init__.py

@@ -1,6 +1,9 @@
+from functools import partial
+
 from jsonschema.validators import Draft4Validator
 from jsonschema.validators import Draft202012Validator
 from jsonschema_spec.handlers import default_handlers
+from lazy_object_proxy import Proxy
 from openapi_schema_validator import oas30_format_checker
 from openapi_schema_validator import oas31_format_checker
 from openapi_schema_validator.validators import OAS30Validator
@@ -19,31 +22,40 @@
 ]
 
 # v2.0 spec
-openapi_v2_schema_validator = Draft4Validator(schema_v2)
-openapi_v2_spec_validator = SpecValidator(
+get_openapi_v2_schema_validator = partial(Draft4Validator, schema_v2)
+openapi_v2_schema_validator = Proxy(get_openapi_v2_schema_validator)
+get_openapi_v2_spec_validator = partial(
+    SpecValidator,
     openapi_v2_schema_validator,
     OAS30Validator,
     oas30_format_checker,
     resolver_handlers=default_handlers,
 )
+openapi_v2_spec_validator = Proxy(get_openapi_v2_spec_validator)
 
 # v3.0 spec
-openapi_v30_schema_validator = Draft4Validator(schema_v30)
-openapi_v30_spec_validator = SpecValidator(
+get_openapi_v30_schema_validator = partial(Draft4Validator, schema_v30)
+openapi_v30_schema_validator = Proxy(get_openapi_v30_schema_validator)
+get_openapi_v30_spec_validator = partial(
+    SpecValidator,
     openapi_v30_schema_validator,
     OAS30Validator,
     oas30_format_checker,
     resolver_handlers=default_handlers,
 )
+openapi_v30_spec_validator = Proxy(get_openapi_v30_spec_validator)
 
 # v3.1 spec
-openapi_v31_schema_validator = Draft202012Validator(schema_v31)
-openapi_v31_spec_validator = SpecValidator(
+get_openapi_v31_schema_validator = partial(Draft202012Validator, schema_v31)
+openapi_v31_schema_validator = Proxy(get_openapi_v31_schema_validator)
+get_openapi_v31_spec_validator = partial(
+    SpecValidator,
     openapi_v31_schema_validator,
     OAS31Validator,
     oas31_format_checker,
     resolver_handlers=default_handlers,
 )
+openapi_v31_spec_validator = Proxy(get_openapi_v31_spec_validator)
 
 # alias to the latest v3 version
 openapi_v3_spec_validator = openapi_v31_spec_validator

pyproject.toml

@@ -17,6 +17,10 @@ strict = true
 module = "jsonschema.*"
 ignore_missing_imports = true
 
+[[tool.mypy.overrides]]
+module = "lazy_object_proxy.*"
+ignore_missing_imports = true
+
 [tool.poetry]
 name = "openapi-spec-validator"
 version = "0.5.0a3"
@@ -47,6 +51,7 @@ PyYAML = ">=5.1"
 requests = {version = "*", optional = true}
 importlib-resources = "^5.8.0"
 jsonschema-spec = "^0.1.1"
+lazy-object-proxy = "^1.7.1"
 
 [tool.poetry.extras]
 dev = ["pre-commit"]