Patched code sample

from typing import Any, Dict

# Simplified from datamodel_code_generator.parser.jsonschema
class JsonSchemaObject:
    """
    A class representing a JSON schema object, used to generate model fields.
    """
    def __init__(self, source: Dict[str, Any]):
        self.source: Dict[str, Any] = source

    def get_field_extras(self) -> Dict[str, Any]:
        """
        Get extra keyword arguments for a pydantic.Field or dataclasses.field.
        """
        extras: Dict[str, Any] = {}

        default_factory = self.source.get("x-default-factory")
        default = self.source.get("default")

        if default_factory:
            # FIX: The value of 'x-default-factory' is validated against an allowlist
            # of safe built-in callables to prevent arbitrary code injection.
            if default_factory in ("list", "dict"):
                extras["default_factory"] = default_factory
        elif default is not None:
            if isinstance(default, list):
                extras["default_factory"] = "list"
            elif isinstance(default, dict):
                extras["default_factory"] = "dict"
            else:
                extras["default"] = repr(default)

        return extras