Refence data types

class ReferenceTable(BaseModel, frozen=True):
    """Configuration for a reference data object when table_name."""

    type: Literal["table"]
    """The object type."""
    table_name: str
    """Name of the table where the data persists."""
    database: Optional[str] = None
    """Name of the database where the reference data is located."""

    @property
    def fq_table_name(self):
        """The fully qualified table name"""
        if self.database:
            return f"{self.database}.{self.table_name}"
        return self.table_name

class ReferenceFile(BaseModel, frozen=True):
    """Configuration for a reference data object when a file."""

    type: Literal["filename"]
    """The object type."""
    filename: str
    """The path to the reference data relative to the contract."""

    @property
    def file_extension(self) -> str:
        """The file extension of the reference file"""
        return fh.get_file_suffix(self.filename)  # type: ignore

class ReferenceURI(BaseModel, frozen=True):
    """Configuration for a reference data object when a URI."""

    type: Literal["uri"]
    """The object type."""
    uri: str
    """The absolute URI of the reference data (as Parquet)."""

    @property
    def file_extension(self) -> str:
        """The file extension of the reference uri"""
        return fh.get_file_suffix(self.uri)  # type: ignore