Extractor Registry¶

class ExtractorRegistry:
    """Manages extractors for different MIME types and their configurations.

    This class provides functionality to register, unregister, and retrieve
    extractors based on MIME types. It supports both synchronous and asynchronous
    operations for managing extractors. A default set of extractors is also
    maintained alongside user-registered extractors.
    """

    _default_extractors: ClassVar[list[type[Extractor]]] = [
        PDFExtractor,
        OfficeDocumentExtractor,
        PresentationExtractor,
        SpreadSheetExtractor,
        HTMLExtractor,
        MarkdownExtractor,
        ImageExtractor,
        BibliographyExtractor,
        EbookExtractor,
        LaTeXExtractor,
        MiscFormatExtractor,
        StructuredTextExtractor,
        TabularDataExtractor,
        XMLBasedExtractor,
    ]
    _registered_extractors: ClassVar[list[type[Extractor]]] = []

    @classmethod
    @lru_cache
    def get_extractor(cls, mime_type: str | None, config: ExtractionConfig) -> Extractor | None:
        """Gets the extractor for the mimetype.

        Args:
            mime_type: The mime type of the content.
            config: Extraction options object, defaults to the default object.

        Returns:
            The extractor
        """
        extractors: list[type[Extractor]] = [
            *cls._registered_extractors,
            *cls._default_extractors,
        ]
        if mime_type:
            for extractor in extractors:
                if extractor.supports_mimetype(mime_type):
                    return extractor(mime_type=mime_type, config=config)

        return None

    @classmethod
    def add_extractor(cls, extractor: type[Extractor]) -> None:
        """Add an extractor to the registry.

        Note:
            Extractors are tried in the order they are added: first added, first tried.

        Args:
            extractor: The extractor to add.

        Returns:
            None
        """
        cls._registered_extractors.append(extractor)
        cls.get_extractor.cache_clear()

    @classmethod
    def remove_extractor(cls, extractor: type[Extractor]) -> None:
        """Remove an extractor from the registry.

        Args:
            extractor: The extractor to remove.

        Returns:
            None
        """
        try:
            cls._registered_extractors.remove(extractor)
            cls.get_extractor.cache_clear()
        except ValueError:
            pass