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65 lines
1.6 KiB
Python
65 lines
1.6 KiB
Python
from abc import ABC, abstractmethod
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from io import BytesIO
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from pathlib import Path
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from typing import TYPE_CHECKING, Set, Union
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from docling_core.types.doc import DoclingDocument
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if TYPE_CHECKING:
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from docowling.datamodel.base_models import InputFormat
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from docowling.datamodel.document import InputDocument
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class AbstractDocumentBackend(ABC):
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@abstractmethod
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def __init__(self, in_doc: "InputDocument", path_or_stream: Union[BytesIO, Path]):
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self.file = in_doc.file
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self.path_or_stream = path_or_stream
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self.document_hash = in_doc.document_hash
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self.input_format = in_doc.format
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@abstractmethod
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def is_valid(self) -> bool:
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pass
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@classmethod
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@abstractmethod
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def supports_pagination(cls) -> bool:
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pass
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@abstractmethod
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def unload(self):
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if isinstance(self.path_or_stream, BytesIO):
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self.path_or_stream.close()
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self.path_or_stream = None
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@classmethod
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@abstractmethod
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def supported_formats(cls) -> Set["InputFormat"]:
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pass
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class PaginatedDocumentBackend(AbstractDocumentBackend):
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"""DeclarativeDocumentBackend.
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A declarative document backend is a backend that can transform to DoclingDocument
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straight without a recognition pipeline.
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"""
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@abstractmethod
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def page_count(self) -> int:
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pass
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class DeclarativeDocumentBackend(AbstractDocumentBackend):
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"""DeclarativeDocumentBackend.
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A declarative document backend is a backend that can transform to DoclingDocument
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straight without a recognition pipeline.
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"""
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@abstractmethod
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def convert(self) -> DoclingDocument:
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pass
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