feat: add doc metadata extractor and ID generator classes

Signed-off-by: Panos Vagenas <35837085+vagenas@users.noreply.github.com>

docling_core/transforms/id_generator/__init__.py

@@ -0,0 +1,12 @@
+#
+# Copyright IBM Corp. 2024 - 2024
+# SPDX-License-Identifier: MIT
+#
+
+"""Define the ID generator types."""
+
+from docling_core.transforms.id_generator.base import BaseIDGenerator  # noqa
+from docling_core.transforms.id_generator.doc_hash_id_generator import (  # noqa
+    DocHashIDGenerator,
+)
+from docling_core.transforms.id_generator.uuid_generator import UUIDGenerator  # noqa

docling_core/transforms/id_generator/base.py

@@ -0,0 +1,30 @@
+#
+# Copyright IBM Corp. 2024 - 2024
+# SPDX-License-Identifier: MIT
+#
+
+"""Base document ID generator module."""
+
+from abc import ABC, abstractmethod
+from typing import Any
+
+from docling_core.types import Document as DLDocument
+
+
+class BaseIDGenerator(ABC):
+    """Document ID generator base class."""
+
+    @abstractmethod
+    def generate_id(self, doc: DLDocument, *args: Any, **kwargs: Any) -> str:
+        """Generate an ID for the given document.
+
+        Args:
+            doc (DLDocument): document to generate ID for
+
+        Raises:
+            NotImplementedError: in this abstract implementation
+
+        Returns:
+            str: the generated ID
+        """
+        raise NotImplementedError()

docling_core/transforms/id_generator/doc_hash_id_generator.py

@@ -0,0 +1,27 @@
+#
+# Copyright IBM Corp. 2024 - 2024
+# SPDX-License-Identifier: MIT
+#
+
+"""Doc-hash-based ID generator module."""
+
+
+from typing import Any
+
+from docling_core.transforms.id_generator import BaseIDGenerator
+from docling_core.types import Document as DLDocument
+
+
+class DocHashIDGenerator(BaseIDGenerator):
+    """Doc-hash-based ID generator class."""
+
+    def generate_id(self, doc: DLDocument, *args: Any, **kwargs: Any) -> str:
+        """Generate an ID for the given document.
+
+        Args:
+            doc (DLDocument): document to generate ID for
+
+        Returns:
+            str: the generated ID
+        """
+        return doc.file_info.document_hash

docling_core/transforms/id_generator/uuid_generator.py

@@ -0,0 +1,34 @@
+#
+# Copyright IBM Corp. 2024 - 2024
+# SPDX-License-Identifier: MIT
+#
+
+"""UUID-based ID generator module."""
+
+from random import Random
+from typing import Annotated, Any, Optional
+from uuid import UUID
+
+from pydantic import BaseModel, Field
+
+from docling_core.transforms.id_generator import BaseIDGenerator
+from docling_core.types import Document as DLDocument
+
+
+class UUIDGenerator(BaseModel, BaseIDGenerator):
+    """UUID-based ID generator class."""
+
+    seed: Optional[int] = None
+    uuid_version: Annotated[int, Field(strict=True, ge=1, le=5)] = 4
+
+    def generate_id(self, doc: DLDocument, *args: Any, **kwargs: Any) -> str:
+        """Generate an ID for the given document.
+
+        Args:
+            doc (DLDocument): document to generate ID for
+
+        Returns:
+            str: the generated ID
+        """
+        rd = Random(x=self.seed)
+        return str(UUID(int=rd.getrandbits(128), version=self.uuid_version))

docling_core/transforms/metadata_extractor/__init__.py

@@ -0,0 +1,13 @@
+#
+# Copyright IBM Corp. 2024 - 2024
+# SPDX-License-Identifier: MIT
+#
+
+"""Define the metadata extractor types."""
+
+from docling_core.transforms.metadata_extractor.base import (  # noqa
+    BaseMetadataExtractor,
+)
+from docling_core.transforms.metadata_extractor.simple_metadata_extractor import (  # noqa
+    SimpleMetadataExtractor,
+)

docling_core/transforms/metadata_extractor/base.py

@@ -0,0 +1,59 @@
+#
+# Copyright IBM Corp. 2024 - 2024
+# SPDX-License-Identifier: MIT
+#
+
+"""Base metadata extractor module."""
+
+
+from abc import ABC, abstractmethod
+from typing import Any
+
+from pydantic import BaseModel
+
+from docling_core.types import Document as DLDocument
+
+
+class BaseMetadataExtractor(BaseModel, ABC):
+    """Metadata extractor base class."""
+
+    @abstractmethod
+    def get_metadata(
+        self, doc: DLDocument, *args: Any, **kwargs: Any
+    ) -> dict[str, Any]:
+        """Extract metadata for the given document.
+
+        Args:
+            doc (DLDocument): document to extract metadata for
+
+        Raises:
+            NotImplementedError: in this abstract implementation
+
+        Returns:
+            dict[str, Any]: the extracted metadata
+        """
+        raise NotImplementedError()
+
+    @abstractmethod
+    def get_excluded_embed_metadata_keys(self) -> list[str]:
+        """Get metadata keys to exclude from embedding.
+
+        Raises:
+            NotImplementedError: in this abstract implementation
+
+        Returns:
+            list[str]: the metadata to exclude
+        """
+        raise NotImplementedError()
+
+    @abstractmethod
+    def get_excluded_llm_metadata_keys(self) -> list[str]:
+        """Get metadata keys to exclude from LLM generation.
+
+        Raises:
+            NotImplementedError: in this abstract implementation
+
+        Returns:
+            list[str]: the metadata to exclude
+        """
+        raise NotImplementedError()

docling_core/transforms/metadata_extractor/simple_metadata_extractor.py

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+#
+# Copyright IBM Corp. 2024 - 2024
+# SPDX-License-Identifier: MIT
+#
+
+"""Simple metadata extractor module."""
+
+
+from enum import Enum
+from typing import Any
+
+from docling_core.transforms.metadata_extractor import BaseMetadataExtractor
+from docling_core.types import Document as DLDocument
+
+
+class SimpleMetadataExtractor(BaseMetadataExtractor):
+    """Simple metadata extractor class."""
+
+    class _Keys(str, Enum):
+        DL_DOC_HASH = "dl_doc_hash"
+        ORIGIN = "origin"
+
+    include_origin: bool = False
+
+    def get_metadata(
+        self, doc: DLDocument, origin: str, *args: Any, **kwargs: Any
+    ) -> dict[str, Any]:
+        """Extract metadata for the given document.
+
+        Args:
+            doc (DLDocument): document to extract metadata for
+            origin (str): the document origin
+
+        Returns:
+            dict[str, Any]: the extracted metadata
+        """
+        meta: dict[str, Any] = {
+            self._Keys.DL_DOC_HASH: doc.file_info.document_hash,
+        }
+        if self.include_origin:
+            meta[self._Keys.ORIGIN] = origin
+        return meta
+
+    def get_excluded_embed_metadata_keys(self) -> list[str]:
+        """Get metadata keys to exclude from embedding.
+
+        Returns:
+            list[str]: the metadata to exclude
+        """
+        excl_keys: list[str] = [self._Keys.DL_DOC_HASH]
+        if self.include_origin:
+            excl_keys.append(self._Keys.ORIGIN)
+        return excl_keys
+
+    def get_excluded_llm_metadata_keys(self) -> list[str]:
+        """Get metadata keys to exclude from LLM generation.
+
+        Returns:
+            list[str]: the metadata to exclude
+        """
+        return self.get_excluded_embed_metadata_keys()