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from copy import deepcopy |
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from typing import Any, Dict |
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import json |
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from omi.base import get_metadata_specification |
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from omi.validation import validate_metadata # parse_metadata |
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from sqlalchemy.engine import Engine |
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from egon.data.metadata import settings |
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class OEMetadataPackage: |
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def __init__(self, version: str = settings.OEMETADATA_VERSION) -> None: |
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self.spec = get_metadata_specification(version) |
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self._doc: Dict[str, Any] = { |
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"@context": self.spec.example["@context"], |
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"name": "", |
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"title": "", |
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"description": "", |
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"@id": "", |
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"resources": [], |
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"metaMetadata": self.spec.example["metaMetadata"], |
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} |
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self._validated = False |
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def set_root( |
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self, |
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*, |
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name: str, |
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title: str = "", |
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description: str = "", |
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id_: str = "", |
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) -> "OEMetadataPackage": |
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self._doc["name"] = name |
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self._doc["title"] = title |
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self._doc["description"] = description |
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self._doc["@id"] = id_ |
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self._validated = False |
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return self |
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def add_resource( |
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self, |
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resource: dict, |
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*, |
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dedupe_by: str = "name", |
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overwrite: bool = True, |
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) -> "OEMetadataPackage": |
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if dedupe_by and overwrite: |
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self._doc["resources"] = [ |
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r |
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for r in self._doc["resources"] |
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if r.get(dedupe_by) != resource.get(dedupe_by) |
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] |
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self._doc["resources"].append(deepcopy(resource)) |
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self._validated = False |
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return self |
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def add_from_full_document( |
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self, full_doc: dict, *, take_root_if_empty: bool = False |
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) -> "OEMetadataPackage": |
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# Optionally fill root if still empty |
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if take_root_if_empty and not self._doc["name"]: |
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for k in ("name", "title", "description", "@id"): |
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if k in full_doc: |
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self._doc[k] = full_doc[k] |
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for r in full_doc.get("resources", []): |
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self.add_resource(r) |
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return self |
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def add_from_table_comment( |
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self, engine: Engine, schema: str, table: str |
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) -> "OEMetadataPackage": |
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sql = """ |
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SELECT obj_description((quote_ident(%s)||'.'||quote_ident(%s))::regclass, 'pg_class') AS comment |
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""" # noqa: E501 |
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with engine.begin() as conn: |
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comment = conn.exec_driver_sql(sql, (schema, table)).scalar() |
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if not comment: |
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return self |
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try: |
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full_doc = json.loads(comment) |
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except Exception: |
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return self |
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# Optionally validate the doc before merging |
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try: |
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validate_metadata(full_doc, check_license=False) |
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except Exception: |
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pass |
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return self.add_from_full_document(full_doc) |
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def finalize(self, *, license_check: bool = True) -> "OEMetadataPackage": |
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validate_metadata(self._doc, check_license=license_check) |
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self._validated = True |
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return self |
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def as_dict(self) -> dict: |
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if not self._validated: |
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self.finalize() |
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return deepcopy(self._doc) |
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def as_json(self) -> str: |
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return json.dumps(self.as_dict(), ensure_ascii=False) |
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openego /
eGon-data
