100 lines
4.2 KiB
Python
100 lines
4.2 KiB
Python
# IfcOpenShell - IFC toolkit and geometry engine
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# Copyright (C) 2022 Dion Moult <dion@thinkmoult.com>
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#
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# This file is part of IfcOpenShell.
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#
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# IfcOpenShell is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# IfcOpenShell is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public License
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# along with IfcOpenShell. If not, see <http://www.gnu.org/licenses/>.
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from typing import Optional
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import ifcopenshell.util.element
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def get_references(element: ifcopenshell.entity_instance, should_inherit=True) -> set[ifcopenshell.entity_instance]:
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"""Gets classification references associated with the element
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:param should_inherit: If true, classification references are inherited
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from the type. Classifications can be overriden per system.
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:return: A set of IfcClassificationReference
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"""
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results = set()
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if not element.is_a("IfcRoot"):
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if (references := getattr(element, "HasExternalReferences", None)) is not None or (
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references := getattr(element, "HasExternalReference", None)
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) is not None:
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return {r.RelatingReference for r in references}
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if should_inherit and element.is_a("IfcObject"):
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element_type = ifcopenshell.util.element.get_type(element)
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if element_type and element_type != element:
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results = get_references(element_type)
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occurrence_results = {
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r.RelatingClassification
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for r in getattr(element, "HasAssociations", [])
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if r.is_a("IfcRelAssociatesClassification")
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}
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if results:
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type_references_per_system = {}
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occurrence_references_per_system = {}
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for result in results:
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type_references_per_system.setdefault(get_classification(result), []).append(result)
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for result in occurrence_results:
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occurrence_references_per_system.setdefault(get_classification(result), []).append(result)
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type_references_per_system.update(occurrence_references_per_system)
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results = set()
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for values in type_references_per_system.values():
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[results.add(v) for v in values]
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return results
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return occurrence_results
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def get_classification(reference: ifcopenshell.entity_instance) -> ifcopenshell.entity_instance:
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"""Get the IfcClassification that a classification reference belongs to
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:param reference: An IfcClassificationReference
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:return: IfcClassification
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"""
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if reference.is_a("IfcClassification"):
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return reference
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return get_classification(reference.ReferencedSource) if reference.ReferencedSource is not None else None
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def get_inherited_references(reference: Optional[ifcopenshell.entity_instance]) -> list[ifcopenshell.entity_instance]:
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results = []
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while True:
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if not reference or reference.is_a("IfcClassification"):
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break
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results.append(reference)
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reference = reference.ReferencedSource
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return results
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def get_classification_data(file: ifcopenshell.file) -> Optional[tuple[list[dict], str]]:
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if not file or not file.by_type("IfcClassification"):
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return [], ""
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classification = file.by_type("IfcClassification")[0]
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classification_name = classification.Name
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def process_references(reference):
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data = reference.get_info()
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del data["ReferencedSource"]
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data["referenced_source"] = reference.ReferencedSource.id() if reference.ReferencedSource else None
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data["has_references"] = bool(reference.HasReferences)
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data["references"] = (
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[process_references(ref) for ref in reference.HasReferences] if reference.HasReferences else []
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)
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return data
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classification_data = [process_references(reference) for reference in classification.HasReferences]
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return classification_data, classification_name
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