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ifcpatch: add FixDoubleTypedPredefinedType recipe for OJT001 cleanup
Existing IFC files (Revit exports, or Bonsai models typed before a type's PredefinedType was set) commonly carry an explicit PredefinedType/ObjectType on occurrences whose type already has a concrete PredefinedType, violating buildingSMART rule OJT001. PR #8829 stops this happening going forward at the authoring layer; this recipe is the one-click cleanup for files that already have the problem. The "is the type concrete" check mirrors ifcopenshell.api.type.assign_type and ifcopenshell.api.attribute.edit_attributes exactly, including the USERDEFINED nuance (only counts as concrete if the type also carries a custom description to fall back on), so behaviour stays consistent between authoring and cleanup. Bonsai's IFC Patch UI discovers recipes by globbing ifcpatch/recipes/*.py, so no Bonsai UI changes are needed. Generated with the assistance of an AI coding tool.
This commit is contained in:
Petru Conduraru
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# IfcPatch - IFC patching utiliy
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# Copyright (C) 2020, 2021 Dion Moult <dion@thinkmoult.com>
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#
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# This file is part of IfcPatch.
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#
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# IfcPatch 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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# IfcPatch 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 IfcPatch. If not, see <http://www.gnu.org/licenses/>.
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# This file was generated with the assistance of an AI coding tool.
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from logging import Logger
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from typing import Union
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import ifcopenshell
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import ifcopenshell.util.element
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import ifcopenshell.util.selector
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import ifcpatch
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class Patcher(ifcpatch.BasePatcher):
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def __init__(self, file: ifcopenshell.file, logger: Union[Logger, None] = None, query: str = ""):
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"""Clear an occurrence's PredefinedType/ObjectType when its type is already concrete
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IFC forbids "double typing": if an IfcTypeObject's own PredefinedType
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is a concrete value (i.e. not NOTDEFINED), the PredefinedType and
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ObjectType of its typed occurrences must be left empty, since the
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type already carries that information (buildingSMART rule OJT001).
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Legacy files, or files typed before their type's PredefinedType was
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set, commonly carry a stray PredefinedType (often NOTDEFINED) or
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ObjectType on the occurrence anyway. This recipe finds every
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occurrence typed by a type with a concrete PredefinedType and clears
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the occurrence's own PredefinedType and ObjectType attributes,
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without touching untyped occurrences or occurrences of a type that is
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itself NOTDEFINED (as those may still carry meaningful data of their
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own).
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The "is the type concrete" check mirrors
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ifcopenshell.api.type.assign_type and
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ifcopenshell.api.attribute.edit_attributes: a type whose
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PredefinedType is USERDEFINED only counts as concrete if it also has
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a custom type name (e.g. ElementType) to fall back on. This keeps the
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recipe non-destructive: it will never remove the only description an
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occurrence has.
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:param query: A query to select the subset of IFC elements to
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restrict the patch to, optional. If not provided, patch will be
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applied to all typed occurrences in the model. See
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ifcopenshell.util.selector for query syntax.
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Example:
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.. code:: python
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# Fix all double-typed occurrences in the model.
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ifcpatch.execute({"input": "input.ifc", "file": model, "recipe": "FixDoubleTypedPredefinedType"})
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# Only fix double-typed walls.
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ifcpatch.execute({
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"input": "input.ifc",
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"file": model,
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"recipe": "FixDoubleTypedPredefinedType",
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"arguments": ["IfcWall"],
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})
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"""
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super().__init__(file, logger)
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self.query = query
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def patch(self):
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occurrences = None
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if self.query:
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occurrences = ifcopenshell.util.selector.filter_elements(self.file, self.query)
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cleared = 0
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for rel in self.file.by_type("IfcRelDefinesByType"):
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predefined_type = ifcopenshell.util.element.get_predefined_type(rel.RelatingType)
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if predefined_type is None or predefined_type == "NOTDEFINED":
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continue
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for occurrence in rel.RelatedObjects:
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if occurrences is not None and occurrence not in occurrences:
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continue
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has_predefined_type = hasattr(occurrence, "PredefinedType")
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if not occurrence.ObjectType and (not has_predefined_type or not occurrence.PredefinedType):
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continue # Already clean.
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occurrence.ObjectType = None
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if has_predefined_type:
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occurrence.PredefinedType = None
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cleared += 1
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self.logger.info(f"Cleared PredefinedType/ObjectType on {cleared} double-typed occurrence(s).")
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@@ -0,0 +1,187 @@
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# IfcOpenShell - IFC toolkit and geometry engine
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# Copyright (C) 2026 Petru Conduraru <petru@bimvoice.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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# This file was generated with the assistance of an AI coding tool.
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import ifcopenshell.api.root
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import ifcopenshell.api.type
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import ifcpatch
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import test.bootstrap
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class TestFixDoubleTypedPredefinedType(test.bootstrap.IFC4):
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def test_clears_occurrence_under_concrete_type(self):
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wall_type = ifcopenshell.api.root.create_entity(self.file, ifc_class="IfcWallType", name="WT1")
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wall_type.PredefinedType = "MOVABLE"
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wall = ifcopenshell.api.root.create_entity(self.file, ifc_class="IfcWall")
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wall.PredefinedType = "NOTDEFINED"
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wall.ObjectType = "Some legacy value"
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ifcopenshell.api.type.assign_type(
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self.file, related_objects=[wall], relating_type=wall_type, should_map_representations=False
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)
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# assign_type would already clear these; force them back to simulate
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# a legacy file where the occurrence was typed before this cleanup
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# existed.
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wall.PredefinedType = "NOTDEFINED"
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wall.ObjectType = "Some legacy value"
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output = ifcpatch.execute({"file": self.file, "recipe": "FixDoubleTypedPredefinedType", "arguments": []})
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assert wall.PredefinedType is None
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assert wall.ObjectType is None
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assert output == self.file
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def test_leaves_occurrence_under_notdefined_type_untouched(self):
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wall_type = ifcopenshell.api.root.create_entity(self.file, ifc_class="IfcWallType", name="WT1")
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wall_type.PredefinedType = "NOTDEFINED"
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wall = ifcopenshell.api.root.create_entity(self.file, ifc_class="IfcWall")
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wall.PredefinedType = "MOVABLE"
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wall.ObjectType = "Legitimate own value"
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ifcopenshell.api.type.assign_type(
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self.file, related_objects=[wall], relating_type=wall_type, should_map_representations=False
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)
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wall.PredefinedType = "MOVABLE"
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wall.ObjectType = "Legitimate own value"
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ifcpatch.execute({"file": self.file, "recipe": "FixDoubleTypedPredefinedType", "arguments": []})
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assert wall.PredefinedType == "MOVABLE"
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assert wall.ObjectType == "Legitimate own value"
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def test_leaves_untyped_element_untouched(self):
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wall = ifcopenshell.api.root.create_entity(self.file, ifc_class="IfcWall")
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wall.PredefinedType = "NOTDEFINED"
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wall.ObjectType = "Untyped value"
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ifcpatch.execute({"file": self.file, "recipe": "FixDoubleTypedPredefinedType", "arguments": []})
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assert wall.PredefinedType == "NOTDEFINED"
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assert wall.ObjectType == "Untyped value"
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def test_userdefined_type_with_custom_description_clears_occurrence(self):
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# Mirrors ifcopenshell.api.type.assign_type: a USERDEFINED type only
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# counts as "concrete" if it also has a custom type name to fall
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# back on (here IfcWallType.ElementType).
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wall_type = ifcopenshell.api.root.create_entity(self.file, ifc_class="IfcWallType", name="WT1")
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wall_type.PredefinedType = "USERDEFINED"
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wall_type.ElementType = "MyCustomWall"
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wall = ifcopenshell.api.root.create_entity(self.file, ifc_class="IfcWall")
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wall.PredefinedType = "NOTDEFINED"
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wall.ObjectType = "Some legacy value"
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ifcopenshell.api.type.assign_type(
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self.file, related_objects=[wall], relating_type=wall_type, should_map_representations=False
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)
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wall.PredefinedType = "NOTDEFINED"
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wall.ObjectType = "Some legacy value"
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ifcpatch.execute({"file": self.file, "recipe": "FixDoubleTypedPredefinedType", "arguments": []})
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assert wall.PredefinedType is None
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assert wall.ObjectType is None
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def test_userdefined_type_without_custom_description_untouched(self):
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# A USERDEFINED type with no ElementType/ObjectType of its own
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# carries no real type information, so assign_type leaves the
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# occurrence alone. This recipe mirrors that.
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wall_type = ifcopenshell.api.root.create_entity(self.file, ifc_class="IfcWallType", name="WT1")
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wall_type.PredefinedType = "USERDEFINED"
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wall = ifcopenshell.api.root.create_entity(self.file, ifc_class="IfcWall")
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wall.PredefinedType = "NOTDEFINED"
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wall.ObjectType = "Kept because type has no description"
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ifcopenshell.api.type.assign_type(
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self.file, related_objects=[wall], relating_type=wall_type, should_map_representations=False
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)
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wall.PredefinedType = "NOTDEFINED"
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wall.ObjectType = "Kept because type has no description"
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ifcpatch.execute({"file": self.file, "recipe": "FixDoubleTypedPredefinedType", "arguments": []})
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assert wall.PredefinedType == "NOTDEFINED"
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assert wall.ObjectType == "Kept because type has no description"
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def test_already_clean_file_is_a_no_op(self):
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wall_type = ifcopenshell.api.root.create_entity(self.file, ifc_class="IfcWallType", name="WT1")
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wall_type.PredefinedType = "MOVABLE"
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wall = ifcopenshell.api.root.create_entity(self.file, ifc_class="IfcWall")
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ifcopenshell.api.type.assign_type(
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self.file, related_objects=[wall], relating_type=wall_type, should_map_representations=False
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)
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assert wall.PredefinedType is None
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assert wall.ObjectType is None
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before = self.file.to_string()
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ifcpatch.execute({"file": self.file, "recipe": "FixDoubleTypedPredefinedType", "arguments": []})
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assert self.file.to_string() == before
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def test_query_restricts_which_occurrences_are_touched(self):
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wall_type = ifcopenshell.api.root.create_entity(self.file, ifc_class="IfcWallType", name="WT1")
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wall_type.PredefinedType = "MOVABLE"
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wall = ifcopenshell.api.root.create_entity(self.file, ifc_class="IfcWall")
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wall.PredefinedType = "NOTDEFINED"
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column_type = ifcopenshell.api.root.create_entity(self.file, ifc_class="IfcColumnType", name="CT1")
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column_type.PredefinedType = "COLUMN"
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column = ifcopenshell.api.root.create_entity(self.file, ifc_class="IfcColumn")
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column.PredefinedType = "NOTDEFINED"
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ifcopenshell.api.type.assign_type(
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self.file, related_objects=[wall], relating_type=wall_type, should_map_representations=False
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)
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ifcopenshell.api.type.assign_type(
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self.file, related_objects=[column], relating_type=column_type, should_map_representations=False
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)
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wall.PredefinedType = "NOTDEFINED"
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column.PredefinedType = "NOTDEFINED"
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ifcpatch.execute({"file": self.file, "recipe": "FixDoubleTypedPredefinedType", "arguments": ["IfcWall"]})
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assert wall.PredefinedType is None
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assert column.PredefinedType == "NOTDEFINED"
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class TestFixDoubleTypedPredefinedTypeIFC2X3(test.bootstrap.IFC2X3):
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def test_ifc2x3_occurrence_without_predefined_type_attribute_is_guarded(self):
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# IFC2X3 IfcWallStandardCase has no PredefinedType attribute at all;
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# only ObjectType may be cleared there.
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wall_type = ifcopenshell.api.root.create_entity(self.file, ifc_class="IfcWallType", name="WT1")
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wall_type.PredefinedType = "STANDARD"
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wall = ifcopenshell.api.root.create_entity(self.file, ifc_class="IfcWallStandardCase")
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wall.ObjectType = "Some legacy value"
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assert not hasattr(wall, "PredefinedType")
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ifcopenshell.api.type.assign_type(
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self.file, related_objects=[wall], relating_type=wall_type, should_map_representations=False
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)
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wall.ObjectType = "Some legacy value"
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ifcpatch.execute({"file": self.file, "recipe": "FixDoubleTypedPredefinedType", "arguments": []})
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assert wall.ObjectType is None
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def test_ifc2x3_userdefined_type_without_elementtype_untouched(self):
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wall_type = ifcopenshell.api.root.create_entity(self.file, ifc_class="IfcWallType", name="WT1")
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wall_type.PredefinedType = "USERDEFINED"
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wall = ifcopenshell.api.root.create_entity(self.file, ifc_class="IfcWallStandardCase")
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wall.ObjectType = "Kept because type has no description"
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ifcopenshell.api.type.assign_type(
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self.file, related_objects=[wall], relating_type=wall_type, should_map_representations=False
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)
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wall.ObjectType = "Kept because type has no description"
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ifcpatch.execute({"file": self.file, "recipe": "FixDoubleTypedPredefinedType", "arguments": []})
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assert wall.ObjectType == "Kept because type has no description"
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