Initial commit

Author: janbrouwer

ifc2json.py

@@ -0,0 +1,103 @@
+import ifcopenshell
+import json
+
+ifc_file = ifcopenshell.open('./samples/7m900_tue_hello_wall_with_door.ifc')
+schema = ifcopenshell.ifcopenshell_wrapper.schema_by_name(ifc_file.schema)
+id_objects = {}
+
+def entityToDict(entity):
+    ref = {
+        "Type": entity.is_a()
+    }
+    attr_dict = entity.__dict__
+
+    # check for globalid
+    if "GlobalId" in attr_dict:
+        ref["ref"] = attr_dict["GlobalId"]
+        if not attr_dict["GlobalId"] in id_objects:
+            d = {
+                "Type": entity.is_a()
+            }
+
+            for i in range(0,len(entity)):
+                attr = entity.attribute_name(i)
+                if attr in attr_dict:
+                    if not attr == "OwnerHistory":
+                        jsonValue = getEntityValue(attr_dict[attr])
+                        if jsonValue:
+                            d[attr] = jsonValue
+                        if attr_dict[attr] == None:
+                            continue
+                        elif isinstance(attr_dict[attr], ifcopenshell.entity_instance):
+                            d[attr] = entityToDict(attr_dict[attr])
+                        elif isinstance(attr_dict[attr], tuple):
+                            subEnts = []
+                            for subEntity in attr_dict[attr]:
+                                if isinstance(subEntity, ifcopenshell.entity_instance):
+                                    subEntJson = entityToDict(subEntity)
+                                    if subEntJson:
+                                        subEnts.append(subEntJson)
+                                else:
+                                    subEnts.append(subEntity)
+                            if len(subEnts) > 0:
+                                d[attr] = subEnts
+                        else:
+                            d[attr] = attr_dict[attr]
+            id_objects[attr_dict["GlobalId"]] = d
+        return ref
+    else:
+        d = {
+            "Type": entity.is_a()
+        }
+
+        for i in range(0,len(entity)):
+            attr = entity.attribute_name(i)
+            if attr in attr_dict:
+                if not attr == "OwnerHistory":
+                    jsonValue = getEntityValue(attr_dict[attr])
+                    if jsonValue:
+                        d[attr] = jsonValue
+                    if attr_dict[attr] == None:
+                        continue
+                    elif isinstance(attr_dict[attr], ifcopenshell.entity_instance):
+                        d[attr] = entityToDict(attr_dict[attr])
+                    elif isinstance(attr_dict[attr], tuple):
+                        subEnts = []
+                        for subEntity in attr_dict[attr]:
+                            if isinstance(subEntity, ifcopenshell.entity_instance):
+                                # subEnts.append(None)
+                                subEntJson = entityToDict(subEntity)
+                                if subEntJson:
+                                    subEnts.append(subEntJson)
+                            else:
+                                subEnts.append(subEntity)
+                        if len(subEnts) > 0:
+                            d[attr] = subEnts
+                    else:
+                        d[attr] = attr_dict[attr]
+        return d
+
+def getEntityValue(value):
+    if value == None:
+        jsonValue = None
+    elif isinstance(value, ifcopenshell.entity_instance):
+        jsonValue = entityToDict(value)
+    elif isinstance(value, tuple):
+        jsonValue = None
+        subEnts = []
+        for subEntity in value:
+            subEnts.append(getEntityValue(subEntity))
+        jsonValue = subEnts
+    else:
+        jsonValue = value
+    return jsonValue
+
+
+jsonObjects= []
+entityIter = iter(ifc_file)
+for entity in entityIter:
+    entityToDict(entity)
+for key in id_objects:
+    jsonObjects.append(id_objects[key])
+with open('7m900_tue_hello_wall_with_door.json', 'w') as outfile:
+    json.dump(jsonObjects, outfile, indent=4)