public static void createShapeTree()

in poi/src/main/java/org/apache/poi/hssf/usermodel/HSSFShapeFactory.java [51:147]
95 lines of code
24 McCabe index (conditional complexity)

    public static void createShapeTree(EscherContainerRecord container, EscherAggregate agg, HSSFShapeContainer out, DirectoryNode root) {
        if (container.getRecordId() == EscherContainerRecord.SPGR_CONTAINER) {
            ObjRecord obj = null;
            EscherRecord child = container.getChild(0);
            if (!(child instanceof EscherContainerRecord)) {
                throw new IllegalArgumentException("Had unexpected type of child: " + child.getClass());
            }
            EscherClientDataRecord clientData = ((EscherContainerRecord) child).getChildById(EscherClientDataRecord.RECORD_ID);
            if (null != clientData) {
                Record record = agg.getShapeToObjMapping().get(clientData);
                if (!(record instanceof ObjRecord)) {
                    throw new IllegalArgumentException("Had unexpected type of clientData: " + (record == null ? "<null>" : record.getClass()));
                }
                obj = (ObjRecord) record;
            }
            HSSFShapeGroup group = new HSSFShapeGroup(container, obj);
            List<EscherContainerRecord> children = container.getChildContainers();
            // skip the first child record, it is group descriptor
            if (children.size() > 1) {
                children.subList(1, children.size()).forEach(c -> createShapeTree(c, agg, group, root));
            }
            out.addShape(group);
        } else if (container.getRecordId() == EscherContainerRecord.SP_CONTAINER) {
            Map<EscherRecord, Record> shapeToObj = agg.getShapeToObjMapping();
            ObjRecord objRecord = null;
            TextObjectRecord txtRecord = null;

            for (EscherRecord record : container) {
                switch (EscherRecordTypes.forTypeID(record.getRecordId())) {
                    case CLIENT_DATA: {
                        Record subRecord = shapeToObj.get(record);
                        if (!(subRecord instanceof ObjRecord)) {
                            throw new RecordFormatException("Did not have a ObjRecord: " + subRecord);
                        }
                        objRecord = (ObjRecord) subRecord;
                        break;
                    }
                    case CLIENT_TEXTBOX: {
                        Record subRecord = shapeToObj.get(record);
                        if (!(subRecord instanceof TextObjectRecord)) {
                            throw new RecordFormatException("Did not have a TextObjRecord: " + subRecord);
                        }
                        txtRecord = (TextObjectRecord) subRecord;
                        break;
                    }
                    default:
                        break;
                }
            }
            if (objRecord == null) {
                throw new RecordFormatException("EscherClientDataRecord can't be found.");
            }
            if (isEmbeddedObject(objRecord)) {
                HSSFObjectData objectData = new HSSFObjectData(container, objRecord, root);
                out.addShape(objectData);
                return;
            }
            CommonObjectDataSubRecord cmo = (CommonObjectDataSubRecord) objRecord.getSubRecords().get(0);
            final HSSFShape shape;
            switch (cmo.getObjectType()) {
                case CommonObjectDataSubRecord.OBJECT_TYPE_PICTURE:
                    shape = new HSSFPicture(container, objRecord);
                    break;
                case CommonObjectDataSubRecord.OBJECT_TYPE_RECTANGLE:
                    shape = new HSSFSimpleShape(container, objRecord, txtRecord);
                    break;
                case CommonObjectDataSubRecord.OBJECT_TYPE_LINE:
                    shape = new HSSFSimpleShape(container, objRecord);
                    break;
                case CommonObjectDataSubRecord.OBJECT_TYPE_COMBO_BOX:
                    shape = new HSSFCombobox(container, objRecord);
                    break;
                case CommonObjectDataSubRecord.OBJECT_TYPE_MICROSOFT_OFFICE_DRAWING:
                    EscherOptRecord optRecord = container.getChildById(EscherOptRecord.RECORD_ID);
                    if(optRecord == null) {
                        shape = new HSSFSimpleShape(container, objRecord, txtRecord);
                    } else {
                        EscherProperty property = optRecord.lookup(EscherPropertyTypes.GEOMETRY__VERTICES);
                        if (null != property) {
                            shape = new HSSFPolygon(container, objRecord, txtRecord);
                        } else {
                            shape = new HSSFSimpleShape(container, objRecord, txtRecord);
                        }
                    }
                    break;
                case CommonObjectDataSubRecord.OBJECT_TYPE_TEXT:
                    shape = new HSSFTextbox(container, objRecord, txtRecord);
                    break;
                case CommonObjectDataSubRecord.OBJECT_TYPE_COMMENT:
                    shape = new HSSFComment(container, objRecord, txtRecord, agg.getNoteRecordByObj(objRecord));
                    break;
                default:
                    shape = new HSSFSimpleShape(container, objRecord, txtRecord);
            }
            out.addShape(shape);
        }
    }