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- # Copyright (c) 2018 Ultimaker B.V.
- # Cura is released under the terms of the LGPLv3 or higher.
- from typing import Optional, Any, Dict, Union, TYPE_CHECKING
- from collections import OrderedDict
- from UM.ConfigurationErrorMessage import ConfigurationErrorMessage
- from UM.Logger import Logger
- from UM.Settings.InstanceContainer import InstanceContainer
- if TYPE_CHECKING:
- from cura.Machines.QualityGroup import QualityGroup
- ##
- # A metadata / container combination. Use getContainer() to get the container corresponding to the metadata.
- #
- # ContainerNode is a multi-purpose class. It has two main purposes:
- # 1. It encapsulates an InstanceContainer. It contains that InstanceContainer's
- # - metadata (Always)
- # - container (lazy-loaded when needed)
- # 2. It also serves as a node in a hierarchical InstanceContainer lookup table/tree.
- # This is used in Variant, Material, and Quality Managers.
- #
- class ContainerNode:
- __slots__ = ("metadata", "container", "children_map")
- def __init__(self, metadata: Optional[Dict[str, Any]] = None) -> None:
- self.metadata = metadata
- self.container = None
- self.children_map = OrderedDict() #type: OrderedDict[str, Union[QualityGroup, ContainerNode]]
- ## Get an entry value from the metadata
- def getMetaDataEntry(self, entry: str, default: Any = None) -> Any:
- if self.metadata is None:
- return default
- return self.metadata.get(entry, default)
- def getChildNode(self, child_key: str) -> Optional["ContainerNode"]:
- return self.children_map.get(child_key)
- def getContainer(self) -> Optional["InstanceContainer"]:
- if self.metadata is None:
- Logger.log("e", "Cannot get container for a ContainerNode without metadata.")
- return None
- if self.container is None:
- container_id = self.metadata["id"]
- from UM.Settings.ContainerRegistry import ContainerRegistry
- container_list = ContainerRegistry.getInstance().findInstanceContainers(id = container_id)
- if not container_list:
- Logger.log("e", "Failed to lazy-load container [{container_id}]. Cannot find it.".format(container_id = container_id))
- error_message = ConfigurationErrorMessage.getInstance()
- error_message.addFaultyContainers(container_id)
- return None
- self.container = container_list[0]
- return self.container
- def __str__(self) -> str:
- return "%s[%s]" % (self.__class__.__name__, self.getMetaDataEntry("id"))
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