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from .._private.tree_element import AtkTreeElement
from .leaf import AtkTreeLeaf


__all__ = ["AtkTree"]

class AtkTree(object):
    _node_types = set()

    def __init__(self, root=None):
        self.root = root

        
    @property
    def root(self):
        return self.__root

        
    @root.setter
    def root(self, value):
        if isinstance(value, AtkTreeElement):
            self.__root = value
        else:
            self.__root = AtkTreeLeaf(value)


    def get_node(self, value):
        return self.root.get_node(value)

        
    def leaves(self, filtre=None, value=True):
        return self.root.leaves(filtre, value)


    @classmethod        
    def is_node(cls, node_type):
        # node_tags = [node_type.tag for node_type in self._node_types]
        # return tag in node_tags

        return (node_type in cls._node_types)

    
    # TODO trouver un moyen pour que cette methode puissent etre invoque a la creation des classes filles        
    # @classmethod        
    # def _add_node_type(cls, node_type):
    #     cls._node_types.add(node_type)

