source: SHX/trunk/src/SeismicHandler/basics/tools.py @ 258

# -*- coding: utf-8 -*-

"""
Collection of globally used helper functions.
"""
__all__ = ["Property", "Singleton"]

# property wrapper
def Property(func):
    return property(**func())

class Singleton(type):
    """
    Meta-class for singletons.
    """

    def __init__(cls, name, bases, dic):
        super(Singleton, cls).__init__(name, bases, dic)
        cls.instance = None

    def __call__(cls, *args, **kwargs):
        if cls.instance is None:
            cls.instance = super(Singleton, cls).__call__(*args, **kwargs)

        return cls.instance