proxy_class.py

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from .proxy_interface import IWorkByProxy
from .proxy_class_real import Real_Classes_Container
 
 
class Proxy_Class(IWorkByProxy):
 
    
    def __init__(self) -> None:
        self._realClassInstance = None # type: IWorkByProxy
 
    
 
 
    
    def _GetRealClass(self) -> IWorkByProxy:
        if not self._realClassInstance:
            print("  --> Creating instance of real class...")
            self._realClassInstance = Real_Classes_Container.CreateReal()
        return self._realClassInstance
 
 
    #-------------------------------------------------
    # Implementation of the IWorkByProxy interface
    #-------------------------------------------------
 
    
    def DoWork(self, someArgument : str) -> str:
        print("  --> proxy class DoWork() in")
        realClass = self._GetRealClass()
        print("  --> Forwarding DoWork() call to real class...")
        return realClass.DoWork(someArgument)
 
 
#========================================================================
#========================================================================
 
 
 
class Proxy_Classes_Container:
    
    
    def CreateProxy() -> IWorkByProxy:
        return Proxy_Class()
 
 
 
__all__ = ["Proxy_Classes_Container"]