Python-da Prototype dizayn nümunəsi

prototype.py

import copy
from abc import ABC, abstractmethod

# Abstract class defining the prototype interface
class Character(ABC):
    def __init__(self, name="", weapon="", armor="", ability=""):
        self.name = name
        self.weapon = weapon
        self.armor = armor
        self.ability = ability

    @abstractmethod
    def clone(self):
        pass

    def __str__(self):
        return (
            f"Character(name={self.name}, weapon={self.weapon}, "
            f"armor={self.armor}, ability={self.ability})"
        )

# Concrete prototype: Warrior
class Warrior(Character):
    def __init__(self):
        super().__init__(
            name="Warrior", weapon="sword", armor="heavy armor", ability="strength"
        )

    def clone(self):
        # Creates a deep copy to ensure independence from the original
        return copy.deepcopy(self)

# Concrete prototype: Mage
class Mage(Character):
    def __init__(self):
        super().__init__(name="Mage", weapon="staff", armor="robe", ability="fireball")

    def clone(self):
        # Creates a deep copy to ensure independence from the original
        return copy.deepcopy(self)

# Registry to store and manage prototype characters
class CharacterRegistry:
    def __init__(self):
        self._characters = {}

    def add_character(self, name, character):
        # Adds a prototype to the registry
        self._characters[name] = character

    def get_character(self, name):
        # Returns a cloned instance of the requested prototype
        if name in self._characters:
            return self._characters[name].clone()
        return None

# Client code demonstrating the usage
if __name__ == "__main__":
    # Create a registry
    registry = CharacterRegistry()

    # Add prototype characters to the registry
    registry.add_character("warrior", Warrior())
    registry.add_character("mage", Mage())

    # Clone and display a Warrior
    warrior = registry.get_character("warrior")
    print("Original Warrior:", warrior)

    # Clone and customize a Warrior
    custom_warrior = registry.get_character("warrior")
    custom_warrior.weapon = "axe"
    custom_warrior.armor = "light armor"
    print("Customized Warrior:", custom_warrior)

    # Clone and display a Mage
    mage = registry.get_character("mage")
    print("Mage:", mage)

    # Verify the original Warrior remains unchanged
    original_warrior = registry.get_character("warrior")
    print("Original Warrior (unchanged):", original_warrior)

    # Output:
    # Original Warrior: Character(name=Warrior, weapon=sword, armor=heavy armor, ability=strength)
    # Customized Warrior: Character(name=Warrior, weapon=axe, armor=light armor, ability=strength)
    # Mage: Character(name=Mage, weapon=staff, armor=robe, ability=fireball)
    # Original Warrior (unchanged): Character(name=Warrior, weapon=sword, armor=heavy armor, ability=strength)