Creational pattern => Builder

rezamobaraki · rezamobaraki · commit f542cb8ddb59 · 2021-03-28T14:10:55.000+04:30
diff --git a/builder.py b/builder.py
@@ -0,0 +1,116 @@
+"""
+    Creational :
+        Builder => every builders designed patterns has director class to attach
+                   each side of objects
+"""
+
+
+class Director:
+    __builder = None
+
+    def set_builder(self, builder):
+        self.__builder = builder
+
+    def get_car(self):
+        car = Car()
+
+        body = self.__builder.get_body()
+        car.set_body(body)
+
+        wheel = self.__builder.get_wheel()
+        car.set_wheel(wheel)
+
+        engine = self.__builder.get_engine()
+        car.set_engine(engine)
+        return car
+
+
+# ----------------------------------------
+class Car:
+    def __init__(self):
+        self.__wheel = None
+        self.__engine = None
+        self.__body = None
+
+    def set_wheel(self, wheel):
+        self.__wheel = wheel
+
+    def set_body(self, body):
+        self.__body = body
+
+    def set_engine(self, engine):
+        self.__engine = engine
+
+    def detail(self):
+        print(f'Body: {self.__body.shape}')
+        print(f'Engine: {self.__engine.hp}')
+        print(f'Wheel: {self.__wheel.size}')
+
+
+# ----------------------------------------
+class Builder:
+    def get_engine(self):
+        pass
+
+    def get_wheel(self):
+        pass
+
+    def get_body(self):
+        pass
+
+
+class Benz(Builder):
+    def get_body(self):
+        body = Body()
+        body.shape = 'Suv'
+        return body
+
+    def get_engine(self):
+        engine = Engine()
+        engine.hp = 500
+        return engine
+
+    def get_wheel(self):
+        wheel = Wheel()
+        wheel.size = 22
+        return wheel
+
+
+class Bmw(Builder):
+    def get_body(self):
+        body = Body()
+        body.shape = 'Sedan'
+        return body
+
+    def get_engine(self):
+        engine = Engine()
+        engine.hp = 340
+        return engine
+
+    def get_wheel(self):
+        wheel = Wheel()
+        wheel.size = 18
+        return wheel
+
+
+# ----------------------------------------
+class Wheel:
+    size = None
+
+
+class Body:
+    shape = None
+
+
+class Engine:
+    hp = None
+
+
+# ----------------------------------------
+
+
+car1 = Bmw()
+director = Director()
+director.set_builder(car1)
+b1 = director.get_car()
+b1.detail()
