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abstract_factory.go
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package abstract_factory
import "fmt"
/*
更灵活的创建对象的方法
*/
type Shape interface {
Draw()
}
type circle struct {
}
func (c *circle) Draw() {
fmt.Println("i am circle")
}
type square struct {
}
func (s *square) Draw() {
fmt.Println("i am square")
}
type ellipse struct {
}
func (e *ellipse) Draw() {
fmt.Println("i am ellipse")
}
type rectangle struct {
}
func (r *rectangle) Draw() {
fmt.Println("i am rectangle")
}
// ShapeFactory is an interface for a factory which can be used
// to create curved and straight shapes.
type ShapeFactory interface {
CreateCurvedShape() Shape
CreateStraightShape() Shape
}
type simpleShapeFactory struct {
}
// NewSimpleShapeFactory creates a new simpleShapeFactory.
func NewSimpleShapeFactory() ShapeFactory {
return &simpleShapeFactory{}
}
func (s *simpleShapeFactory) CreateCurvedShape() Shape {
return &circle{}
}
func (s *simpleShapeFactory) CreateStraightShape() Shape {
return &square{}
}
type robustShapeFactory struct {
}
// NewRobustShapeFactory creates a new robustShapeFactory.
func NewRobustShapeFactory() ShapeFactory {
return &robustShapeFactory{}
}
func (s *robustShapeFactory) CreateCurvedShape() Shape {
return &ellipse{}
}
func (s *robustShapeFactory) CreateStraightShape() Shape {
return &rectangle{}
}