设计模式 decorator 实现

golang 设计模式 decorator 代码实现

package decorator

type Component interface {
	Calc() int
}

type ConcreteComponent struct{}

func (*ConcreteComponent) Calc() int {
	return 0
}

type MulDecorator struct {
	Component
	num int
}

func WarpMulDecorator(c Component, num int) Component {
	return &MulDecorator{
		Component: c,
		num:       num,
	}
}

func (d *MulDecorator) Calc() int {
	return d.Component.Calc() * d.num
}

type AddDecorator struct {
	Component
	num int
}

func WarpAddDecorator(c Component, num int) Component {
	return &AddDecorator{
		Component: c,
		num:       num,
	}
}

func (d *AddDecorator) Calc() int {
	return d.Component.Calc() + d.num
}

目录

go 设计模式

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装饰模式

设计模式 decorator_test 实现