Go语言设计模式-goDesignPattern-实战源码-Go资源

//++++++++++++++++++++++++++++++++++++++++ // 《Go语言设计模式》源码 //++++++++++++++++++++++++++++++++++++++++ // Author:廖显东（ShirDon） // Blog:https://www.shirdon.com/ // 作者知乎：https://www.zhihu.com/people/shirdonl // 仓库地址：https://gitee.com/shirdonl/goDesignPattern // 仓库地址：https://github.com/shirdonl/goDesignPattern // 交流咨询，请关注公众号"源码大数据" //++++++++++++++++++++++++++++++++++++++++ package actualCombat // 发票数据对象 type Invoice struct { Day int Notice int IsSent bool } // 数据规格接口 type Specification interface { IsSatisfiedBy(Invoice) bool And(Specification) Specification Or(Specification) Specification Not() Specification Relate(Specification) } // 组合规格 type CompositeSpecification struct { Specification } // 检查规格 func (cs *CompositeSpecification) IsSatisfiedBy(in Invoice) bool { return false } // 规格与操作 func (cs *CompositeSpecification) And(spec Specification) Specification { a := &AndSpecification{ cs.Specification, spec, } a.Relate(a) return a } // 规格或操作 func (cs *CompositeSpecification) Or(spec Specification) Specification { a := &OrSpecification{ cs.Specification, spec, } a.Relate(a) return a } // 规格非操作 func (cs *CompositeSpecification) Not() Specification { a := &NotSpecification{ cs.Specification, } a.Relate(a) return a } // 与规格有关 func (cs *CompositeSpecification) Relate(spec Specification) { cs.Specification = spec } // 与规格 type AndSpecification struct { Specification compare Specification } // 检查规格 func (as *AndSpecification) IsSatisfiedBy(in Invoice) bool { return as.Specification.IsSatisfiedBy(in) && as.compare.IsSatisfiedBy(in) } // 或规格 type OrSpecification struct { Specification compare Specification } // 检查规格 func (os *OrSpecification) IsSatisfiedBy(in Invoice) bool { return os.Specification.IsSatisfiedBy(in) || os.compare.IsSatisfiedBy(in) } // 非规格 type NotSpecification struct { Specification } // 检查规格 func (ns *NotSpecification) IsSatisfiedBy(in Invoice) bool { return ns.Specification.IsSatisfiedBy(in) } // 数据到期规格 type OverDueSpecification struct { Specification } // 检查规格 func (os *OverDueSpecification) IsSatisfiedBy(in Invoice) bool { return in.Day >= 30 } // 创建数据到期规格 func NewOverDueSpecification() Specification { a := &OverDueSpecification{&CompositeSpecification{}} a.Relate(a) return a } // 通知发送规格 type NoticeSentSpecification struct { Specification } // 检查规格 func (ns *NoticeSentSpecification) IsSatisfiedBy(in Invoice) bool { return in.Notice >= 3 } // 创建通知发送规格 func NewNoticeSentSpecification() Specification { a := &NoticeSentSpecification{&CompositeSpecification{}} a.Relate(a) return a } // 是否收到发票通知规格 type InCollectionSpecification struct { Specification } // 检查规格 func (ics *InCollectionSpecification) IsSatisfiedBy(in Invoice) bool { return !in.IsSent } // 创建是否收到发票通知规格 func NewInCollectionSpecification() Specification { a := &InCollectionSpecification{&CompositeSpecification{}} a.Relate(a) return a }