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https://github.com/crazybber/go-pattern-examples.git
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80 lines
1.4 KiB
Go
80 lines
1.4 KiB
Go
package templatemethod
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import "fmt"
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////////////////////////////////
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//使用打印的例子
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//IPrinter 定义打印的流程
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type IPrinter interface {
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Set(mark string)
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Print()
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}
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//Printer 定义基本结构类型
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type Printer struct {
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workerMark string
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printer IPrinter //指项实际工作的类型
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}
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//LoadDrive 载入驱动
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func (p *Printer) LoadDrive() {
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fmt.Print("init print drive\n")
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}
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//UnLoadDrive 卸载驱动
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func (p *Printer) UnLoadDrive() {
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fmt.Print("unload drive\n")
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}
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//Set 设置参数,这是变化的部分
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func (p *Printer) Set(mark string) {
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p.workerMark = mark
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//调用实现
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if p.printer != nil {
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p.printer.Set(mark)
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}
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}
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//Print 执行打印,这是变化的部分
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func (p *Printer) Print() {
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//调用实现
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fmt.Print("print with task mark: ", p.workerMark, "\n")
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if p.printer != nil {
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p.printer.Print()
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}
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}
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//DoPrintWork 打印
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//DoPrintWork 定义了打印的流程
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func (p *Printer) DoPrintWork() {
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p.LoadDrive()
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p.Set(p.workerMark)
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p.Print()
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p.UnLoadDrive()
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}
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//PDF 虚拟打印
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type PDF struct {
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Printer
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output string
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}
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//Print to a PDF
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func (p *PDF) Print() {
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fmt.Print("print to PDF ,save to ", p.output, "\n")
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}
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//DevicePrinter 设备打印机
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type DevicePrinter struct {
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Printer
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quality int //1,2,3表示打印高中低
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}
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//Print to a Paper
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func (d *DevicePrinter) Print() {
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fmt.Print("print to Paper ,with quality: ", d.quality, "\n")
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}
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