interfaceの確認

embeded.go

package main

import (
        "fmt"
)

type BaseDownloader struct {
}

type BaseUploader struct {
}

func (d *BaseDownloader)download() {
        fmt.Println("base download")
}

func (u *BaseUploader)upload() {
        fmt.Println("base upload")
}

type ParserParent interface {
        parse()
}

type BaseParser struct {
}

func (p *BaseParser)parse() {
        fmt.Println("base parse")
}


type JSONParser struct {
}
type CSVParser  struct {
}

func (p *JSONParser)parse() {
        fmt.Println("JSONParser")
}

func (p *CSVParser)parse() {
        fmt.Println("CSVParser")
}


type FileParser interface {
        download()
        parse()
        upload()
}

type BaseComponent struct {
        *BaseDownloader
        ParserParent
        *BaseUploader
}

func main() {
        var fp FileParser
        bc := BaseComponent{
                &BaseDownloader{},
                &BaseParser{},
                &BaseUploader{},
        }
        fp = &bc
        fp.download()
        fp.parse()
        fp.upload()
        bcj := BaseComponent{
                &BaseDownloader{},
                &JSONParser{},
                &BaseUploader{},
        }
        fp = &bcj
        fp.download()
        fp.parse()
        fp.upload()
}