diig_run_02.go

func (e *Encryptor) Run(srcType, dstType string) error {
    var src []byte
    switch srcType {
    case "file":
        src = e.readFromFile(...)
    case "database":
        src = e.readFromDatabase(...)
    }

    // encrypt
    r := e.encrypt(dat)

    switch dstType {
    case "file":
        src = e.writeToFile(r)
    case "webservice":
        src = e.writeToWebservice(r)
    }
}