Sharing ngabuburit Ramadhan 2020 bersama Yogya Android Community dan Android Amikom Developer.

DeisgnPatternByExample.kt

// JUMP TO LINE CODE 214 TO SEE THE MAIN APPS 

//=============== CASE 1 ===============
data class Nasabah(var name:String, var alamatTinggal:String,
                   var alamatKtp:String, var tglLahir:String, var tempatLahir:String,
                   var umur:String, var jmlAnak:String, var statusNikah:String="menikah",
                   var statusRumah:String, var nmrKtp:String, var namaIbuKandung:String,
                   var namaAliasIbuKandung:String, var namaPasangan:String="", var statusPasangan:String="menikah")

//=====================================
//             CASE 2
//=====================================

class QuestionForm () {
    var listQuestion:ArrayList<Question> = ArrayList()

    fun addQuestion(question: Question){
        this.listQuestion.add(question)
    }

    fun showQuestion() {
        listQuestion.forEach {
            it.printQuestion()
        }
    }
}

//====================================
//==========  CASE 3  ================

interface CallEngine{
    fun setup()
    fun dial()
    fun hangup()
}

class GoogleCallEngine:CallEngine{
    override fun setup() {
        println("setup from google call engine")
    }

    override fun dial() {
        println("dial from google call engine")
    }

    override fun hangup() {
        println("hangup from google call engine")
    }
}

class WhatsappCallEngine:CallEngine{
    override fun setup() {
        println("setup from whatsaapp call engine")
    }

    override fun dial() {
        println("dial from whatsaapp call engine")
    }

    override fun hangup() {
        println("hangup from whatsaapp call engine")
    }
}

class SDKCallEngine{
    lateinit var callEngine:CallEngine
    fun addCallEngine(engine: CallEngine){
        this.callEngine = engine
    }

    fun makeACall(){
        this.callEngine.setup()
        this.callEngine.dial()
    }

    fun closeThePhone(){
        this.callEngine.hangup()
    }
}

class QuestionEssay(var title:String):Question{
    var listQuestion:ArrayList<Question> = ArrayList()
    override fun printQuestion() {
        println("question (title='$title') and has sub ${listQuestion.size}")
        if(!listQuestion.isEmpty()){
            listQuestion.forEach {
                it.printQuestion()
            }
        }
    }

    override fun addSubQuestion(objects: Question) {
        this.listQuestion.add(objects)
    }
}
class QuestionOptional(var title:String):Question{
    var listQuestion:ArrayList<Question> = ArrayList()
    override fun printQuestion() {
        println("question (title='$title') and has sub ${listQuestion.size}")
        if(!listQuestion.isEmpty()){
            listQuestion.forEach {
                it.printQuestion()
            }
        }
    }

    override fun addSubQuestion(objects: Question) {
        this.listQuestion.add(objects)
    }
}

interface Question{
    fun printQuestion()
    fun addSubQuestion(objects: Question)
}

//=================================
//         CASE 4
//=================================

interface ConnectionService{
    fun connecting()
    fun onConnected()
    fun onDisconnected()
    fun disconnecting()
    fun addDownloaderService(downloaderService: DownloaderService)
}

interface DownloaderService{
    fun download()
    fun resume()
    fun cancel()
    fun addConnectionMonitor(connectionService: ConnectionService)
}

class AndroidMainApps{
    lateinit var downloader:DownloaderService
    lateinit var connection: ConnectionService

    fun onCreated() {
        connection = ConnectionMonitor()
        downloader = FasterDownloader()

        connection.addDownloaderService(downloader)
        downloader.addConnectionMonitor(connection)

    }

    fun Download(){
        downloader.download()
    }
    fun cancel(){
        downloader.cancel()
    }
    fun resume(){
        downloader.resume()
    }
    fun airplaneMode(){
        connection.disconnecting()
    }


}
class ConnectionMonitor:ConnectionService{
    lateinit var downloaderService:DownloaderService

    override fun connecting() {
        println("connecting....")
    }

    override fun onConnected() {
        downloaderService.resume()
    }

    override fun onDisconnected() {
        downloaderService.cancel()
    }

    override fun disconnecting() {

        println("disconnecting....")
        downloaderService.cancel()
    }

    override fun addDownloaderService(downloaderService: DownloaderService) {
        this.downloaderService = downloaderService
    }



}
class FasterDownloader:DownloaderService{
    lateinit var connection: ConnectionService


    override fun download() {
        this.connection.connecting()
        println("donwloading in progresss....")
    }

    override fun resume() {
        this.connection.connecting()
        println("donwloading in progresss....")
    }

    override fun cancel() {
        println("donwload cancel....")
    }

    override fun addConnectionMonitor(connectionService: ConnectionService) {
        this.connection = connectionService
    }

}
//==========================================
//           THE MAIN APPS
//==========================================
fun main(args: Array<String>) {
    //=============== BUILDER PATTERN ===============
    var nasabah = Nasabah(
        name = "joko",
        alamatTinggal = "ngaglik",
        alamatKtp = "sleman",
        umur = "40",
        jmlAnak = "3",
        tglLahir = "06/04/80",
        tempatLahir = "sleman",
        statusRumah = "kontrak",
        namaPasangan = "sri",
        namaIbuKandung = "maryani",
        namaAliasIbuKandung = "yani",
        statusPasangan = "menikah",
        nmrKtp = "3314140604800045",// mandatory, if you delete this row will effect to line code error
        statusNikah = "menikah"// optional, you can delete it
    )
    //====== COMPOSITE PATTERN EXAMPLE ==========
    val form = QuestionForm()
    var q2 = QuestionEssay("sudah menikah ?")
    var q3 = QuestionOptional("dimana domisilimu");
    var q4 = QuestionEssay("kabupaten?");
    var q5 = QuestionOptional("siapa nama ibu?");

    q2.addSubQuestion(q3)
    q3.addSubQuestion(q4)

    form.addQuestion(q2)
    form.addQuestion(q5)

    form.showQuestion()

//============ STRATEGY PATTERN EXAMPLE =================

    var phoneByWa = WhatsappCallEngine()
    var phoneByGoogle = GoogleCallEngine()

    var sdk = SDKCallEngine()

    sdk.addCallEngine(phoneByWa)
    sdk.makeACall()
    sdk.closeThePhone()

    sdk.addCallEngine(phoneByGoogle)
    sdk.makeACall()
    sdk.closeThePhone()

//============ Coordinator Pattern Example ==========
    var androidApps = AndroidMainApps()
    androidApps.onCreated()
    androidApps.Download()
    androidApps.cancel()
    androidApps.resume()
    androidApps.airplaneMode()
}