Kotlin +spring boot post request default boolean value Currently I am working on spring boot restful web app with Kotlin. I want to add a boolean flag to the body of a post request and its default value is true if is not passed in DTO: data class PersonDTO( @field:NotNull val name: String, val enabledProfile: Boolean = true // setting this to true is not working ) How can I set the flag enabledProfile to true by default?

Understanding one usage of "in" keyword in Kotlin I'm trying to understand Kotlin take of generics especially with in and out keywords. I've written this simple pieces to hopefully illustrate my point of confusion. This is the method that looks and works OK; Here, IDE gives a hint saying that the type of the item the for loop is iterating over is a Shape. This is good. Another version of the method above that doesn't seem quite right at first glance (since it's...

How to use Single operator of Rxjava Kotlin I have a ViewModel class that I want to emit the text to my TextView Whenever the state is changed I emit that, but when I debugged the code, it shows that t.onSuccess(state) has been never called. ViewModel func fun getState() : Single?{ var single: Single? = null chat.addListener(object : ChatListener { override fun onChatState(state: String?) { super.onChatState(state) single = Single.create { t -> t.onSuccess(state)...

Referring to Spring-boot application from kotlin project I have set up a multi-module gradle project in kotlin and spring-boot. spring-app |-app |-integration-tests //in app project @SpringBootApplication class Application fun main(args: Array) { runApplication(*args) } I am trying to write integration test for this application in integration-tests project. @RunWith(SpringRunner::class) @SpringBootTest(classes = [Application::class], webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT) class ApplicationTests {...} and I have...

Kotlin testing authentication to /actuator api I have a ActuatorSecurity class which I use for authentication for /actuator actions. package com.netapp.qronicle.config import org.springframework.beans.factory.annotation.Value import org.springframework.boot.actuate.autoconfigure.security.servlet.EndpointRequest import org.springframework.context.annotation.Bean import org.springframework.context.annotation.Configuration import org.springframework.security.authentication.AuthenticationManager import...

Kotlin reflection change instance and all members that use the instance We are using reflection to enable our tests to be started in different environments. A typical test would look like this: class TestClass { val environment: Environment = generateEnvironment("jUnit") val path: String = environment.path //Do test stuff } We are using reflection like this: class PostgresqlTest{ val classList: List = listOf(TestClass::class) val postgresEnv = generateEnvironment("postgres") @TestFactory fun generateTests(): List = classList.flatMap {...

Kotlin like selector in Java I have this code in Kotlin, how do I write it Java? typealias ResolutionSelector = Iterable.() -> Resolution? /** * @return Selector function which always provides the biggest resolution. */ fun highestResolution(): ResolutionSelector = { maxBy(Resolution::area) }

How to access array elements from derrived class I have classes: class A { MutableList array1 = mutableListOf() } class B { } class Ba : B { MutableList array2 = mutableListOf() } class C { var name: String } In my main function i did: val itemA = A() val itemBa = Ba() itemBa.array2.add(C("name")) itemA.array1.add(ItemBa) for(arr1 in itemA.array1) for(arr2el in arr1.array2) print(arr2el.name) But when i try to print elements from array2 through itemA element i get error Unresolved Reference, as if i can't get array2. But...

Get a photo associated with the current user I am trying to return a user a photo from Firebase node to the respected authenticated user. I have the Firebase set up so that when you register it, it creates a child record for the user, stores the UID there and also stores the image URL. As well as storing the image in Firebase storage. I can get back the users email address they registered with but I cannot get the information related to the authenticated user in Firebase. I want to return the users photo as a profile image qhen they...

Android: Repeat Function untill Button is pressed So I want that the function "start()" is repeated every Second till I press a Button. The function reads a JSON File and notifies a Plotter to Print a Line graph with the help of GraphView Lib. I tried this but the App keeps Crashing: private val timer = Timer("schedule", true) timer.scheduleAtFixedRate(1000,1000) { start() }

"No main manifest attribute" when creating Kotlin jar using IntelliJ IDEA When creating a jar from my Kotlin code and running it, it says "No main manifest attribute". When looking at the manifest.mf, it has this content: Manifest-Version: 1.0 When looking at the file in the source, it has this content: Manifest-Version: 1.0 Main-Class: MyMainClass When manually copying the source manifest to the jar, it runs perfectly.

Are Enum classes in Kotlin "expensive" for Android as Java? Are Enum classes in Kotlin "expensive" for Android as Java?. Is it still stand to use @IntDefs or @StringDefs in Kotlin?. When I decompile Kotlin Enum class to Java class, there still used Java Enums in the low level, which are not recommended for use in Android Development, and this made me think about this.

actionBar in fragment using androidx I just want to get actionBar in a fragment and I am using Kotlin language and AndroidX. this is my code: import androidx.appcompat.app.ActionBar import androidx.fragment.app.Fragment class TestFragment : Fragment() { fun getActiobar() : ActionBar { return activity.actionBar } } but I am getting this error: Type mismatch: inferred type is android.app.ActionBar! but androidx.appcompat.app.ActionBar was expected.

compare numbers and save them in a array in Kotlin 2 part question First part - I wanted to ask the user to give a number and then create an array with as many positions as the number introduced, how can i do this? Second Part - The array is to be filled with random numbers but i don't want duplicate numbers . This is my code and it keeps registering duplicate numbers var A = intArrayOf(0,0,0,0,0,0) for (i in 0..A.size - 1) { val rnd = (0..10).random() for (j in 0..A.size-1) { if (rnd == A[j]){ break }...

basic coroutine network call in a library I'm just reading and learning about coroutines in Kotlin to use in a small library for fun/learning purposes. In the documentation, you can do something like GlobalScope.launch { } So in my method, fun myMethod() { GlobalScope.launch { // do some networking code } } Is it best practice to use GlobalScope to launch a coroutine for a library? In the docs it says Application code usually should use application-defined CoroutineScope, using async or launch on the...

Variable from kubernetes yaml causes: Could not resolve placeholder 'ACTUATOR_PASSWORD' in value "${ACTUATOR_PASSWORD}" When I run my application from IntelliJ, I get a warning / error though application builds fine and runs all tests through, is this something that I should ignore, or can this be handled fixed? Kubernetes secret is used to create a random password, therefor I have a placeholder for that particular variable. 2019-02-26 194529.600 INFO 38918 --- [ main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default' 2019-02-26...

LibGDX Box2d Calculating Linear Impulse Vector from Position of 2 Bodies I am trying to simulate one circle applying impulse to another according to their positions of their body like this: I am doing this to calculate impulse vector: var impulseVector:Vector2 = ball.body.worldCenter.sub(player.body.worldCenter) and applying like this: ball.body.applyLinearImpulse( impulseVector, ball.body.worldCenter,...

Targeting the first and second values in a Class<Int, Int> In Kotlin's Pair data class it takes 2 values: Pair and those values are targeted via first and second named properties: Pair(first: A, second: B) However, how are the first and properties targeted if these properties didn't exist (e.g. for other classes with two parameters OtherClass? - Is there another way to target them?) PS: Why is Pair a data class and not a regular class?

Flowable inside of ViewHolder I have been started programming in android again and since it has been changed a lot in the last 4 years I got a little bit confused. I am trying to load my data from the server asynchronously with RxJava and Flowable inside of my ViewHolder. I am using a third-party library to handle my views in adaptor MultiViewAdaptor. Here is my code in my Binder class FooBinder : ItemBinder() { @Inject...

Edit SharedPreferences tags in Android using Kotlin I'm making an app that takes both a query and a tag. Each time someone presses the save button it creates a new button titled with the tag containing the query. There's an option to edit the query and save it, but I'm also trying to edit the tag name and save it. Each time I try to edit the button's name I get a new button instead of changing the name. I'm using SharedPreferences to store this information and I'm trying to edit it but I'm still unsure if it contains the exact information...

how to keep the design while using different languages I'm making an android supporting one language only.. it's right to left language, the problem is that when I switch language of my phone the design of the app changes like image view or text view they go to the other side.. I want to keep the design the same what ever the mobile language was.. is there any way to do this?

GraphView: resetData() with same Data Is it possible to use resetData() when all DataPoints are the same? I currently get an Error that the X values are not in the right Order, but I use the same DataPoints as before. So they are in Order and even once plotted without an Error. //Blue Cones for (i in sortedBlueCones) { var x: Double = sortedBlueCones.get(blueIterator).xCoordinate var y: Double = sortedBlueCones.get(blueIterator).yCoordinate var dataPoint = DataPoint(x,...

Get value from annotation failed This is annotation definition: @Target(AnnotationTarget.PROPERTY) @Retention(AnnotationRetention.RUNTIME) @MustBeDocumented annotation class MyAnno(val desc: String, val comment: String) { } And below is where the MyAnno used: class MyAnnoUser { @MyAnno(desc = "name", comment = "name comment") lateinit var name: String @MyAnno(desc = "age", comment = "age comment") var age: Int = 0 @MyAnno(desc = "money", comment = "money comment") var money: Double = 0.0...

RecyclerView load 10000+ image from backend api I get json data in my back-end api. [ { id: "is random" image: "my url" }, ......10000+ ] My id is random number without continuity. Each json object has image. I call api and put data in RecyclerView . But when RecyclerView is displayed, it will get stuck or crash. I use Glide load image. GlideApp.with(context).load(myUrl).placeholder(myPlaceholder).into(myUI) How can I let RecyclerView read it smoothly? Can I use Paging Library to let it display five data at the...

Alternative to kotlin's `reduce` operation in rust I'm a new rustacian and encountered this problem in a competitive programming problem: nums is a vector of integers (length n) ops is a vector of strings containing + and - (length n-1) It can be solved with reduce operation in kotlin like this: val op_iter = ops.iterator(); nums.reduce {a, b -> when (op_iter.next()) { "+" -> a+b "-" -> a-b else -> throw Exception() } } But it looks like rust vectors do not have a reduce method. How would you achieve...

Corda flow test missing -javaagent I'm completing the corda training module for flow tests, but I keep getting this error: java.lang.IllegalStateException: Missing the '-javaagent' JVM argument. Make sure you run the tests with the Quasar java agent attached to your JVM. See https://docs.corda.net/troubleshooting.html - 'Fiber classes not instrumented' for more details. Anyone know how to fix this? I already tried adding -javaagent:..lib/quasar.jar to the VM and it didn't work

How to develop an android application separating data and view layer I am new to Android development. have an android application in koltin wherein I have to make an http post request to get a list of data as response. I have done that in activity class as follows. MainActivity.kt class MainActivity : AppCompatActivity(), { private fun getAppList() { var builder = AlertDialog.Builder(this@MainActivity) builder.setTitle("App Response") doAsync { sslCertficate.disableSSLCertificateChecking() var headers =...

Unit Testing - Wiremock verify failing with connection error I'm testing a spring-boot application and using wiremock stubs to mock external API. In one test case I want to make sure that my stub gets called exactly once but it's failing with connection error. My Test File: @SpringBootTest @AutoConfigureWebTestClient @ActiveProfiles("test") class ControllerTest { @Autowired private lateinit var webClient: WebTestClient private lateinit var wireMockServer: WireMockServer @BeforeEach fun setup() { wireMockServer =...

OnActivityResult not getting called in Fragment from Activity My flow of activity is like this. In Fragment A, it allow user to capture image, and the image will be displayed on Activity B for user to do some editing. Fragment A mImageListAdapter.mAddImageClickListener = object : ImageListAdapter.AddImageClickListener { override fun addImageClicked() { val options = arrayOf("Take Photo", "Choose From Gallery", "Cancel") val builder = android.support.v7.app.AlertDialog.Builder(activity)...

Show image on preview before uploading to server in android I'm working with images in kotlin and I'm trying to upload an image to server using retrofit. But before uploading I wanted to show image on preview or to crop or resize. I've been reading about how to do this but still didn't find the right solution. here is my code until this moment fun chooseImageFromGallery() { val galleryIntent = Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI) startActivityForResult(galleryIntent, GALLERY) } private fun...