How to deal with common functionality for hundreds of data types? (CRUD app with 200 very similar entities without inheritance) I'm working on a project (basically a CRUD application) which has over 200 database entities, where each one of them has a few common attributes (id, name...) and lots of other attributes and references to other entities. Some are common for majority of entities, some are not. (For example: var status: Status? is present in every entity, except the Status itself.) I do not use inheritance for entities, because I would need multiple-inheritance to share these attributes. To load these...

Ignore loading eager one-to-one hibernate I have a ProductGroup, Product and DetailProduct with the following: class ProductGroup { @OneToMany(mappedBy = "productGroup", fetch = FetchType.LAZY, cascade = [CascadeType.PERSIST], orphanRemoval = true) @JsonIgnore open var product: MutableList = mutableListOf() } class Product { @ManyToOne(fetch = FetchType.LAZY, cascade = [CascadeType.PERSIST]) @JoinColumn(name = "ID_PRODUCT_GROUP", referencedColumnName = "id") @JsonIgnore open var productGroup:...

How to use an interface for REST API definition in Quarkus? I want to define a REST API using JAX RS against an interface, and then implement this interface in both the server and any number of clients. Quarkus doesn't seem to support this unless you duplicate parts of the API definition in the implementations. Eg, it should be possible to do the following: @Path("/hello") interface GreetingApi { @GET @Produces(MediaType.TEXT_PLAIN) @Path("/greeting/{name}") fun greeting(@PathParam("name") name: String): String? } class...

Shadow jar missing common java classes I'm packaging a shadow jar of my app. The app uses kotlin and some external dependencies. All dependencies are in my jar but i get the following exception during runtime: java.lang.NoSuchMethodError: java.util.Optional.isEmpty()Z The Z at the end is always there; I don't where it comes from. I checked multiple example of build.gradle files and mine seems to be good. buildscript { repositories { jcenter() } dependencies { classpath...

My URL in Kotlin has an extra & at the end of it private val BASE_URL = "https://itunes.apple.com/search?" private var iTunesMap = mutableMapOf("term" to "parameter1", "media" to "parameter2") fun URL.addParameters(map:Map) : String { var newURL = BASE_URL for(parameter in iTunesMap.iterator()) { newURL += parameter.key + "=" + parameter.value + "&" } return newURL } I am ending up with a & at the end of the URL. How do I prevent this from happening?

SqlCipher database opens, but 0 tables shown I created a simple database and inserted values. I'M sure the data exist in database because when I opened the app, my saved data shown. I use room and SQLCipher. I exported my .db file and opened it with db browser for sqlite. It asks me passphrase, I entered it correctly, it accepts my passphrase and opened db browser correctly. However, no data exist for browsing, it shows 0 table. Why can't I see my tables? How to see my data in human-readable text format ? <a...

The Viewmodel is not destroyed even when the oncleared is called there is a Nested graph inside them two fragments (A,B) with 3 viewmodels 1 sharedviewmodel and 2 individual the individual viewmodel is not getting destroyed even when the findNavController().popBackStack() is called which inturn calls onCleared of viewmodel this is initialization inside one of the fragment B'sVm = ViewModelProvider(this).get(B'sViewModel::class.java) There is a recyclerview inside the B's fragment which take the list from viewmodel(through binding) (after network call)...

Binding и SetOnClickListner в Kotlin Необходимо сделать следующее: с помощью binding найти кнопку, которая будет отвечать за сохранение данных, введенных в EditText, используя обработчик setOnClickListner Я примерное понимаю как это делать, но все равно затрудняюсь как это прописать.

Using Hilt @IntallIn for a dagger-2 module which has static provides method While doing a dagger-2 to hilt migration, got this error for a module Error: FooModule.Companion is listed as a module, but it is a companion object class. Add @Module to the enclosing class and reference that instead. Before Hilt @Module abstract class FooModule { @Binds @FooScope abstract fun bindsManager(impl: FooManagerImpl): FooManager @Module companion object { @Provides @FooScope @JvmStatic fun providesConfig(prefs: SharedPreferences): FooConfig =...

Paging 3.0 list with new params in Kotlin I have the following code: val history: Flow = Pager(PagingConfig(pageSize = 10)) { PaginationBaseDataSource(apiService) }.flow .cachedIn(viewModelScope) This currently is displaying a list of items without any additional params. This works Ok... But now I wish to query this list based in certain params that the user can change in frontend, let´s say I wish to add the parameter 3 as a query. val history: Flow = Pager(PagingConfig(pageSize = 10)) {...

FirebaseRecyclerAdapter shows one item instead of an array My recycler view is only showing the last item in my data. I want to show the all of it instead. Data structure: { "messages" : { "-MLLiVKuT5anOHM_6x8T" : { "senderId" : "rebecca@example.com", "senderName" : "Rebecca", "text" : "It happens to be where Josh lives", "type" : "OUTGOING" }, "-MLLiYGcGhPv3E8xdbyh" : { "senderId" : "rebecca@example.com", "senderName" : "Rebecca", "text" : "But that's not why I'm here", "type" :...

how to count an array data in kotlin i would like to count an arraylist in kotlin. What I have is something along the lines of : val names = listOf("apple", "apple", "orange", "orange", "banana", "pears", "grape", "apricots") Where the output I want is something to be like this : apple : 2 orange : 2 banana : 1 pears : 1 grape : 1 apricots : 1 can you helped me, thanks

Kotlin code to check if string contains any of words from array I have writtent following code to check if string contains any of of the words. fun String.isValidUrl(): Boolean { return contains("http://") || contains("https://") || contains("www.") } How can I simplify this statement in kotlin.

Is there a maximum line length for KDoc? In JavaDoc, lines must be 80 characters or less (not including the not-shown parts of expressions like {@code} and {@link}). Is there a line length limit to KDoc? It's certainly not 80, as I've found lines in stdlib up to 112 characters long. Does anyone know?

OnBackPressed Activity to MainActivity Fragment I have Requirement to OnBackPressed From Activity to MainActivity Fragment. What I have Done to achieve this is Implement a Simple super.onbackPressed. This super.onbackPressed Bring Activity to Previous Activity. I have Also done this, But My Requiremts does not matched to this, i.e OnBackpressed Activity to MainActivity Fragment.. override fun onBackPressed() { val builder: AlertDialog.Builder = AlertDialog.Builder(this) builder.setMessage(getString(R.string.doyouwanttoclose))...

How to figure out the thread pool of thread [Kotlin]? Consider the following piece of code: suspend fun childTaskExecutor() { GlobalScope.future(Dispatchers.Default) { val currentThread = Thread.currentThread() logger.info("[childTaskExecutor] running on ${currentThread.name} group : ${currentThread.threadGroup}") }.awaitOrNull() } When I run this the output is: [childTaskExecutor] running on DefaultDispatcher-worker-9 group : java.lang.ThreadGroup[name=main,maxpri=10] When I change the context to Dispatchers.IO the...

pdfVIew doesn't work on my kotlin development environment I put some pdf files to test pdf loading from external storage and made a code following : This code made a log : D/1: 112:/storage/emulated/0/Download/edge.pdf 11:/storage/emulated/0/Download/edge.pdf Judging from the log I don't think that I made any mistake, but the pdfview did not work, showing the white screen . Please somebody tell me where I made mistake. I really want to load a file, or make a list of files...

Not including data type in variable name In a PR I got some suggestions to rename my variables. Suggestions were made to fi. concat *MutableLiveData. private val _state = MutableLiveData() val state: LiveData get() = _state My two variables. It's an Android ViewModel. After the suggestions I agree that perhaps uiState would be beter. However, 2 suggestions were stateMutableLiveData and stateObservable. I don't like those names, but my problem is that I can't think of a valid reason to not use their suggestions, other than:...

Resources$NotFoundException when launching SplashScreen My application has a SplashScreen implemented as a separate activity. I've been getting few crash reports on Google Play Console. Here is the stack trace: java.lang.RuntimeException: at android.app.ActivityThread.performLaunchActivity (ActivityThread.java:3253) at android.app.ActivityThread.handleLaunchActivity (ActivityThread.java:3349) at android.app.ActivityThread.access$1100 (ActivityThread.java:223) at android.app.ActivityThread$H.handleMessage (ActivityThread.java:1794) at...

Excluding entities from Swagger model We are using Swagger to model our API with Spring annotations: @Operation(summary = "Creates a post for given user.") @PostMapping("/post") open fun createPost( @RequestParam("userId") user: User, ) The issue we are having is that Swagger does not know there is a logic behind and we are only passing userId: Long for which the user is loaded by Hibernate. The model of User contains several @OneToOne, @ManyToOne, @OneToMany relations to other entities and Swagger builds the model of User...

Parcelable objetcs provided to Fragments via their argurments are NOT recreated ... Meaning you work with the same current pointer to the same object in memory, no matter what. Have you noticed the same? Working with the debugger to solve an unrelated problem, I was quite surprised to notice that my parcelable objects have the same instance number before creating a Fragment and when manipulating it within said Fragment. I am using Kotlin @Parcelize on data classes inheriting Parcelable and looking at its documentation it simply says that it will generate the required...

inflate recyclerview from fargment I am trying to save a bundle of the fragment when its destroyed, but I don't know how to save the data inside the recyclerview, every item of the recyclerview has a radioGroup, how do I get and set the checked radio button from the fragment? this is how I make my bundle: override fun onDestroyView() { super.onDestroyView() sharedViewModel.sharedBundle.value = bundleOf( "car_number" to binding.etCarNumber.text, "car_type" to binding.etCarType.text...

How to make the text lines end at the same position in Android Studio? I am using Android Studio (Kotlin) and I want to make the text organize and beautiful like this: Organize Paragraph Each line starts and ends in the same position because mine looks like this: Unorganize Paragraph

Force reconstruct Fragment and attach ViewPager2 onTabSelected I've tried to use notifyDataSetChanged and notifyItemChanged, but my subFragment does not even recall onViewCreated when tab is reselected. I want to refresh entire subfragment when 2nd tab is selected MainFragment : onViewCreated() private fun setupViewPager2() { vp__viewpager?.adapter = ListingViewPagerAdapter( this, 2 ) vp__viewpager?.isUserInputEnabled = false tl__tab_layout?.addOnTabSelectedListener(object :...

How to create different app bar styles in single activity application In my app I have a requirement to use different styles of app bar on different fragment. Currently what I have is a single activity application, where the app bar sits in activity_main.xml, and I just inflating different menus in different fragment. I probably can remove the app bar from activity and include this in each fragment layout, but I think in big apps is somewhat repeating code(?) How can I inflate specific app bar styles(in my case, collapsing app bar) in specific fragment while...

How to remove the space before the first letter in a TextView So I have 3 vertical aligned TextViews. The second one has a larger font size. Now, if the second TextView holds a string starting with e.g. a 'B' it looks like the View is indented: Here's my XML layout: And here's the corresponding styles.xml file: @font/opensans_regular @font/opensans_regular 48sp @font/opensans_regular...

How to make the first two item from recycler view exact size of cardview I've got issues. I have Recycler View which contain 4 Datas in Card Ciew instead of show 4 items i want my recycler view show 2 items with rest of items on the other side like this is it possible to set the card view's size twice as item size ? or should i change the LayoutManager ? Any suggestion ? Thanks in advance

SQLiteDatabase.java line 227 net.sqlcipher.database.SQLiteDatabase$1.loadLibraries Fatal Exception: java.lang.UnsatisfiedLinkError dalvik.system.PathClassLoader[DexPathList[[zip file "/data/app/com.ekincare-1/base.apk"],nativeLibraryDirectories=[/data/app/com.ekincare-1/lib/x86, /vendor/lib, /system/lib]]] couldn't find "libsqlcipher.so" java.lang.Runtime.loadLibrary (Runtime.java:367) java.lang.System.loadLibrary (System.java:1076) net.sqlcipher.database.SQLiteDatabase$1.loadLibraries (SQLiteDatabase.java:227) net.sqlcipher.database.SQLiteDatabase.loadLibs...

Kotlin Return Expression I have google this and searched here but I have hit a wall. I have a function which is to return an Int. It tells me I need to add another return expression to the overall function but I can't figure out where it needs to go to be done correctly, i have tried a few variations including adding the same return I use within the if statements but before the closing tag which throws up errors within the rest of the code I call the function like this; var ans = GetQuestion(1) fun...

Kotlin : conditional deleting from s list of object I have a scenario where I am suppose to delete objects form a list of objects, but only if: a given property of an object is NULL and occurs in the list more than once To clarify with an example: A("b", null) should be deleted, because object with property name="b" occurs in A("b", 3) A("c", null) should remain, because it object with property name="c" occurs in the listonly once A("d", null) one occurrence should be deleted and one should stay Thank you in advance. class A( val name:...