CODEWITHSUNDEEP
kotlinkotlin-java-interop
gokhan
gokhan

Reputation: 667

Deprecated kotlin functions not warned on pure java project

I have Test class which has written purely with kotlin in the library project.

class Test{

  @Deprecated(message = "Use other function")
  fun testFunction(id: String): Test {
      this.testId = id
      return this
   }
}

I've deprecated testFunction() with Deprecated annotation. Btw Deprecated class is under the kotlin package. When i test this deprecated function in kotlin project works as expected(ide shows deprecated warning and strikethrough)

Example: Test(). testFunction("test")

But in the java project it doesn't show warning or strikethrough to function bye ide. When I open the declaration of deprecated function it's like below

  @Deprecated(
     message = "Use other function"
   )
  @NotNull
  public final Test testFunction(@NotNull String var1) {
     Intrinsics.checkParameterIsNotNull(var1, "id");
     this.testId = var1;
     return this;
   }

any help would be appreciated

Upvotes: 1

Views: 1432

Answers (1)

Ilya
Ilya

Reputation: 23164

In Kotlin, the functions, properties, and classes marked with kotlin.Deprecated annotation also get the Deprecated attribute in the resulting JVM bytecode. This allows Java compiler to see them as deprecated and emit the corresponding warning.

Take for example this function that is deprecated in Kotlin: https://github.com/JetBrains/kotlin/blob/v1.3.50/libraries/stdlib/common/src/generated/_Ranges.kt#L171-L175 If you try to call it from java as

kotlin.ranges.RangesKt.intRangeContains(null, 1.0);

javac compiler will report the following warning:

Warning:(55, 31) java: intRangeContains(kotlin.ranges.ClosedRange<java.lang.Integer>,double) in kotlin.ranges.RangesKt___RangesKt has been deprecated

and both IDEA and Android Studio will mark it as deprecated as well: Deprecated inspection in IDE

Upvotes: 0

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