Retrieving Java method signature from Kotlin PSI
Answered
I am currently writing a Detekt rule that reports undocumented throws in Kotlin code. Detekt uses the Kotlin's embeddable compiler (but also uses IntelliJ's Open API, that's why I'm posting there).
What I am doing is inspecting the method calls using "getResolvedCall()":
private fun enumerateCalledFunctions(function: KtNamedFunction) =
function.collectDescendantsOfType<KtCallExpression> { it.containingDeclarationForPseudocode == function }
.mapNotNull { it.getResolvedCall(this.bindingContext) }
However, when I encounter an external Java method (such as "java.io.file.Files.delete()"), I'm unable to retrieve the method's "throws".
Is there a way to do this?
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With JavaMethodDescriptior.getMethod(), you can access the PsiMethod which can be used to access such throws list with getThrowsList():
I met the same problem as well.
I'm trying to convert both Java(PsiMethod) and Kotlin(KtFunction) Psi method to JVM signature:
e.g.
I found the Java impl in https://intellij-support.jetbrains.com/hc/en-us/community/posts/360009724660-How-to-retrieve-the-signature-of-a-PsiMethod-in-the-original-JVM-format-
But no Kotlin impl for this.
Is there any solution for the Psi conversion of JVM signature for Kotlin?
You may be able to retrieve a computed Java method signature, but it won't contain the throws.
The “getThrowsList()” is only used for code gen of @Throws. Output not input. The throws list from Java methods are never loaded. See org.jetbrains.kotlin.load.java.structure.JavaMethod