SONARKT-400 Migrate InterfaceCouldBeFunctionalCheck to kotlin-analysis-api

Co-authored-by: Marharyta Nedzelska <[email protected]>
Co-authored-by: Evgeny Mandrikov <[email protected]>

Author: leveretka

sonar-kotlin-api/src/main/java/org/sonarsource/kotlin/api/checks/ApiExtensions.kt

@@ -598,6 +598,8 @@ fun KtBinaryExpression.isPlus() =
 fun PsiElement?.getVariableType(bindingContext: BindingContext) =
     this?.let { bindingContext[BindingContext.VARIABLE, it]?.type }
 
+/** Use [org.jetbrains.kotlin.analysis.api.components.KaTypeProvider.type] instead. */
+@Deprecated("use kotlin-analysis-api instead")
 fun KtTypeReference?.getType(bindingContext: BindingContext): KotlinType? =
     this?.let { bindingContext[BindingContext.TYPE, it] }
 

sonar-kotlin-checks/src/main/java/org/sonarsource/kotlin/checks/InterfaceCouldBeFunctionalCheck.kt

@@ -16,19 +16,18 @@
  */
 package org.sonarsource.kotlin.checks
 
-import org.jetbrains.kotlin.js.descriptorUtils.getKotlinTypeFqName
-import org.jetbrains.kotlin.psi.KtAnnotationEntry
+import org.jetbrains.kotlin.name.ClassId
 import org.jetbrains.kotlin.psi.KtClass
 import org.jetbrains.kotlin.psi.KtNamedFunction
 import org.jetbrains.kotlin.psi.KtProperty
 import org.sonar.check.Rule
 import org.sonarsource.kotlin.api.checks.AbstractCheck
-import org.sonarsource.kotlin.api.checks.getType
 import org.sonarsource.kotlin.api.frontend.KotlinFileContext
+import org.sonarsource.kotlin.api.visiting.withKaSession
 
-@org.sonarsource.kotlin.api.frontend.K1only
 @Rule(key = "S6517")
 class InterfaceCouldBeFunctionalCheck : AbstractCheck() {
+    private val functionalInterClassId = ClassId.fromString("java/lang/FunctionalInterface")
 
     override fun visitClass(klass: KtClass, context: KotlinFileContext) {
         checkFunctionalInterface(klass, context)
@@ -46,9 +45,9 @@ class InterfaceCouldBeFunctionalCheck : AbstractCheck() {
         }
     }
 
-    private fun checkFunctionalInterfaceAnnotation(klass: KtClass, context: KotlinFileContext) {
+    private fun checkFunctionalInterfaceAnnotation(klass: KtClass, context: KotlinFileContext) = withKaSession {
         klass.annotationEntries.forEach {
-            if (isFunctionalInterfaceAnnotation(it, context)) {
+            if (it.typeReference?.type?.isClassType(functionalInterClassId) == true) {
                 context.reportIssue(it, """"@FunctionalInterface" annotation has no effect in Kotlin""")
             }
         }
@@ -65,8 +64,3 @@ private fun hasExactlyOneFunctionAndNoProperties(klass: KtClass): Boolean {
         it !is KtProperty && (it !is KtNamedFunction || functionCount++ == 0)
     } && functionCount > 0
 }
-
-private fun isFunctionalInterfaceAnnotation(annotation: KtAnnotationEntry, context: KotlinFileContext): Boolean {
-    val annotationType = annotation.typeReference.getType(context.bindingContext)
-    return (annotationType?.getKotlinTypeFqName(false) == "java.lang.FunctionalInterface")
-}