Fixed the case of public from private class inheritance in Java

idea/idea-analysis/src/org/jetbrains/kotlin/idea/search/usagesSearch/ExpressionsOfTypeProcessor.kt

@@ -455,7 +455,7 @@ class ExpressionsOfTypeProcessor(
                 is PsiReferenceList -> { // usage in extends/implements list
                     if (parent.role == PsiReferenceList.Role.EXTENDS_LIST || parent.role == PsiReferenceList.Role.IMPLEMENTS_LIST) {
                         val psiClass = parent.parent as PsiClass
-                        if (!psiClass.isPrivateOrLocal()) {
+                        if (!psiClass.isLocal()) { // we don't filter out private classes because we can inherit public class from private in Java
                             addClassToProcess(psiClass)
                         }
                     }
@@ -628,9 +628,11 @@ class ExpressionsOfTypeProcessor(
     }
 
     private fun PsiModifierListOwner.isPrivateOrLocal(): Boolean {
-        return hasModifierProperty(PsiModifier.PRIVATE) || parents.any { it is PsiCodeBlock }
+        return hasModifierProperty(PsiModifier.PRIVATE) || isLocal()
     }
 
+    private fun PsiModifierListOwner.isLocal() = parents.any { it is PsiCodeBlock }
+
     private fun PsiElement.isOperatorExpensiveToSearch(): Boolean {
         when (this) {
             is KtFunction -> {

idea/testData/findUsages/kotlin/conventions/components/dataClass.1.kt

@@ -24,4 +24,5 @@ fun listOfA() = listOf<A>(A(1, "", ""))
 fun test2(p1: JavaClass2, p2: JavaClass3) {
     val (x1, y1) = p1[0]
     val (x2, y2) = p2[0]
+    val (x3, y3) = JavaClass4.getNested()[0]
 }

idea/testData/findUsages/kotlin/conventions/components/dataClass.3.java

@@ -0,0 +1,14 @@
+import pack.A;
+
+import java.util.List;
+
+public class JavaClass4 {
+    private interface NestedPrivate extends List<A> {
+    }
+
+    public interface NestedPublic extends NestedPrivate {
+    }
+
+    public static NestedPublic getNested() {
+    }
+}

idea/testData/findUsages/kotlin/conventions/components/dataClass.log

@@ -9,6 +9,7 @@ Checked type of x1
 Checked type of x2
 Checked type of x2
 Checked type of x3
+Checked type of x3
 Checked type of x4
 Checked type of x5
 Checked type of y
@@ -17,6 +18,7 @@ Checked type of y1
 Checked type of y2
 Checked type of y2
 Checked type of y3
+Checked type of y3
 Checked type of y4
 Checked type of y5
 Checked type of z
@@ -30,12 +32,16 @@ Resolved (x1, y1)
 Resolved (x1, y1, z1)
 Resolved (x2, y2)
 Resolved (x2, y2, z2)
+Resolved (x3, y3)
 Resolved (x3, y3, z3)
 Resolved (x4, y4, z4)
 Resolved (x5, y5, z5)
 Searched references to JavaClass.getA() in Kotlin files
 Searched references to JavaClass2
 Searched references to JavaClass3
+Searched references to JavaClass4.NestedPrivate
+Searched references to JavaClass4.NestedPublic
+Searched references to JavaClass4.getNested() in Kotlin files
 Searched references to a in Kotlin files
 Searched references to f() in Kotlin files
 Searched references to g() in Kotlin files

idea/testData/findUsages/kotlin/conventions/components/dataClass.results.txt

@@ -7,6 +7,7 @@
 [dataClass.1.kt] Value read 15 val (x5, y5, z5) = javaClass.getA()[0]
 [dataClass.1.kt] Value read 25 val (x1, y1) = p1[0]
 [dataClass.1.kt] Value read 26 val (x2, y2) = p2[0]
+[dataClass.1.kt] Value read 27 val (x3, y3) = JavaClass4.getNested()[0]
 [dataClass.1.kt] Value read 5 a.n
 [dataClass.1.kt] Value read 8 val (x, y, z) = a
 [dataClass.1.kt] Value read 9 val (x1, y1, z1) = f()