From 9481ea995441345d7c9802db9bf96597587b1838 Mon Sep 17 00:00:00 2001
From: Alexey Belkov <alexey.belkov@jetbrains.com>
Date: Fri, 19 May 2023 16:43:08 +0400
Subject: [PATCH] [kotlin] Convert UpdateKotlinCopyright to Kotlin

^KTIJ-16705

GitOrigin-RevId: 6280f37fefe9a3ee748cfb69d0d6b1355d2c4ab0
---
 .../idea/copyright/UpdateKotlinCopyright.kt   | 78 ++++++++-----------
 1 file changed, 34 insertions(+), 44 deletions(-)

diff --git a/plugins/kotlin/copyright/src/org/jetbrains/kotlin/idea/copyright/UpdateKotlinCopyright.kt b/plugins/kotlin/copyright/src/org/jetbrains/kotlin/idea/copyright/UpdateKotlinCopyright.kt
index c794b34e89de..b9a68815a5fc 100644
--- a/plugins/kotlin/copyright/src/org/jetbrains/kotlin/idea/copyright/UpdateKotlinCopyright.kt
+++ b/plugins/kotlin/copyright/src/org/jetbrains/kotlin/idea/copyright/UpdateKotlinCopyright.kt
@@ -1,55 +1,45 @@
 // Copyright 2000-2022 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
+package org.jetbrains.kotlin.idea.copyright
 
-package org.jetbrains.kotlin.idea.copyright;
+import com.intellij.openapi.module.Module
+import com.intellij.openapi.project.Project
+import com.intellij.openapi.vfs.VirtualFile
+import com.intellij.psi.*
+import com.intellij.util.containers.TreeTraversal
+import com.maddyhome.idea.copyright.CopyrightProfile
+import com.maddyhome.idea.copyright.psi.UpdatePsiFileCopyright
+import org.jetbrains.kotlin.idea.KotlinFileType
+import org.jetbrains.kotlin.kdoc.psi.api.KDoc
+import org.jetbrains.kotlin.psi.KtDeclaration
 
-import com.intellij.openapi.module.Module;
-import com.intellij.openapi.project.Project;
-import com.intellij.openapi.vfs.VirtualFile;
-import com.intellij.psi.PsiComment;
-import com.intellij.psi.PsiFile;
-import com.intellij.psi.PsiWhiteSpace;
-import com.intellij.psi.SyntaxTraverser;
-import com.intellij.util.containers.ContainerUtil;
-import com.intellij.util.containers.TreeTraversal;
-import com.maddyhome.idea.copyright.CopyrightProfile;
-import com.maddyhome.idea.copyright.psi.UpdatePsiFileCopyright;
-import org.jetbrains.annotations.NotNull;
-import org.jetbrains.kotlin.idea.KotlinFileType;
-import org.jetbrains.kotlin.kdoc.psi.api.KDoc;
-import org.jetbrains.kotlin.psi.KtDeclaration;
+class UpdateKotlinCopyright(
+    project: Project?,
+    module: Module?,
+    root: VirtualFile?,
+    copyrightProfile: CopyrightProfile?
+) : UpdatePsiFileCopyright(project, module, root, copyrightProfile) {
 
-import java.util.List;
+    override fun accept(): Boolean =
+        file.fileType === KotlinFileType.INSTANCE
 
-public class UpdateKotlinCopyright extends UpdatePsiFileCopyright {
-    UpdateKotlinCopyright(Project project, Module module, VirtualFile root, CopyrightProfile copyrightProfile) {
-        super(project, module, root, copyrightProfile);
+    override fun scanFile() {
+        val comments = getExistentComments(file)
+        checkComments(comments.lastOrNull(), true, comments)
     }
 
-    @Override
-    protected boolean accept() {
-        return getFile().getFileType() == KotlinFileType.INSTANCE;
-    }
-
-    @Override
-    protected void scanFile() {
-        List<PsiComment> comments = getExistentComments(getFile());
-        checkComments(ContainerUtil.getLastItem(comments), true, comments);
-    }
-
-    @NotNull
-    public static List<PsiComment> getExistentComments(@NotNull PsiFile psiFile) {
-        return SyntaxTraverser.psiTraverser(psiFile)
+    companion object {
+        fun getExistentComments(psiFile: PsiFile): List<PsiComment> =
+            SyntaxTraverser.psiTraverser(psiFile)
                 .withTraversal(TreeTraversal.LEAVES_DFS)
                 .traverse()
-                .takeWhile(
-                        element ->
-                                (element instanceof PsiComment && !(element.getParent() instanceof KtDeclaration)) ||
-                                element instanceof PsiWhiteSpace ||
-                                element.getText().isEmpty() ||
-                                element.getParent() instanceof KDoc
-                )
-                .map(e -> e.getParent() instanceof KDoc ? e.getParent() : e)
-                .filter(PsiComment.class)
-                .toList();
+                .takeWhile { element: PsiElement ->
+                    (element is PsiComment && element.getParent() !is KtDeclaration) ||
+                            element is PsiWhiteSpace ||
+                            element.text.isEmpty() ||
+                            element.parent is KDoc
+                }
+                .map { element: PsiElement -> if (element.parent is KDoc) element.parent else element }
+                .filterIsInstance<PsiComment>()
+                .toList()
     }
 }