Replace getEntries with hardcoded PsiMethod in LC decompiled declaration

This adds NotNull annotation.

^KTIJ-23530 Fixed

analysis/decompiled/light-classes-for-decompiled/src/org/jetbrains/kotlin/analysis/decompiled/light/classes/KtLightClassForDecompiledDeclaration.kt

@@ -20,7 +20,9 @@ import org.jetbrains.kotlin.analysis.decompiler.psi.file.KtClsFile
 import org.jetbrains.kotlin.analyzer.KotlinModificationTrackerService
 import org.jetbrains.kotlin.asJava.classes.KotlinClassInnerStuffCache
 import org.jetbrains.kotlin.asJava.classes.LightClassesLazyCreator
+import org.jetbrains.kotlin.asJava.classes.getEnumEntriesPsiMethod
 import org.jetbrains.kotlin.asJava.classes.lazyPub
+import org.jetbrains.kotlin.asJava.isGetEntriesMethod
 import org.jetbrains.kotlin.asJava.isSyntheticValuesOrValueOfMethod
 import org.jetbrains.kotlin.load.java.structure.LightClassOriginKind
 import org.jetbrains.kotlin.psi.KtClassOrObject
@@ -159,8 +161,12 @@ open class KtLightClassForDecompiledDeclaration(
 
     private val _methods: MutableList<PsiMethod> by lazyPub {
         mutableListOf<PsiMethod>().also {
+            val isEnum = isEnum
             clsDelegate.methods.mapNotNullTo(it) { psiMethod ->
                 if (isSyntheticValuesOrValueOfMethod(psiMethod)) return@mapNotNullTo null
+                if (isEnum && isGetEntriesMethod(psiMethod)) {
+                    return@mapNotNullTo getEnumEntriesPsiMethod(this)
+                }
                 KtLightMethodForDecompiledDeclaration(
                     funDelegate = psiMethod,
                     funParent = this,

compiler/resolution.common.jvm/src/org/jetbrains/kotlin/asJava/SyntheticElementUtils.kt

@@ -25,3 +25,12 @@ fun isSyntheticValuesOrValueOfMethod(method: PsiMethod): Boolean {
 
     return false
 }
+
+fun isGetEntriesMethod(method: PsiMethod): Boolean {
+    return with(method) {
+        name == "getEntries" &&
+                parameterList.parametersCount == 0 &&
+                hasModifierProperty(PsiModifier.PUBLIC) &&
+                hasModifierProperty(PsiModifier.STATIC)
+    }
+}

compiler/testData/asJava/lightClasses/EnumClassWithEnumEntries.lib.java

@@ -1,16 +0,0 @@
-public enum MyEnumClass /* one.MyEnumClass*/ {
-  Entry;
-
-  @org.jetbrains.annotations.NotNull()
-  public static one.MyEnumClass valueOf(java.lang.String) throws java.lang.IllegalArgumentException, java.lang.NullPointerException;//  valueOf(java.lang.String)
-
-  @org.jetbrains.annotations.NotNull()
-  public static one.MyEnumClass[] values();//  values()
-
-  private  MyEnumClass();//  .ctor()
-
-  public final int doo();//  doo()
-
-  public static kotlin.enums.EnumEntries<one.MyEnumClass> getEntries();//  getEntries()
-
-}