Make Kotlin light class more like PsiAnonymousClassImpl

Avoid delegating to cls delegate in more places

compiler/light-classes/src/org/jetbrains/kotlin/asJava/KtLightClassForAnonymousDeclaration.kt

@@ -18,7 +18,6 @@ package org.jetbrains.kotlin.asJava
 
 import com.intellij.openapi.diagnostic.Logger
 import com.intellij.psi.*
-import com.intellij.psi.impl.InheritanceImplUtil
 import com.intellij.psi.search.GlobalSearchScope
 import com.intellij.reference.SoftReference
 import org.jetbrains.kotlin.name.FqName
@@ -35,10 +34,6 @@ internal open class KtLightClassForAnonymousDeclaration(name: FqName,
         return JavaPsiFacade.getElementFactory(classOrObject.project).createReferenceElementByType(baseClassType)
     }
 
-    override fun getContainingClass(): PsiClass? {
-        return delegate.containingClass
-    }
-
     private val firstSupertypeFQName: String
         get() {
             val descriptor = getDescriptor() ?: return CommonClassNames.JAVA_LANG_OBJECT
@@ -104,6 +99,18 @@ internal open class KtLightClassForAnonymousDeclaration(name: FqName,
         return classOrObject.hashCode()
     }
 
+    override fun getNameIdentifier() = null
+    override fun getQualifiedName(): String? = null
+    override fun getModifierList(): PsiModifierList? = null
+    override fun hasModifierProperty(name: String): Boolean = name == PsiModifier.FINAL
+    override fun getExtendsList(): PsiReferenceList? = null
+    override fun getImplementsList(): PsiReferenceList? = null
+    override fun getContainingClass(): PsiClass? = null
+    override fun isInterface() = false
+    override fun isAnnotationType() = false
+    override fun getTypeParameterList() = null
+    override fun isEnum() = false
+
     companion object {
         private val LOG = Logger.getInstance(KtLightClassForAnonymousDeclaration::class.java)
     }

compiler/light-classes/src/org/jetbrains/kotlin/asJava/KtLightClassForExplicitDeclaration.kt

@@ -254,7 +254,7 @@ open class KtLightClassForExplicitDeclaration(
 
     override fun getName(): String? = classFqName.shortName().asString()
 
-    override fun getQualifiedName(): String = classFqName.asString()
+    override fun getQualifiedName(): String? = classFqName.asString()
 
     private val _modifierList : PsiModifierList by lazy(LazyThreadSafetyMode.PUBLICATION) {
         object : KtLightModifierListWithExplicitModifiers(this@KtLightClassForExplicitDeclaration, computeModifiers()) {
@@ -263,7 +263,7 @@ open class KtLightClassForExplicitDeclaration(
         }
     }
 
-    override fun getModifierList(): PsiModifierList = _modifierList
+    override fun getModifierList(): PsiModifierList? = _modifierList
 
     protected open fun computeModifiers(): Array<String> {
         val psiModifiers = hashSetOf<String>()
@@ -306,7 +306,7 @@ open class KtLightClassForExplicitDeclaration(
 
     private fun isSealed(): Boolean = classOrObject.hasModifier(SEALED_KEYWORD)
 
-    override fun hasModifierProperty(@NonNls name: String): Boolean = modifierList.hasModifierProperty(name)
+    override fun hasModifierProperty(@NonNls name: String): Boolean = modifierList?.hasModifierProperty(name) ?: false
 
     override fun isDeprecated(): Boolean {
         val jetModifierList = classOrObject.modifierList ?: return false
@@ -392,7 +392,7 @@ open class KtLightClassForExplicitDeclaration(
     override fun getElementType(): IStubElementType<out StubElement<*>, *>? = classOrObject.elementType
     override fun getStub(): KotlinClassOrObjectStub<out KtClassOrObject>? = classOrObject.stub
 
-    override fun getNameIdentifier() = lightIdentifier
+    override fun getNameIdentifier(): KtLightIdentifier? = lightIdentifier
 
     companion object {
         private val JAVA_API_STUB = Key.create<CachedValue<WithFileStubAndExtraDiagnostics>>("JAVA_API_STUB")