Cache more stuff in reflection implementation

Delete KAnnotatedElementImpl because it's not possible to make it a class (its
subclasses have other classes in supertypes) to cache annotations in a property

core/reflection.jvm/src/kotlin/reflect/jvm/internal/KAnnotatedElementImpl.kt

@@ -1,41 +0,0 @@
-/*
- * Copyright 2010-2015 JetBrains s.r.o.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package kotlin.reflect.jvm.internal
-
-import org.jetbrains.kotlin.descriptors.annotations.Annotated
-import org.jetbrains.kotlin.load.java.components.RuntimeSourceElementFactory
-import org.jetbrains.kotlin.load.java.structure.reflect.ReflectJavaAnnotation
-import org.jetbrains.kotlin.load.kotlin.reflect.ReflectAnnotationSource
-import kotlin.reflect.KAnnotatedElement
-
-internal interface KAnnotatedElementImpl : KAnnotatedElement {
-    val annotated: Annotated
-
-    override val annotations: List<Annotation>
-        get() = annotated.annotations.mapNotNull {
-            val source = it.source
-            when (source) {
-                is ReflectAnnotationSource -> {
-                    source.annotation
-                }
-                is RuntimeSourceElementFactory.RuntimeSourceElement -> {
-                    (source.javaElement as? ReflectJavaAnnotation)?.annotation
-                }
-                else -> null
-            }
-        }
-}

core/reflection.jvm/src/kotlin/reflect/jvm/internal/KCallableImpl.kt

@@ -18,13 +18,12 @@ package kotlin.reflect.jvm.internal
 
 import org.jetbrains.kotlin.descriptors.CallableMemberDescriptor
 import org.jetbrains.kotlin.descriptors.Modality
-import org.jetbrains.kotlin.descriptors.annotations.Annotated
 import java.lang.reflect.Type
 import java.util.*
 import kotlin.reflect.*
 import kotlin.reflect.jvm.javaType
 
-internal abstract class KCallableImpl<out R> : KCallable<R>, KAnnotatedElementImpl {
+internal abstract class KCallableImpl<out R> : KCallable<R> {
     abstract val descriptor: CallableMemberDescriptor
 
     abstract val caller: FunctionCaller<*>
@@ -33,10 +32,11 @@ internal abstract class KCallableImpl<out R> : KCallable<R>, KAnnotatedElementIm
 
     abstract val container: KDeclarationContainerImpl
 
-    override val annotated: Annotated get() = descriptor
+    private val annotations_ = ReflectProperties.lazySoft { descriptor.computeAnnotations() }
 
-    override val parameters: List<KParameter>
+    override val annotations: List<Annotation> get() = annotations_()
-        get() {
+
+    private val parameters_ = ReflectProperties.lazySoft {
         val descriptor = descriptor
         val result = ArrayList<KParameter>()
         var index = 0
@@ -54,14 +54,25 @@ internal abstract class KCallableImpl<out R> : KCallable<R>, KAnnotatedElementIm
         }
 
         result.trimToSize()
-            return result
+        result
+    }
+
+    override val parameters: List<KParameter>
+        get() = parameters_()
+
+    private val returnType_ = ReflectProperties.lazySoft {
+        KTypeImpl(descriptor.returnType!!) { caller.returnType }
     }
 
     override val returnType: KType
-        get() = KTypeImpl(descriptor.returnType!!) { caller.returnType }
+        get() = returnType_()
+
+    private val typeParameters_ = ReflectProperties.lazySoft {
+        descriptor.typeParameters.map(::KTypeParameterImpl)
+    }
 
     override val typeParameters: List<KTypeParameter>
-        get() = descriptor.typeParameters.map(::KTypeParameterImpl)
+        get() = typeParameters_()
 
     override val visibility: KVisibility?
         get() = descriptor.visibility.toKVisibility()
@@ -134,15 +145,15 @@ internal abstract class KCallableImpl<out R> : KCallable<R>, KAnnotatedElementIm
     private fun defaultPrimitiveValue(type: Type): Any? =
             if (type is Class<*> && type.isPrimitive) {
                 when (type) {
-                    java.lang.Boolean.TYPE -> false
+                    Boolean::class.java -> false
-                    java.lang.Character.TYPE -> 0.toChar()
+                    Char::class.java -> 0.toChar()
-                    java.lang.Byte.TYPE -> 0.toByte()
+                    Byte::class.java -> 0.toByte()
-                    java.lang.Short.TYPE -> 0.toShort()
+                    Short::class.java -> 0.toShort()
-                    java.lang.Integer.TYPE -> 0
+                    Int::class.java -> 0
-                    java.lang.Float.TYPE -> 0f
+                    Float::class.java -> 0f
-                    java.lang.Long.TYPE -> 0L
+                    Long::class.java -> 0L
-                    java.lang.Double.TYPE -> 0.0
+                    Double::class.java -> 0.0
-                    java.lang.Void.TYPE -> throw IllegalStateException("Parameter with void type is illegal")
+                    Void.TYPE -> throw IllegalStateException("Parameter with void type is illegal")
                     else -> throw UnsupportedOperationException("Unknown primitive: $type")
                 }
             }

core/reflection.jvm/src/kotlin/reflect/jvm/internal/KClassImpl.kt

@@ -18,7 +18,6 @@ package kotlin.reflect.jvm.internal
 
 import org.jetbrains.kotlin.builtins.CompanionObjectMapping
 import org.jetbrains.kotlin.descriptors.*
-import org.jetbrains.kotlin.descriptors.annotations.Annotated
 import org.jetbrains.kotlin.incremental.components.NoLookupLocation
 import org.jetbrains.kotlin.load.java.JvmAbi
 import org.jetbrains.kotlin.load.java.structure.reflect.functionClassArity
@@ -35,8 +34,7 @@ import kotlin.reflect.*
 import kotlin.reflect.jvm.internal.KDeclarationContainerImpl.MemberBelonginess.DECLARED
 import kotlin.reflect.jvm.internal.KDeclarationContainerImpl.MemberBelonginess.INHERITED
 
-internal class KClassImpl<T : Any>(override val jClass: Class<T>) :
+internal class KClassImpl<T : Any>(override val jClass: Class<T>) : KDeclarationContainerImpl(), KClass<T>, KClassifierImpl {
-        KDeclarationContainerImpl(), KClass<T>, KClassifierImpl, KAnnotatedElementImpl {
     inner class Data : KDeclarationContainerImpl.Data() {
         val descriptor: ClassDescriptor by ReflectProperties.lazySoft {
             val classId = classId
@@ -49,6 +47,8 @@ internal class KClassImpl<T : Any>(override val jClass: Class<T>) :
             descriptor ?: reportUnresolvedClass()
         }
 
+        val annotations: List<Annotation> by ReflectProperties.lazySoft { descriptor.computeAnnotations() }
+
         val simpleName: String? by ReflectProperties.lazySoft {
             if (jClass.isAnonymousClass) return@lazySoft null
 
@@ -156,7 +156,7 @@ internal class KClassImpl<T : Any>(override val jClass: Class<T>) :
 
     override val descriptor: ClassDescriptor get() = data().descriptor
 
-    override val annotated: Annotated get() = descriptor
+    override val annotations: List<Annotation> get() = data().annotations
 
     private val classId: ClassId get() = RuntimeTypeMapper.mapJvmClassToKotlinClassId(jClass)
 

core/reflection.jvm/src/kotlin/reflect/jvm/internal/KFunctionImpl.kt

@@ -40,7 +40,7 @@ internal class KFunctionImpl private constructor(
             container, descriptor.name.asString(), RuntimeTypeMapper.mapSignature(descriptor).asString(), descriptor
     )
 
-    override val descriptor: FunctionDescriptor by ReflectProperties.lazySoft<FunctionDescriptor>(descriptorInitialValue) {
+    override val descriptor: FunctionDescriptor by ReflectProperties.lazySoft(descriptorInitialValue) {
         container.findFunctionDescriptor(name, signature)
     }
 

core/reflection.jvm/src/kotlin/reflect/jvm/internal/KParameterImpl.kt

@@ -18,7 +18,6 @@ package kotlin.reflect.jvm.internal
 
 import org.jetbrains.kotlin.descriptors.ParameterDescriptor
 import org.jetbrains.kotlin.descriptors.ValueParameterDescriptor
-import org.jetbrains.kotlin.descriptors.annotations.Annotated
 import org.jetbrains.kotlin.resolve.descriptorUtil.hasDefaultValue
 import kotlin.reflect.KParameter
 import kotlin.reflect.KType
@@ -28,10 +27,10 @@ internal class KParameterImpl(
         override val index: Int,
         override val kind: KParameter.Kind,
         computeDescriptor: () -> ParameterDescriptor
-) : KParameter, KAnnotatedElementImpl {
+) : KParameter {
     private val descriptor: ParameterDescriptor by ReflectProperties.lazySoft(computeDescriptor)
 
-    override val annotated: Annotated get() = descriptor
+    override val annotations: List<Annotation> by ReflectProperties.lazySoft { descriptor.computeAnnotations() }
 
     override val name: String? get() {
         val valueParameter = descriptor as? ValueParameterDescriptor ?: return null

core/reflection.jvm/src/kotlin/reflect/jvm/internal/KPropertyImpl.kt

@@ -79,7 +79,7 @@ internal abstract class KPropertyImpl<out R> private constructor(
 
     override abstract val getter: Getter<R>
 
-    private val descriptor_ = ReflectProperties.lazySoft<PropertyDescriptor>(descriptorInitialValue) {
+    private val descriptor_ = ReflectProperties.lazySoft(descriptorInitialValue) {
         container.findPropertyDescriptor(name, signature)
     }
 

core/reflection.jvm/src/kotlin/reflect/jvm/internal/KTypeImpl.kt

@@ -42,8 +42,7 @@ internal class KTypeImpl(
 ) : KType {
     internal val javaType: Type by ReflectProperties.lazySoft(computeJavaType)
 
-    override val classifier: KClassifier?
+    override val classifier: KClassifier? by ReflectProperties.lazySoft { convert(type) }
-        get() = convert(type)
 
     private fun convert(type: KotlinType): KClassifier? {
         val descriptor = type.constructor.declarationDescriptor
@@ -71,14 +70,13 @@ internal class KTypeImpl(
         }
     }
 
-    override val arguments: List<KTypeProjection>
+    override val arguments: List<KTypeProjection> by ReflectProperties.lazySoft arguments@ {
-        get() {
         val typeArguments = type.arguments
-            if (typeArguments.isEmpty()) return emptyList()
+        if (typeArguments.isEmpty()) return@arguments emptyList<KTypeProjection>()
 
         val parameterizedTypeArguments by lazy(PUBLICATION) { javaType.parameterizedTypeArguments }
 
-            return typeArguments.mapIndexed { i, typeProjection ->
+        typeArguments.mapIndexed { i, typeProjection ->
             if (typeProjection.isStarProjection) {
                 KTypeProjection.STAR
             }

core/reflection.jvm/src/kotlin/reflect/jvm/internal/KTypeParameterImpl.kt

@@ -26,12 +26,13 @@ internal class KTypeParameterImpl(override val descriptor: TypeParameterDescript
     override val name: String
         get() = descriptor.name.asString()
 
-    override val upperBounds: List<KType>
+    override val upperBounds: List<KType> by ReflectProperties.lazySoft {
-        get() = descriptor.upperBounds.map { kotlinType ->
+        descriptor.upperBounds.map { kotlinType ->
             KTypeImpl(kotlinType) {
                 TODO("Java type is not yet supported for type parameters: $descriptor")
             }
         }
+    }
 
     override val variance: KVariance
         get() = when (descriptor.variance) {

core/reflection.jvm/src/kotlin/reflect/jvm/internal/util.kt

@@ -19,11 +19,14 @@ package kotlin.reflect.jvm.internal
 import org.jetbrains.kotlin.descriptors.ClassDescriptor
 import org.jetbrains.kotlin.descriptors.Visibilities
 import org.jetbrains.kotlin.descriptors.Visibility
+import org.jetbrains.kotlin.descriptors.annotations.Annotated
 import org.jetbrains.kotlin.load.java.components.RuntimeSourceElementFactory
 import org.jetbrains.kotlin.load.java.reflect.tryLoadClass
+import org.jetbrains.kotlin.load.java.structure.reflect.ReflectJavaAnnotation
 import org.jetbrains.kotlin.load.java.structure.reflect.ReflectJavaClass
 import org.jetbrains.kotlin.load.java.structure.reflect.safeClassLoader
 import org.jetbrains.kotlin.load.kotlin.KotlinJvmBinarySourceElement
+import org.jetbrains.kotlin.load.kotlin.reflect.ReflectAnnotationSource
 import org.jetbrains.kotlin.load.kotlin.reflect.ReflectKotlinClass
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.platform.JavaToKotlinClassMap
@@ -85,6 +88,16 @@ internal fun Visibility.toKVisibility(): KVisibility? =
             else -> null
         }
 
+internal fun Annotated.computeAnnotations(): List<Annotation> =
+        annotations.mapNotNull {
+            val source = it.source
+            when (source) {
+                is ReflectAnnotationSource -> source.annotation
+                is RuntimeSourceElementFactory.RuntimeSourceElement -> (source.javaElement as? ReflectJavaAnnotation)?.annotation
+                else -> null
+            }
+        }
+
 // TODO: wrap other exceptions
 internal inline fun <R> reflectionCall(block: () -> R): R =
         try {