[FIR2IR] Introduce abstract bindable symbol

compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/symbols/Fir2IrBindableSymbol.kt

@@ -0,0 +1,69 @@
+/*
+ * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.fir.symbols
+
+import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
+import org.jetbrains.kotlin.descriptors.SourceElement
+import org.jetbrains.kotlin.descriptors.annotations.Annotations
+import org.jetbrains.kotlin.ir.declarations.*
+import org.jetbrains.kotlin.ir.descriptors.*
+import org.jetbrains.kotlin.ir.symbols.IrBindableSymbol
+import org.jetbrains.kotlin.ir.util.IdSignature
+import org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedContainerSource
+
+abstract class Fir2IrBindableSymbol<out D : DeclarationDescriptor, B : IrSymbolOwner>(
+    private val containerSource: DeserializedContainerSource? = null
+) : IrBindableSymbol<D, B> {
+
+    private var _owner: B? = null
+    override val owner: B
+        get() = _owner ?: throw IllegalStateException("Symbol is unbound")
+
+    override fun bind(owner: B) {
+        if (_owner == null) {
+            _owner = owner
+        } else {
+            throw IllegalStateException("${javaClass.simpleName} is already bound")
+        }
+    }
+
+    override val isPublicApi: Boolean = false
+
+    override val signature: IdSignature
+        get() = error("IdSignature is allowed only for PublicApi symbols")
+
+    override val isBound: Boolean
+        get() = _owner != null
+
+    override val descriptor: D by lazy {
+        when (val owner = owner) {
+            is IrEnumEntry -> WrappedEnumEntryDescriptor().apply { bind(owner) }
+            is IrClass -> WrappedClassDescriptor().apply { bind(owner) }
+            is IrConstructor -> WrappedClassConstructorDescriptor().apply { bind(owner) }
+            is IrSimpleFunction -> when {
+                owner.name.isSpecial && owner.name.asString().startsWith("get") ->
+                    WrappedPropertyGetterDescriptor(Annotations.EMPTY, SourceElement.NO_SOURCE)
+                owner.name.isSpecial && owner.name.asString().startsWith("set") ->
+                    WrappedPropertySetterDescriptor(Annotations.EMPTY, SourceElement.NO_SOURCE)
+                else -> if (containerSource != null) {
+                    WrappedFunctionDescriptorWithContainerSource(containerSource)
+                } else {
+                    WrappedSimpleFunctionDescriptor()
+                }
+            }.apply { bind(owner) }
+            is IrVariable -> WrappedVariableDescriptor().apply { bind(owner) }
+            is IrValueParameter -> WrappedValueParameterDescriptor().apply { bind(owner) }
+            is IrTypeParameter -> WrappedTypeParameterDescriptor().apply { bind(owner) }
+            is IrProperty -> if (containerSource != null) {
+                WrappedPropertyDescriptorWithContainerSource(containerSource)
+            } else {
+                WrappedPropertyDescriptor()
+            }.apply { bind(owner) }
+            is IrField -> WrappedFieldDescriptor().apply { bind(owner) }
+            else -> throw IllegalStateException("Unsupported owner in Fir2IrBindableSymbol: $owner")
+        } as D
+    }
+}