IrDeclarationContainer as a super-interface for IrFile and IrClass.

Builder for IrDeclarationContainer (initial implementation; TODO more flexible builders).

compiler/ir/ir.psi2ir/src/org/jetbrains/kotlin/psi2ir/PsiSourceManager.kt

@@ -62,6 +62,8 @@ class PsiSourceManager : SourceManager {
 
         fun getRecognizableName(): String = psiFileName
 
+        override val name: String get() = getRecognizableName()
+
         override fun toString(): String = getRecognizableName()
     }
 

compiler/ir/ir.psi2ir/src/org/jetbrains/kotlin/psi2ir/generators/ModuleGenerator.kt

@@ -47,8 +47,7 @@ class ModuleGenerator(override val context: GeneratorContext) : Generator {
     fun createEmptyIrFile(ktFile: KtFile): IrFileImpl {
         val fileEntry = context.sourceManager.getOrCreateFileEntry(ktFile)
         val packageFragmentDescriptor = getOrFail(BindingContext.FILE_TO_PACKAGE_FRAGMENT, ktFile)
-        val fileName = fileEntry.getRecognizableName()
-        val irFile = IrFileImpl(fileEntry, fileName, packageFragmentDescriptor)
+        val irFile = IrFileImpl(fileEntry, packageFragmentDescriptor)
         context.sourceManager.putFileEntry(irFile, fileEntry)
         return irFile
     }

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/SourceManager.kt

@@ -32,6 +32,7 @@ data class SourceRangeInfo(
 
 interface SourceManager {
     interface FileEntry {
+        val name: String
         val maxOffset: Int
         fun getSourceRangeInfo(beginOffset: Int, endOffset: Int): SourceRangeInfo
         fun getLineNumber(offset: Int): Int

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrClass.kt

@@ -18,17 +18,24 @@ package org.jetbrains.kotlin.ir.declarations
 
 import org.jetbrains.kotlin.descriptors.ClassDescriptor
 
-interface IrClass : IrDeclaration {
+interface IrClass : IrDeclaration, IrDeclarationContainer {
     override val declarationKind: IrDeclarationKind
         get() = IrDeclarationKind.CLASS
 
     override val descriptor: ClassDescriptor
 
-    val members: List<IrDeclaration>
+    interface Builder : IrDeclarationContainer.Builder {
+        val startOffset: Int
+        val endOffset: Int
+        var origin: IrDeclarationOrigin
+        val descriptor: ClassDescriptor
+
+        override fun build(): IrClass
+    }
 }
 
 fun IrClass.getInstanceInitializerMembers() =
-        members.filter {
+        declarations.filter {
             when (it) {
                 is IrAnonymousInitializer ->
                     true

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrDeclarationContainer.kt

@@ -0,0 +1,29 @@
+/*
+ * Copyright 2010-2016 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 org.jetbrains.kotlin.ir.declarations
+
+interface IrDeclarationContainer {
+    val declarations: List<IrDeclaration>
+
+    fun toBuilder(): Builder
+
+    interface Builder {
+        val declarations: MutableList<IrDeclaration>
+
+        fun build(): IrDeclarationContainer
+    }
+}

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrFile.kt

@@ -21,11 +21,20 @@ import org.jetbrains.kotlin.descriptors.annotations.AnnotationDescriptor
 import org.jetbrains.kotlin.ir.IrElement
 import org.jetbrains.kotlin.ir.SourceManager
 
-interface IrFile : IrElement {
-    val name: String
+interface IrFile : IrElement, IrDeclarationContainer {
     val fileEntry: SourceManager.FileEntry
     val fileAnnotations: List<AnnotationDescriptor>
     val packageFragmentDescriptor: PackageFragmentDescriptor
-    val declarations: List<IrDeclaration>
+
+    override fun toBuilder(): Builder
+
+    interface Builder : IrDeclarationContainer.Builder {
+        val fileEntry: SourceManager.FileEntry
+        val fileAnnotations: MutableList<AnnotationDescriptor>
+        val packageFragmentDescriptor: PackageFragmentDescriptor
+
+        override fun build(): IrFile
+    }
 }
 
+val IrFile.name: String get() = fileEntry.name

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/impl/IrClassImpl.kt

@@ -20,6 +20,7 @@ import org.jetbrains.kotlin.descriptors.ClassDescriptor
 import org.jetbrains.kotlin.ir.*
 import org.jetbrains.kotlin.ir.declarations.IrClass
 import org.jetbrains.kotlin.ir.declarations.IrDeclaration
+import org.jetbrains.kotlin.ir.declarations.IrDeclarationContainer
 import org.jetbrains.kotlin.ir.declarations.IrDeclarationOrigin
 import org.jetbrains.kotlin.ir.visitors.IrElementVisitor
 import java.util.*
@@ -30,20 +31,36 @@ class IrClassImpl(
         origin: IrDeclarationOrigin,
         override val descriptor: ClassDescriptor
 ) : IrDeclarationBase(startOffset, endOffset, origin), IrClass {
-    override val members: MutableList<IrDeclaration> = ArrayList()
-
-    fun addMember(member: IrDeclaration) {
-        member.setTreeLocation(this, members.size)
-        members.add(member)
+    constructor(
+            startOffset: Int, endOffset: Int, origin: IrDeclarationOrigin, descriptor: ClassDescriptor,
+            members: List<IrDeclaration>
+    ) : this(startOffset, endOffset, origin, descriptor) {
+        addAll(members)
     }
 
+    override val declarations: MutableList<IrDeclaration> = ArrayList()
+
+    fun addMember(member: IrDeclaration) {
+        member.setTreeLocation(this, declarations.size)
+        declarations.add(member)
+    }
+
+    fun addAll(members: List<IrDeclaration>) {
+        val originalSize = declarations.size
+        declarations.addAll(members)
+        members.forEachIndexed { i, irDeclaration -> irDeclaration.setTreeLocation(this, originalSize + i) }
+    }
+
+    override fun toBuilder(): IrDeclarationContainer.Builder =
+            IrClassBuilderImpl(this)
+
     override fun getChild(slot: Int): IrElement? =
-            members.getOrNull(slot)
+            declarations.getOrNull(slot)
 
 
     override fun replaceChild(slot: Int, newChild: IrElement) {
-        members.getOrNull(slot)?.detach() ?: throwNoSuchSlot(slot)
-        members[slot] = newChild.assertCast()
+        declarations.getOrNull(slot)?.detach() ?: throwNoSuchSlot(slot)
+        declarations[slot] = newChild.assertCast()
         newChild.setTreeLocation(this, slot)
     }
 
@@ -51,6 +68,20 @@ class IrClassImpl(
             visitor.visitClass(this, data)
 
     override fun <D> acceptChildren(visitor: IrElementVisitor<Unit, D>, data: D) {
-        members.forEach { it.accept(visitor, data) }
+        declarations.forEach { it.accept(visitor, data) }
     }
+}
+
+class IrClassBuilderImpl(
+        override val startOffset: Int,
+        override val endOffset: Int,
+        override var origin: IrDeclarationOrigin,
+        override val descriptor: ClassDescriptor,
+        override val declarations: MutableList<IrDeclaration>
+) : IrClass.Builder {
+    constructor(irClass: IrClass) : this(irClass.startOffset, irClass.endOffset, irClass.origin, irClass.descriptor,
+                                         irClass.declarations.toMutableList())
+
+    override fun build(): IrClass =
+            IrClassImpl(startOffset, endOffset, origin, descriptor, declarations)
 }

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/impl/IrFileImpl.kt

@@ -27,15 +27,26 @@ import java.util.*
 
 class IrFileImpl(
         override val fileEntry: SourceManager.FileEntry,
-        override val name: String,
         override val packageFragmentDescriptor: PackageFragmentDescriptor
 ) : IrElementBase(0, fileEntry.maxOffset), IrFile {
+    constructor(
+            fileEntry: SourceManager.FileEntry, packageFragmentDescriptor: PackageFragmentDescriptor,
+            fileAnnotations: List<AnnotationDescriptor>, declarations: List<IrDeclaration>
+    ) : this(fileEntry, packageFragmentDescriptor) {
+        addAllAnnotations(fileAnnotations)
+        addAll(declarations)
+    }
+
     override val fileAnnotations: MutableList<AnnotationDescriptor> = SmartList()
 
     fun addAnnotation(annotation: AnnotationDescriptor) {
         fileAnnotations.add(annotation)
     }
 
+    fun addAllAnnotations(annotations: List<AnnotationDescriptor>) {
+        fileAnnotations.addAll(annotations)
+    }
+
     override val declarations: MutableList<IrDeclaration> = ArrayList()
 
     fun addDeclaration(declaration: IrDeclaration) {
@@ -43,6 +54,14 @@ class IrFileImpl(
         declarations.add(declaration)
     }
 
+    fun addAll(newDeclarations: List<IrDeclaration>) {
+        val originalSize = declarations.size
+        declarations.addAll(newDeclarations)
+        newDeclarations.forEachIndexed { i, irDeclaration ->
+            irDeclaration.setTreeLocation(this, originalSize + i)
+        }
+    }
+
     override fun getChild(slot: Int): IrElement? =
             declarations.getOrNull(slot)
 
@@ -52,6 +71,9 @@ class IrFileImpl(
         newChild.setTreeLocation(this, slot)
     }
 
+    override fun toBuilder(): IrFile.Builder =
+            IrFileBuilderImpl(this)
+
     override fun <R, D> accept(visitor: IrElementVisitor<R, D>, data: D): R =
             visitor.visitFile(this, data)
 
@@ -60,4 +82,19 @@ class IrFileImpl(
     }
 
 
+}
+
+class IrFileBuilderImpl(
+        override val fileEntry: SourceManager.FileEntry,
+        override val packageFragmentDescriptor: PackageFragmentDescriptor,
+        override val fileAnnotations: MutableList<AnnotationDescriptor>,
+        override val declarations: MutableList<IrDeclaration>
+) : IrFile.Builder {
+    constructor(irFile: IrFile) : this(irFile.fileEntry,
+                                       irFile.packageFragmentDescriptor,
+                                       irFile.fileAnnotations.toMutableList(),
+                                       irFile.declarations.toMutableList())
+
+    override fun build(): IrFile =
+            IrFileImpl(fileEntry, packageFragmentDescriptor, fileAnnotations, declarations)
 }