New J2K: Add support of vararg parameters in method declaration

j2k/newSrc/org/jetbrains/kotlin/j2k/JavaToJKTreeBuilder.kt

@@ -506,9 +506,14 @@ class JavaToJKTreeBuilder(var symbolProvider: JKSymbolProvider) {
         }
 
         fun PsiParameter.toJK(): JKParameter {
+            val rawType = with(expressionTreeMapper) { typeElement?.toJK() } ?: JKTypeElementImpl(JKNoTypeImpl)
+            val type =
+                if (isVarArgs && rawType.type is JKJavaArrayType) JKTypeElementImpl((rawType.type as JKJavaArrayType).type)
+                else rawType
             return JKParameterImpl(
-                with(expressionTreeMapper) { typeElement?.toJK() } ?: JKTypeElementImpl(JKNoTypeImpl),
+                type,
-                JKNameIdentifierImpl(name!!)
+                JKNameIdentifierImpl(name!!),
+                isVarArgs
             ).also {
                 symbolProvider.provideUniverseSymbol(this, it)
                 it.psi = this

j2k/newSrc/org/jetbrains/kotlin/j2k/NewCodeBuilder.kt

@@ -299,6 +299,9 @@ class NewCodeBuilder {
         override fun visitParameter(parameter: JKParameter) {
             renderModifiersList(parameter)
             printer.printWithNoIndent(" ")
+            if (parameter.isVarArgs) {
+                printer.printWithNoIndent("vararg ")
+            }
             parameter.name.accept(this)
             if (parameter.type.present() && parameter.type.type !is JKContextType) {
                 printer.printWithNoIndent(":")

j2k/newSrc/org/jetbrains/kotlin/j2k/tree/impl/jk.kt

@@ -83,6 +83,7 @@ class JKForLoopVariableImpl(
 class JKParameterImpl(
     type: JKTypeElement,
     name: JKNameIdentifier,
+    override var isVarArgs: Boolean = false,
     initializer: JKExpression = JKStubExpressionImpl()
 ) : JKParameter, JKBranchElementBase(), PsiOwner by PsiOwnerImpl() {
     override fun <R, D> accept(visitor: JKVisitor<R, D>, data: D): R = visitor.visitParameter(this, data)

j2k/newSrc/org/jetbrains/kotlin/j2k/tree/jk.kt

@@ -287,7 +287,9 @@ interface JKLiteralExpression : JKExpression {
     }
 }
 
-interface JKParameter : JKVariable, JKModifiersListOwner
+interface JKParameter : JKVariable, JKModifiersListOwner {
+    var isVarArgs: Boolean
+}
 
 interface JKStringLiteralExpression : JKLiteralExpression {
     val text: String