Code clarification

j2k/src/org/jetbrains/kotlin/j2k/CodeBuilder.kt

@@ -30,7 +30,7 @@ import java.util.HashSet
 import java.util.LinkedHashSet
 import kotlin.platform.platformName
 
-fun<T> CodeBuilder.append(generators: Collection<() -> T>, separator: String, prefix: String = "", suffix: String = ""): CodeBuilder {
+fun<T> CodeBuilder.buildList(generators: Collection<() -> T>, separator: String, prefix: String = "", suffix: String = ""): CodeBuilder {
     if (generators.isNotEmpty()) {
         append(prefix)
         var first = true
@@ -48,7 +48,7 @@ fun<T> CodeBuilder.append(generators: Collection<() -> T>, separator: String, pr
 
 platformName("appendElements")
 fun CodeBuilder.append(elements: Collection<Element>, separator: String, prefix: String = "", suffix: String = ""): CodeBuilder {
-    return append(elements.filter { !it.isEmpty }.map { { append(it) } }, separator, prefix, suffix)
+    return buildList(elements.filter { !it.isEmpty }.map { { append(it) } }, separator, prefix, suffix)
 }
 
 class ElementCreationStackTraceRequiredException : RuntimeException()

j2k/src/org/jetbrains/kotlin/j2k/ast/Annotation.kt

@@ -27,16 +27,18 @@ class Annotation(val name: Identifier, val arguments: List<Pair<Identifier?, Def
         else {
             builder.append(name)
                     .append("(")
-                    .append(arguments.map {
-                        {
-                            if (it.first != null) {
-                                builder append it.first!! append " = " append it.second
-                            }
-                            else {
-                                builder append it.second
-                            }
-                        }
-                    }, ", ")
+                    .buildList(
+                            generators = arguments.map {
+                                {
+                                    if (it.first != null) {
+                                        builder append it.first!! append " = " append it.second
+                                    }
+                                    else {
+                                        builder append it.second
+                                    }
+                                }
+                            },
+                            separator = ", ")
                     .append(")")
         }
     }

j2k/src/org/jetbrains/kotlin/j2k/ast/ArrayWithoutInitializationExpression.kt

@@ -17,7 +17,6 @@
 package org.jetbrains.kotlin.j2k.ast
 
 import org.jetbrains.kotlin.j2k.CodeBuilder
-import org.jetbrains.kotlin.j2k.append
 
 class ArrayWithoutInitializationExpression(val type: ArrayType, val expressions: List<Expression>) : Expression() {
     override fun generateCode(builder: CodeBuilder) {

j2k/src/org/jetbrains/kotlin/j2k/ast/Class.kt

@@ -18,6 +18,7 @@ package org.jetbrains.kotlin.j2k.ast
 
 import org.jetbrains.kotlin.j2k.CodeBuilder
 import org.jetbrains.kotlin.j2k.append
+import org.jetbrains.kotlin.j2k.buildList
 
 open class Class(
         val name: Identifier,
@@ -52,7 +53,9 @@ open class Class(
         get() = "class"
 
     protected fun appendBaseTypes(builder: CodeBuilder) {
-        builder.append(baseClassSignatureWithParams(builder) + implementsTypes.map { { builder.append(it) } }, ", ", ":")
+        builder.buildList(generators = baseClassSignatureWithParams(builder) + implementsTypes.map { { builder.append(it) } },
+                          separator = ", ",
+                          prefix = ":")
     }
 
     private fun baseClassSignatureWithParams(builder: CodeBuilder): List<() -> CodeBuilder> {

j2k/src/org/jetbrains/kotlin/j2k/ast/LocalVariable.kt

@@ -18,7 +18,6 @@ package org.jetbrains.kotlin.j2k.ast
 
 import org.jetbrains.kotlin.j2k.ConverterSettings
 import org.jetbrains.kotlin.j2k.CodeBuilder
-import org.jetbrains.kotlin.j2k.append
 
 class LocalVariable(
         private val identifier: Identifier,

j2k/src/org/jetbrains/kotlin/j2k/ast/TypeParameters.kt

@@ -44,7 +44,10 @@ class TypeParameterList(val parameters: List<TypeParameter>) : Element() {
 
     fun appendWhere(builder: CodeBuilder): CodeBuilder {
         if (hasWhere()) {
-            builder.append( parameters.map { { it.whereToKotlin(builder) } }, ", ", " where ", "")
+            builder.buildList(generators = parameters.map { { it.whereToKotlin(builder) } },
+                              separator = ", ",
+                              prefix = " where ",
+                              suffix = "")
         }
         return builder
     }