KT-18786: J2K should move all properties to top of class

#KT-18786 fixed

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

@@ -22,7 +22,7 @@ import org.jetbrains.kotlin.j2k.append
 
 abstract class Member(var annotations: Annotations, val modifiers: Modifiers) : Element()
 
-class ClassBody (
+class ClassBody(
         val primaryConstructor: PrimaryConstructor?,
         val primaryConstructorSignature: PrimaryConstructorSignature?,
         val baseClassParams: List<DeferredElement<Expression>>?,
@@ -39,7 +39,7 @@ class ClassBody (
         builder append " " append lBrace append "\n"
 
         if (!classKind.isEnum()) {
-            builder.append(membersFiltered, "\n")
+            builder.append(membersFiltered.sortedWith(PropertyComparator), "\n")
         }
         else {
             val (constants, otherMembers) = membersFiltered.partition { it is EnumConstant }
@@ -50,7 +50,7 @@ class ClassBody (
                 builder.append(";\n")
             }
 
-            builder.append(otherMembers, "\n")
+            builder.append(otherMembers.sortedWith(PropertyComparator), "\n")
         }
 
         appendCompanionObject(builder, membersFiltered.isNotEmpty())
@@ -64,3 +64,12 @@ class ClassBody (
         builder.append(companionObjectMembers, "\n", "companion object {\n", "\n}")
     }
 }
+
+private object PropertyComparator : Comparator<Member> {
+    override fun compare(o1: Member?, o2: Member?): Int = when {
+        o1 is Property && o2 is Property -> 0
+        o1 is Property -> -1
+        o2 is Property -> 1
+        else -> 0
+    }
+}

j2k/testData/fileOrElement/annotations/modifiersToAnnotationsFromPropertyAccessors.kt

@@ -1,8 +1,8 @@
 class WithModifiersOnAccessors {
-    @Synchronized private fun methSync() {}
-    @Strictfp protected fun methStrict() {}
 
     @get:Synchronized @set:Synchronized var sync = 0
 
     @get:Strictfp var strict = 0.0
+    @Synchronized private fun methSync() {}
+    @Strictfp protected fun methStrict() {}
 }

j2k/testData/fileOrElement/callChainExpression/libraryMethodCall.kt

@@ -1,8 +1,9 @@
 internal object Library {
-    fun call() {}
 
     val string: String
         get() = ""
+
+    fun call() {}
 }
 
 internal class User {

j2k/testData/fileOrElement/callChainExpression/libraryMethodCallFromInstance-settings.kt

@@ -1,10 +1,11 @@
 // !forceNotNullTypes: false
 // !specifyLocalVariableTypeByDefault: true
 internal class Library {
-    fun call() {}
 
     val string: String
         get() = ""
+
+    fun call() {}
 }
 
 internal class User {

j2k/testData/fileOrElement/callChainExpression/libraryMethodCallFromInstance.kt

@@ -1,8 +1,9 @@
 internal class Library {
-    fun call() {}
 
     val string: String
         get() = ""
+
+    fun call() {}
 }
 
 internal class User {

j2k/testData/fileOrElement/class/utilityClass1.kt

@@ -1,6 +1,6 @@
 internal object Util {
-    fun util1() {}
-    fun util2() {}
 
     val CONSTANT = 10
+    fun util1() {}
+    fun util2() {}
 }

j2k/testData/fileOrElement/class/utilityClass2.kt

@@ -1,7 +1,7 @@
 internal object Util {
 
+    val CONSTANT = 10
+
     fun util1() {}
     fun util2() {}
-
+}
-    val CONSTANT = 10
-}

j2k/testData/fileOrElement/class/utilityClass3.kt

@@ -1,6 +1,6 @@
 internal object Util {
-    fun util1() {}
-    fun util2() {}
 
     val CONSTANT = 10
-}
+    fun util1() {}
+    fun util2() {}
+}

j2k/testData/fileOrElement/comments/comments2.kt

@@ -3,6 +3,8 @@
 package foo
 
 internal class A {
+
+    private /*it's private*/ val field = 0
     fun /* nothing to return */ foo(/* no parameters at all */) {
         // let declare a variable
         // with 2 comments before
@@ -12,8 +14,6 @@ internal class A {
     fun /* we return int*/ foo(/*int*/ p: Int/* parameter p */): Int { /* body is empty */
     }
 
-    private/*it's private*/ val field = 0
-
     /*it's public*/ fun foo(s: String): Char {}
 
     protected/*it's protected*/ fun foo(c: Char) {}

j2k/testData/fileOrElement/detectProperties/InInterface.kt

@@ -3,11 +3,11 @@ internal interface I {
 
     var something2: Int
 
-    fun setSomething3(value: Int)
-
     val something4: Int
-    fun setSomething4(value: String)
 
     val something5: Int
+
+    fun setSomething3(value: Int)
+    fun setSomething4(value: String)
     fun setSomething5(value: Int): Int
-}
+}

j2k/testData/fileOrElement/detectProperties/Overrides.kt

@@ -15,9 +15,9 @@ internal interface I {
 }
 
 internal interface I1 : I {
-    fun setSomething1(value: Int)
 
     val something6: Int
+    fun setSomething1(value: Int)
 }
 
 internal open class B {
@@ -59,14 +59,6 @@ internal abstract class C(override val something1: Int) : B(), I {
 
         }
 
-    fun getSomething6(): Int {
-        return mySomething6
-    }
-
-    override fun setSomething6(value: Int) {
-        mySomething6 = value
-    }
-
     override val fromB1: String
         get() = super.fromB1
 
@@ -91,6 +83,14 @@ internal abstract class C(override val something1: Int) : B(), I {
     val fromB5: String
         get() = ""
 
+    fun getSomething6(): Int {
+        return mySomething6
+    }
+
+    override fun setSomething6(value: Int) {
+        mySomething6 = value
+    }
+
     override fun setFromB5(value: String) {
         super.setFromB5(value)
     }

j2k/testData/fileOrElement/detectProperties/PropertyType.kt

@@ -4,6 +4,8 @@ internal class A {
     private val list1 = ArrayList<String>()
     private val list2 = ArrayList<String>()
     private val myList3 = ArrayList<String>()
+    val list3: List<String>
+        get() = myList3
 
     fun getList1(): List<String> {
         return list1
@@ -13,9 +15,6 @@ internal class A {
         return list2
     }
 
-    val list3: List<String>
-        get() = myList3
-
     fun foo() {
         list1.add("a")
         list2.add("a")

j2k/testData/fileOrElement/field/specifyType.kt

@@ -15,20 +15,6 @@ internal class A {
     private var field9: String? = "a"
     private var field10: String? = foo()
 
-    fun foo(): String {
-        return "x"
-    }
-
-    fun bar() {
-        field5 = ArrayList()
-        field7++
-        field8++
-        field9 = null
-        field10 = null
-    }
-
-    internal interface I
-
     private val anonymous: I = object : I {
 
     }
@@ -43,6 +29,20 @@ internal class A {
 
     private var iimpl = anonymous
 
+    fun foo(): String {
+        return "x"
+    }
+
+    fun bar() {
+        field5 = ArrayList()
+        field7++
+        field8++
+        field9 = null
+        field10 = null
+    }
+
+    internal interface I
+
     fun testAnonymousObject(i: Any) {
         if (true) {
             iimpl = i as I

j2k/testData/fileOrElement/formatting/nonStaticMembers.kt

@@ -1,10 +1,10 @@
 internal class F {
+    var i: Int? = 0
 
     fun f1() {}
 
 
     fun f2() {}
-    var i: Int? = 0
 
     fun f3() {}
 }

j2k/testData/fileOrElement/formatting/nonStaticMembersWithComments.kt

@@ -1,4 +1,5 @@
 internal class F {
+    var i: Int? = 0
 
     //c1
 
@@ -13,7 +14,6 @@ internal class F {
     //c4
 
     fun f2() {}
-    var i: Int? = 0
 
     fun f3() {}
 

j2k/testData/fileOrElement/formatting/staticMembersWithComments.kt

@@ -1,4 +1,5 @@
 internal object F {
+    var i: Int? = 0
 
     //c1
 
@@ -13,7 +14,6 @@ internal object F {
     //c4
 
     fun f2() {}
-    var i: Int? = 0
 
     fun f3() {}
 

j2k/testData/fileOrElement/function/nativeMethods.kt

@@ -1,7 +1,8 @@
 class Foo {
-    private external fun nativeMethod()
 
     var bar: Int
         external get
         external set
+
+    private external fun nativeMethod()
 }

j2k/testData/fileOrElement/issues/comments.kt

@@ -17,23 +17,9 @@ internal class C {
      */
     private val i: Int = 0
 
-    /**
-     * This is a function doc comment.
-     */
-    fun foo() {
-        /* This is a function comment */
-    }
-
-    //simple one line comment for function
-    fun f1() {}
-
     //simple one line comment for field
     var j: Int = 0
 
-    //double c style
-    //comment before function
-    fun f2() {}
-
     //double c style
     //comment before field
     var k: Int = 0
@@ -46,7 +32,24 @@ internal class C {
      * different
      */
     //comments
-    fun f3() {}
+    var l: Int = 0
+
+    /*two*/ /*comments*//*line*/
+    var z: Int = 0
+
+    /**
+     * This is a function doc comment.
+     */
+    fun foo() {
+        /* This is a function comment */
+    }
+
+    //simple one line comment for function
+    fun f1() {}
+
+    //double c style
+    //comment before function
+    fun f2() {}
 
     //combination
     /** of
@@ -56,8 +59,5 @@ internal class C {
      * different
      */
     //comments
-    var l: Int = 0
+    fun f3() {}
-
+}
-    /*two*/ /*comments*//*line*/
-    var z: Int = 0
-}

j2k/testData/fileOrElement/issues/kt-963.kt

@@ -1,10 +1,9 @@
-// ERROR: Variable cannot be initialized before declaration
 package demo
 
 internal class C(a: Int) {
+    var abc = 0
+
     init {
         abc = a * 2
     }
-
-    var abc = 0
 }

j2k/testData/fileOrElement/nullability/nullableInitializer1.kt

@@ -1,11 +1,11 @@
 class Test {
-    fun nullableString(p: Int): String? {
-        return if (p > 0) "response" else null
-    }
 
     private var nullableInitializerField = nullableString(3)
     private val nullableInitializerFieldFinal = nullableString(3)
     var nullableInitializerPublicField = nullableString(3)
+    fun nullableString(p: Int): String? {
+        return if (p > 0) "response" else null
+    }
 
     fun testProperty() {
         nullableInitializerField = "aaa"

j2k/testData/fileOrElement/nullability/nullableInitializer2.kt

@@ -1,11 +1,11 @@
 // ERROR: Type mismatch: inferred type is String? but String was expected
 class TestJava {
-    fun nullableObj(p: Int): Any? {
-        return if (p > 0) "response" else null
-    }
 
     var nullableInitializerFieldCast: String = nullableObj(3) as String?
     private val nullableInitializerPrivateFieldCast = nullableObj(3) as String?
+    fun nullableObj(p: Int): Any? {
+        return if (p > 0) "response" else null
+    }
 
     fun testProperty() {
         nullableInitializerFieldCast[0]

j2k/testData/fileOrElement/nullability/nullableInitializer3.kt

@@ -1,10 +1,10 @@
 class Test {
-    fun notNullString(p: Int): String {
-        return "response"
-    }
 
     private val notNullInitializerField = notNullString(3)
     var notNullInitializerPublicField = notNullString(3)
+    fun notNullString(p: Int): String {
+        return "response"
+    }
 
     fun testProperty() {
         notNullInitializerField[0]

j2k/testData/fileOrElement/protected/inheritorsSamePackage.kt

@@ -1,6 +1,9 @@
 package test
 
 open class BaseInheritorSamePackage {
+
+    var i = 1
+
     constructor() {
 
     }
@@ -12,8 +15,6 @@ open class BaseInheritorSamePackage {
     fun foo() {
         BaseInheritorSamePackage(1)
     }
-
-    var i = 1
 }
 
 internal class DerivedInheritorSamePackage : BaseInheritorSamePackage() {

j2k/testData/fileOrElement/protected/protectedInSamePackage.kt

@@ -2,11 +2,11 @@ package test
 
 class BaseSamePackage {
 
+    var i = 1
+
     fun foo() {
 
     }
-
-    var i = 1
 }
 
 internal class DerivedSamePackage {

j2k/testData/fileOrElement/protected/superInSamePackage.kt

@@ -10,9 +10,9 @@ internal open class BaseSuperSamePackage {
 
 internal class DerivedSuperSamePackage : BaseSuperSamePackage() {
 
+    var i = 1
+
     fun foo() {
 
     }
-
-    var i = 1
 }

j2k/testData/fileOrElement/protected/usages.kt

@@ -19,12 +19,13 @@ class BaseProtectedConstructor {
 }
 
 internal class DerivedSamePackage {
+
+    private val i = BaseProtectedConstructor().usageInPropertyInitializer()
+
     init {
         BaseProtectedConstructor().usageInConstructor()
     }
 
-    private val i = BaseProtectedConstructor().usageInPropertyInitializer()
-
     fun usage() {
         BaseProtectedConstructor().usageInMethod()
     }

j2k/testData/fileOrElement/returnStatement/currentMethodBug.kt

@@ -12,7 +12,7 @@ internal class C {
             return string
         }
 
-    fun foo(i: I) {}
-
     var string: String? = null
+
+    fun foo(i: I) {}
 }

j2k/testData/multiFile/GetterAndSetterUsages/2.kt

@@ -1,9 +1,10 @@
 class B {
+
+    var yy = ""
+        private set
+
     internal fun foo(a: AAA) {
         a.x = a.x + 1
         yy += "a"
     }
-
+}
-    var yy = ""
-        private set
-}

j2k/testData/multiFile/ProtectedVisibility/InheritorOtherPackage1.kt

@@ -2,9 +2,9 @@ package test
 
 open class BaseOtherPackage protected constructor() {
 
+    protected var i = 1
+
     protected fun foo() {
 
     }
-
-    protected var i = 1
 }

j2k/testData/multiFile/ToObject/Utils.kt

@@ -1,10 +1,10 @@
 package test
 
 internal object Utils {
+
+    val staticField = 1
     fun foo1(p: Int) {}
     fun foo2(): Int {
         return 1
     }
-
+}
-    val staticField = 1
-}