Annotate fields from traits' class object properties

compiler/backend/src/org/jetbrains/jet/codegen/ImplementationBodyCodegen.java

@@ -24,10 +24,7 @@ import com.intellij.psi.PsiElement;
 import com.intellij.util.ArrayUtil;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
-import org.jetbrains.asm4.AnnotationVisitor;
-import org.jetbrains.asm4.Label;
-import org.jetbrains.asm4.MethodVisitor;
-import org.jetbrains.asm4.Type;
+import org.jetbrains.asm4.*;
 import org.jetbrains.asm4.commons.InstructionAdapter;
 import org.jetbrains.asm4.commons.Method;
 import org.jetbrains.jet.codegen.binding.CalculatedClosure;
@@ -1072,8 +1069,10 @@ public class ImplementationBodyCodegen extends ClassBodyCodegen {
             for (PropertyAndDefaultValue propertyInfo : classObjectPropertiesToCopy) {
                 PropertyDescriptor propertyDescriptor = propertyInfo.propertyDescriptor;
 
-                v.newField(null, ACC_STATIC | ACC_FINAL | ACC_PUBLIC, context.getFieldName(propertyDescriptor),
-                           typeMapper.mapType(propertyDescriptor).getDescriptor(), null, propertyInfo.defaultValue);
+                FieldVisitor fv = v.newField(null, ACC_STATIC | ACC_FINAL | ACC_PUBLIC, context.getFieldName(propertyDescriptor),
+                                                  typeMapper.mapType(propertyDescriptor).getDescriptor(), null, propertyInfo.defaultValue);
+
+                AnnotationCodegen.forField(fv, typeMapper).genAnnotations(propertyDescriptor);
 
                 //This field are always static and final so if it has constant initializer don't do anything in clinit,
                 //field would be initialized via default value in v.newField(...) - see JVM SPEC Ch.4

compiler/testData/asJava/nullabilityAnnotations/ClassObjectField.java

@@ -0,0 +1,18 @@
+public final class ClassObjectField implements jet.JetObject {
+    @org.jetbrains.annotations.Nullable
+    public static final java.lang.String x = "";
+    private static final java.lang.String y = "";
+    public static final ClassObjectField.object object$;
+
+    @org.jetbrains.annotations.NotNull
+    public ClassObjectField() { /* compiled code */ }
+
+    public static final class object implements jet.JetObject {
+        @org.jetbrains.annotations.Nullable
+        public final java.lang.String getX() { /* compiled code */ }
+
+        private final java.lang.String getY() { /* compiled code */ }
+
+        private object() { /* compiled code */ }
+    }
+}

compiler/testData/asJava/nullabilityAnnotations/ClassObjectField.kt

@@ -0,0 +1,6 @@
+class ClassObjectField {
+    class object {
+        val x: String? = ""
+        private val y: String? = ""
+    }
+}

compiler/testData/asJava/nullabilityAnnotations/TraitClassObjectField.java

@@ -0,0 +1,18 @@
+public interface TraitClassObjectField extends jet.JetObject {
+    TraitClassObjectField.object object$;
+    @org.jetbrains.annotations.Nullable
+    java.lang.String x = "";
+
+    static final class object implements jet.JetObject {
+        @org.jetbrains.annotations.Nullable
+        private final java.lang.String x = "";
+        private final java.lang.String y = "";
+
+        @org.jetbrains.annotations.Nullable
+        public final java.lang.String getX() { /* compiled code */ }
+
+        private final java.lang.String getY() { /* compiled code */ }
+
+        private object() { /* compiled code */ }
+    }
+}

compiler/testData/asJava/nullabilityAnnotations/TraitClassObjectField.kt

@@ -0,0 +1,6 @@
+trait TraitClassObjectField {
+    class object {
+        val x: String? = ""
+        private val y: String? = ""
+    }
+}

compiler/tests/org/jetbrains/jet/asJava/NullabilityAnnotationsTest.java

@@ -77,6 +77,14 @@ public class NullabilityAnnotationsTest extends KotlinAsJavaTestBase {
         doTest(getTestName(false));
     }
 
+    public void testClassObjectField() throws Exception {
+        doTest(getTestName(false));
+    }
+
+    public void testTraitClassObjectField() throws Exception {
+        doTest(getTestName(false));
+    }
+
     private void doTest(@NotNull String fqName) {
         PsiClass psiClass = finder.findClass(fqName, GlobalSearchScope.allScope(getProject()));
         if (!(psiClass instanceof KotlinLightClass)) {