Singleton made thread-safe in JavaToKotlinClassMap

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

@@ -47,7 +47,7 @@ public class JvmRuntimeTypes {
         this.reflectionTypes = reflectionTypes;
 
         ModuleDescriptor fakeModule = new ModuleDescriptorImpl(Name.special("<fake module for functions impl>"),
-                                                               Collections.<ImportPath>emptyList(), JavaToKotlinClassMap.getInstance());
+                                                               Collections.<ImportPath>emptyList(), JavaToKotlinClassMap.INSTANCE);
 
         PackageFragmentDescriptor kotlinJvmInternal =
                 new MutablePackageFragmentDescriptor(fakeModule, new FqName("kotlin.jvm.internal"));

compiler/frontend.java/src/org/jetbrains/jet/lang/resolve/java/JvmAnalyzerFacade.kt

@@ -78,6 +78,6 @@ public object JvmAnalyzerFacade : AnalyzerFacade<JvmResolverForModule, JvmPlatfo
     }
 
     override val defaultImports = TopDownAnalyzerFacadeForJVM.DEFAULT_IMPORTS
-    override val platformToKotlinClassMap = JavaToKotlinClassMap.getInstance()
+    override val platformToKotlinClassMap = JavaToKotlinClassMap.INSTANCE
 
 }

compiler/frontend.java/src/org/jetbrains/jet/lang/resolve/java/TopDownAnalyzerFacadeForJVM.java

@@ -148,7 +148,7 @@ public enum TopDownAnalyzerFacadeForJVM {
     public static ModuleDescriptorImpl createJavaModule(@NotNull String name) {
         return new ModuleDescriptorImpl(Name.special(name),
                                         DEFAULT_IMPORTS,
-                                        JavaToKotlinClassMap.getInstance());
+                                        JavaToKotlinClassMap.INSTANCE);
     }
 
     @NotNull

compiler/frontend.java/src/org/jetbrains/jet/lang/resolve/java/kotlinSignature/TypeTransformingVisitor.java

@@ -219,7 +219,7 @@ public class TypeTransformingVisitor extends JetVisitor<JetType, Void> {
         FqName javaFqName = KotlinToJavaTypesMap.getInstance().getKotlinToJavaFqName(originalClassFqName);
         if (javaFqName == null) return null;
 
-        Collection<ClassDescriptor> descriptors = JavaToKotlinClassMap.getInstance().mapPlatformClass(javaFqName);
+        Collection<ClassDescriptor> descriptors = JavaToKotlinClassMap.INSTANCE.mapPlatformClass(javaFqName);
         for (ClassDescriptor descriptor : descriptors) {
             String fqName = DescriptorUtils.getFqName(descriptor).asString();
             if (isSameName(qualifiedName, fqName)) {

compiler/tests/org/jetbrains/jet/jvm/compiler/AbstractSdkAnnotationsValidityTest.java

@@ -125,7 +125,7 @@ public abstract class AbstractSdkAnnotationsValidityTest extends UsefulTestCase
         @Override
         public Void visitClassDescriptor(ClassDescriptor descriptor, Void data) {
             // skip java.util.Collection, etc.
-            if (!JavaToKotlinClassMap.getInstance().mapPlatformClass(DescriptorUtils.getFqNameSafe(descriptor)).isEmpty()) {
+            if (!JavaToKotlinClassMap.INSTANCE.mapPlatformClass(DescriptorUtils.getFqNameSafe(descriptor)).isEmpty()) {
                 return null;
             }
 

core/descriptor.loader.java/src/org/jetbrains/jet/lang/resolve/java/lazy/descriptors/LazyJavaAnnotationDescriptor.kt

@@ -63,7 +63,7 @@ class LazyJavaAnnotationDescriptor(
     private val type = c.storageManager.createLazyValue {(): JetType ->
         val fqName = fqName()
         if (fqName == null) return@createLazyValue ErrorUtils.createErrorType("No fqName: $javaAnnotation")
-        val annotationClass = JavaToKotlinClassMap.getInstance().mapKotlinClass(fqName, TypeUsage.MEMBER_SIGNATURE_INVARIANT)
+        val annotationClass = JavaToKotlinClassMap.INSTANCE.mapKotlinClass(fqName, TypeUsage.MEMBER_SIGNATURE_INVARIANT)
                 ?: javaAnnotation.resolve()?.let { javaClass -> c.moduleClassResolver.resolveClass(javaClass) }
         annotationClass?.getDefaultType() ?: ErrorUtils.createErrorType(fqName.asString())
     }

core/descriptor.loader.java/src/org/jetbrains/jet/lang/resolve/java/lazy/types/LazyJavaTypeResolver.kt

@@ -46,7 +46,7 @@ class LazyJavaTypeResolver(
         return when (javaType) {
             is JavaPrimitiveType -> {
                 val canonicalText = javaType.getCanonicalText()
-                val jetType = JavaToKotlinClassMap.getInstance().mapPrimitiveKotlinClass(canonicalText)
+                val jetType = JavaToKotlinClassMap.INSTANCE.mapPrimitiveKotlinClass(canonicalText)
                 assert(jetType != null, "Primitive type is not found: " + canonicalText)
                 jetType!!
             }
@@ -65,7 +65,7 @@ class LazyJavaTypeResolver(
     public fun transformArrayType(arrayType: JavaArrayType, attr: JavaTypeAttributes, isVararg: Boolean = false): JetType {
         val javaComponentType = arrayType.getComponentType()
         if (javaComponentType is JavaPrimitiveType) {
-            val jetType = JavaToKotlinClassMap.getInstance().mapPrimitiveKotlinClass("[" + javaComponentType.getCanonicalText())
+            val jetType = JavaToKotlinClassMap.INSTANCE.mapPrimitiveKotlinClass("[" + javaComponentType.getCanonicalText())
             if (jetType != null) {
                 return if (PLATFORM_TYPES && attr.allowFlexible)
                            FlexibleJavaClassifierTypeCapabilities.create(jetType, TypeUtils.makeNullable(jetType))
@@ -117,7 +117,7 @@ class LazyJavaTypeResolver(
                     val fqName = classifier.getFqName()
                             .sure("Class type should have a FQ name: " + classifier)
 
-                    val javaToKotlinClassMap = JavaToKotlinClassMap.getInstance()
+                    val javaToKotlinClassMap = JavaToKotlinClassMap.INSTANCE
                     val howThisTypeIsUsedEffectively = when {
                         attr.flexibility == FLEXIBLE_LOWER_BOUND -> MEMBER_SIGNATURE_COVARIANT
                         attr.flexibility == FLEXIBLE_UPPER_BOUND -> MEMBER_SIGNATURE_CONTRAVARIANT

core/descriptor.loader.java/src/org/jetbrains/jet/lang/resolve/java/mapping/JavaToKotlinClassMap.java

@@ -33,15 +33,7 @@ import org.jetbrains.jet.lang.types.lang.PrimitiveType;
 import java.util.*;
 
 public class JavaToKotlinClassMap extends JavaToKotlinClassMapBuilder implements PlatformToKotlinClassMap {
-    private static JavaToKotlinClassMap instance = null;
-
-    @NotNull
-    public static JavaToKotlinClassMap getInstance() {
-        if (instance == null) {
-            instance = new JavaToKotlinClassMap();
-        }
-        return instance;
-    }
+    public static final JavaToKotlinClassMap INSTANCE = new JavaToKotlinClassMap();
 
     private final Map<FqName, ClassDescriptor> classDescriptorMap = new HashMap<FqName, ClassDescriptor>();
     private final Map<FqName, ClassDescriptor> classDescriptorMapForCovariantPositions = new HashMap<FqName, ClassDescriptor>();

idea/src/org/jetbrains/jet/plugin/debugger/evaluate/KotlinEvaluationBuilder.kt

@@ -482,7 +482,7 @@ fun Type.getClassDescriptor(project: Project): ClassDescriptor? {
 
     val jvmName = JvmClassName.byInternalName(getInternalName()).getFqNameForClassNameWithoutDollars()
 
-    val platformClasses = JavaToKotlinClassMap.getInstance().mapPlatformClass(jvmName)
+    val platformClasses = JavaToKotlinClassMap.INSTANCE.mapPlatformClass(jvmName)
     if (platformClasses.notEmpty) return platformClasses.first()
 
     return runReadAction {

j2k/src/org/jetbrains/jet/j2k/ast/Imports.kt

@@ -68,7 +68,7 @@ private fun Converter.filterImport(name: String, ref: PsiJavaCodeReferenceElemen
     if (name in annotationConverter.annotationsToRemove) return null
 
     // If imported class has a kotlin analog, drop the import
-    if (!JavaToKotlinClassMap.getInstance().mapPlatformClass(FqName(name)).isEmpty()) return null
+    if (!JavaToKotlinClassMap.INSTANCE.mapPlatformClass(FqName(name)).isEmpty()) return null
 
     val target = ref.resolve()
     if (target is KotlinLightClassForPackage) {