Make constructor of JetTypeImpl private, introduce factory methods

compiler/frontend.java/src/org/jetbrains/kotlin/load/java/sam/SingleAbstractMethodUtils.java

@@ -76,7 +76,7 @@ public class SingleAbstractMethodUtils {
         }
         ClassifierDescriptor classifier = functionType.getConstructor().getDeclarationDescriptor();
         assert classifier instanceof ClassDescriptor : "Not class: " + classifier;
-        return new JetTypeImpl(
+        return JetTypeImpl.create(
                 functionType.getAnnotations(),
                 functionType.getConstructor(),
                 functionType.isMarkedNullable(),

compiler/frontend.java/src/org/jetbrains/kotlin/resolve/jvm/kotlinSignature/PropagationHeuristics.java

@@ -61,7 +61,7 @@ class PropagationHeuristics {
 
                     if (JetTypeChecker.DEFAULT.isSubtypeOf(elementType, elementTypeInSuper)
                         && !JetTypeChecker.DEFAULT.equalTypes(elementType, elementTypeInSuper)) {
-                        JetTypeImpl betterTypeInSuper = new JetTypeImpl(
+                        JetTypeImpl betterTypeInSuper = JetTypeImpl.create(
                                 arrayTypeFromSuper.getAnnotations(),
                                 arrayTypeFromSuper.getConstructor(),
                                 arrayTypeFromSuper.isMarkedNullable(),

compiler/frontend.java/src/org/jetbrains/kotlin/resolve/jvm/kotlinSignature/SignaturesPropagationData.java

@@ -407,7 +407,7 @@ public class SignaturesPropagationData {
             resultScope = autoType.getMemberScope();
         }
 
-        JetTypeImpl type = new JetTypeImpl(autoType.getAnnotations(),
+        JetType type = JetTypeImpl.create(autoType.getAnnotations(),
                                            resultClassifier.getTypeConstructor(),
                                            resultNullable,
                                            resultArguments,

compiler/frontend.java/src/org/jetbrains/kotlin/resolve/jvm/kotlinSignature/TypeTransformingVisitor.java

@@ -157,8 +157,7 @@ public class TypeTransformingVisitor extends JetVisitor<JetType, Void> {
             throw new AssertionError("Unexpected class of type constructor classifier "
                                      + (typeConstructorClassifier == null ? "null" : typeConstructorClassifier.getClass().getName()));
         }
-        return new JetTypeImpl(originalType.getAnnotations(), typeConstructor, false,
-                               altArguments, memberScope);
+        return JetTypeImpl.create(originalType.getAnnotations(), typeConstructor, false, altArguments, memberScope);
     }
 
     @NotNull