Temporarily caching resolved classes in the trace (for existing code in the IDE to be happy)

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

@@ -151,11 +151,16 @@ public class LazyJavaClassMemberScope(
         val jNestedClass = nestedClassIndex()[name]
         if (jNestedClass == null)
             null
-        else
-            LazyJavaClassDescriptor(c,
+        else {
+            // TODO: this caching is a temporary workaround, should be replaced with properly caching the whole LazyJavaSubModule
+            val alreadyResolved = c.javaResolverCache.getClass(jNestedClass)
+            if (alreadyResolved != null)
+                alreadyResolved
+            else LazyJavaClassDescriptor(c,
                                     getContainingDeclaration(),
                                     DescriptorUtils.getFQName(getContainingDeclaration()).child(name).toSafe(),
                                     jNestedClass)
+        }
     }
 
     override fun getClassifier(name: Name): ClassifierDescriptor? = if (enumClassObject) null else nestedClasses(name)

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

@@ -27,8 +27,14 @@ public abstract class LazyJavaPackageFragmentScope(
         val javaClass = c.finder.findClass(fqName)
         if (javaClass == null)
             c.javaClassResolver.resolveClassByFqName(fqName)
-        else
-            LazyJavaClassDescriptor(c.withTypes(TypeParameterResolver.EMPTY), packageFragment, fqName, javaClass)
+        else {
+            // TODO: this caching is a temporary workaround, should be replaced with properly caching the whole LazyJavaSubModule
+            val cached = c.javaResolverCache.getClass(javaClass)
+            if (cached != null)
+                cached
+            else
+                LazyJavaClassDescriptor(c.withTypes(TypeParameterResolver.EMPTY), packageFragment, fqName, javaClass)
+        }
     }
 
     protected fun computeMemberIndexForSamConstructors(delegate: MemberIndex): MemberIndex = object : MemberIndex by delegate {