Moved getPackageFilesWithCallables to frontend.java and reused it.

compiler/jet.as.java.psi/src/org/jetbrains/jet/asJava/JavaElementFinder.java

@@ -37,6 +37,7 @@ import org.jetbrains.annotations.Nullable;
 import org.jetbrains.jet.lang.psi.*;
 import org.jetbrains.jet.lang.resolve.java.JavaPsiFacadeKotlinHacks;
 import org.jetbrains.jet.lang.resolve.java.PackageClassUtils;
+import org.jetbrains.jet.lang.resolve.kotlin.PackagePartClassUtils;
 import org.jetbrains.jet.lang.resolve.name.FqName;
 import org.jetbrains.jet.lang.resolve.name.NamePackage;
 
@@ -141,7 +142,7 @@ public class JavaElementFinder extends PsiElementFinder implements JavaPsiFacade
 
     private void findPackageClass(FqName qualifiedName, GlobalSearchScope scope, List<PsiClass> answer) {
         Collection<JetFile> filesForPackage = lightClassGenerationSupport.findFilesForPackage(qualifiedName, scope);
-        if (!shouldGeneratePackageClass(filesForPackage)) return;
+        if (PackagePartClassUtils.getPackageFilesWithCallables(filesForPackage).isEmpty()) return;
 
         KotlinLightClassForPackage lightClass = KotlinLightClassForPackage.create(psiManager, qualifiedName, scope, filesForPackage);
         if (lightClass == null) return;
@@ -155,18 +156,6 @@ public class JavaElementFinder extends PsiElementFinder implements JavaPsiFacade
         }
     }
 
-    private static boolean shouldGeneratePackageClass(@NotNull Collection<JetFile> packageFiles) {
-        for (JetFile file : packageFiles) {
-            for (JetDeclaration declaration : file.getDeclarations()) {
-                if (declaration instanceof JetProperty || declaration instanceof JetNamedFunction) {
-                    return true;
-                }
-            }
-        }
-
-        return false;
-    }
-
     @NotNull
     @Override
     public Set<String> getClassNames(@NotNull PsiPackage psiPackage, @NotNull GlobalSearchScope scope) {