KtLightClassForDecompiledDeclaration is now marked by KtLightClassMarker

Rename: KtJavaMirrorMarker -> KtLightClassMarker
Introduce code to be able to tell light classes from source and binaries apart in 'frontend.java'

compiler/frontend.java/src/org/jetbrains/kotlin/asJava/KtLightClassMarker.kt

@@ -14,7 +14,10 @@
  * limitations under the License.
  */
 
-package org.jetbrains.kotlin.asJava;
+package org.jetbrains.kotlin.asJava
 
-public interface KtJavaMirrorMarker {
+import org.jetbrains.kotlin.load.java.structure.LightClassOriginKind
+
+interface KtLightClassMarker {
+    val originKind: LightClassOriginKind
 }

compiler/frontend.java/src/org/jetbrains/kotlin/load/java/JavaClassFinderImpl.java

@@ -24,7 +24,7 @@ import com.intellij.psi.search.DelegatingGlobalSearchScope;
 import com.intellij.psi.search.GlobalSearchScope;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
-import org.jetbrains.kotlin.asJava.KtJavaMirrorMarker;
+import org.jetbrains.kotlin.asJava.KtLightClassMarker;
 import org.jetbrains.kotlin.idea.KotlinFileType;
 import org.jetbrains.kotlin.load.java.structure.JavaClass;
 import org.jetbrains.kotlin.load.java.structure.JavaPackage;
@@ -107,7 +107,7 @@ public class JavaClassFinderImpl implements JavaClassFinder {
             throw new IllegalStateException("Requested " + fqName + ", got " + javaClass.getFqName());
         }
 
-        if (psiClass instanceof KtJavaMirrorMarker) {
+        if (psiClass instanceof KtLightClassMarker) {
             throw new IllegalStateException("Kotlin light classes should not be found by JavaPsiFacade, resolving: " + fqName);
         }
 

compiler/frontend.java/src/org/jetbrains/kotlin/load/java/structure/impl/JavaClassImpl.java

@@ -22,7 +22,7 @@ import kotlin.collections.CollectionsKt;
 import kotlin.jvm.functions.Function1;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
-import org.jetbrains.kotlin.asJava.KtJavaMirrorMarker;
+import org.jetbrains.kotlin.asJava.KtLightClassMarker;
 import org.jetbrains.kotlin.descriptors.Visibility;
 import org.jetbrains.kotlin.load.java.structure.*;
 import org.jetbrains.kotlin.name.FqName;
@@ -154,9 +154,14 @@ public class JavaClassImpl extends JavaClassifierImpl<PsiClass> implements JavaC
         return JavaElementUtil.getVisibility(this);
     }
 
+    @Nullable
     @Override
-    public boolean isKotlinLightClass() {
-        return getPsi() instanceof KtJavaMirrorMarker;
+    public LightClassOriginKind getLightClassOriginKind() {
+        PsiClass psiClass = getPsi();
+        if (psiClass instanceof KtLightClassMarker) {
+            return ((KtLightClassMarker) psiClass).getOriginKind();
+        }
+        return null;
     }
 
     @Nullable