diff --git a/compiler/javac-wrapper/src/org/jetbrains/kotlin/javac/resolve/KotlinClassifiersCache.kt b/compiler/javac-wrapper/src/org/jetbrains/kotlin/javac/resolve/KotlinClassifiersCache.kt
index d9e23b02dd3..3326f3a68ba 100644
--- a/compiler/javac-wrapper/src/org/jetbrains/kotlin/javac/resolve/KotlinClassifiersCache.kt
+++ b/compiler/javac-wrapper/src/org/jetbrains/kotlin/javac/resolve/KotlinClassifiersCache.kt
@@ -125,6 +125,9 @@ class MockKotlinClassifier(override val classId: ClassId,
                             cache.createMockKotlinClassifier(nestedClassOrObject, ktFile, classId.createNestedClassId(nestedClassOrObject.nameAsSafeName))
                         } ?: emptyList()
 
+    override val isFromSource: Boolean
+        get() = true
+
     override val lightClassOriginKind
         get() = LightClassOriginKind.SOURCE
 
@@ -198,6 +201,7 @@ class MockKotlinField(private val psiField: PsiField) : JavaField {
     override val type get() = shouldNotBeCalled()
     override val hasConstantNotNullInitializer get() = shouldNotBeCalled()
     override fun findAnnotation(fqName: FqName) = shouldNotBeCalled()
+    override val isFromSource: Boolean get() = shouldNotBeCalled()
 }
 
 private fun KtClassOrObject.computeClassId(): ClassId? =
diff --git a/compiler/javac-wrapper/src/org/jetbrains/kotlin/javac/wrappers/symbols/SymbolBasedClassifier.kt b/compiler/javac-wrapper/src/org/jetbrains/kotlin/javac/wrappers/symbols/SymbolBasedClassifier.kt
index 2fe03699070..822ca731c82 100644
--- a/compiler/javac-wrapper/src/org/jetbrains/kotlin/javac/wrappers/symbols/SymbolBasedClassifier.kt
+++ b/compiler/javac-wrapper/src/org/jetbrains/kotlin/javac/wrappers/symbols/SymbolBasedClassifier.kt
@@ -28,6 +28,9 @@ abstract class SymbolBasedClassifier<out T : Element>(
         javac: JavacWrapper
 ) : SymbolBasedElement<T>(element, javac), JavaClassifier, JavaAnnotationOwner {
 
+    override val isFromSource: Boolean
+        get() = true
+
     override val annotations: Collection<JavaAnnotation>
         get() = element.annotationMirrors.map { SymbolBasedAnnotation(it, javac) }
 
diff --git a/compiler/javac-wrapper/src/org/jetbrains/kotlin/javac/wrappers/symbols/SymbolBasedMember.kt b/compiler/javac-wrapper/src/org/jetbrains/kotlin/javac/wrappers/symbols/SymbolBasedMember.kt
index 4cd1c742d27..c59751a4a74 100644
--- a/compiler/javac-wrapper/src/org/jetbrains/kotlin/javac/wrappers/symbols/SymbolBasedMember.kt
+++ b/compiler/javac-wrapper/src/org/jetbrains/kotlin/javac/wrappers/symbols/SymbolBasedMember.kt
@@ -31,6 +31,9 @@ abstract class SymbolBasedMember<out T : Element>(
         javac: JavacWrapper
 ) : SymbolBasedElement<T>(element, javac), JavaMember {
 
+    override val isFromSource: Boolean
+        get() = true
+
     override val annotations: Collection<JavaAnnotation>
         get() = element.annotationMirrors.map { SymbolBasedAnnotation(it, javac) }
 
diff --git a/compiler/javac-wrapper/src/org/jetbrains/kotlin/javac/wrappers/symbols/SymbolBasedValueParameter.kt b/compiler/javac-wrapper/src/org/jetbrains/kotlin/javac/wrappers/symbols/SymbolBasedValueParameter.kt
index 58acf2af8bd..54001590d0a 100644
--- a/compiler/javac-wrapper/src/org/jetbrains/kotlin/javac/wrappers/symbols/SymbolBasedValueParameter.kt
+++ b/compiler/javac-wrapper/src/org/jetbrains/kotlin/javac/wrappers/symbols/SymbolBasedValueParameter.kt
@@ -43,7 +43,10 @@ class SymbolBasedValueParameter(
     override val name: Name
         get() = Name.identifier(elementName)
 
+    override val isFromSource: Boolean
+        get() = true
+
     override val type: JavaType
         get() = SymbolBasedType.create(element.asType(), javac)
 
-}
\ No newline at end of file
+}
diff --git a/compiler/javac-wrapper/src/org/jetbrains/kotlin/javac/wrappers/trees/TreeBasedClass.kt b/compiler/javac-wrapper/src/org/jetbrains/kotlin/javac/wrappers/trees/TreeBasedClass.kt
index cfb50104589..de034c743aa 100644
--- a/compiler/javac-wrapper/src/org/jetbrains/kotlin/javac/wrappers/trees/TreeBasedClass.kt
+++ b/compiler/javac-wrapper/src/org/jetbrains/kotlin/javac/wrappers/trees/TreeBasedClass.kt
@@ -40,6 +40,9 @@ class TreeBasedClass(
         override val outerClass: JavaClass?
 ) : TreeBasedElement<JCTree.JCClassDecl>(tree, compilationUnit, javac), JavaClassWithClassId {
 
+    override val isFromSource: Boolean
+        get() = true
+
     override val name: Name
         get() = Name.identifier(tree.simpleName.toString())
 
diff --git a/compiler/javac-wrapper/src/org/jetbrains/kotlin/javac/wrappers/trees/TreeBasedMember.kt b/compiler/javac-wrapper/src/org/jetbrains/kotlin/javac/wrappers/trees/TreeBasedMember.kt
index 871fb23e13b..168b5df6a80 100644
--- a/compiler/javac-wrapper/src/org/jetbrains/kotlin/javac/wrappers/trees/TreeBasedMember.kt
+++ b/compiler/javac-wrapper/src/org/jetbrains/kotlin/javac/wrappers/trees/TreeBasedMember.kt
@@ -30,6 +30,9 @@ abstract class TreeBasedMember<out T : JCTree>(
         javac: JavacWrapper
 ) : TreeBasedElement<T>(tree, compilationUnit, javac), JavaMember {
 
+    override val isFromSource: Boolean
+        get() = true
+
     override val isDeprecatedInJavaDoc: Boolean
         get() = javac.isDeprecatedInJavaDoc(tree, compilationUnit)
 
@@ -39,6 +42,6 @@ abstract class TreeBasedMember<out T : JCTree>(
     override fun findAnnotation(fqName: FqName) =
             annotations
                     .filter { it.annotation.annotationType.toString().endsWith(fqName.shortName().asString()) }
-                    .find { it.classId?.asSingleFqName() == fqName }
+                    .find { it.classId.asSingleFqName() == fqName }
 
-}
\ No newline at end of file
+}
diff --git a/compiler/javac-wrapper/src/org/jetbrains/kotlin/javac/wrappers/trees/TreeBasedTypeParameter.kt b/compiler/javac-wrapper/src/org/jetbrains/kotlin/javac/wrappers/trees/TreeBasedTypeParameter.kt
index 354771fb09e..cda03da0374 100644
--- a/compiler/javac-wrapper/src/org/jetbrains/kotlin/javac/wrappers/trees/TreeBasedTypeParameter.kt
+++ b/compiler/javac-wrapper/src/org/jetbrains/kotlin/javac/wrappers/trees/TreeBasedTypeParameter.kt
@@ -33,6 +33,9 @@ class TreeBasedTypeParameter(
         private val containingElement: JavaElement
 ) : TreeBasedElement<JCTree.JCTypeParameter>(tree, compilationUnit, javac), JavaTypeParameter {
 
+    override val isFromSource: Boolean
+        get() = true
+
     override val name: Name
         get() = Name.identifier(tree.name.toString())
 
@@ -62,4 +65,4 @@ class TreeBasedTypeParameter(
         return result
     }
 
-}
\ No newline at end of file
+}
diff --git a/compiler/javac-wrapper/src/org/jetbrains/kotlin/javac/wrappers/trees/TreeBasedValueParameter.kt b/compiler/javac-wrapper/src/org/jetbrains/kotlin/javac/wrappers/trees/TreeBasedValueParameter.kt
index d68c7bc1a65..c0f44e28085 100644
--- a/compiler/javac-wrapper/src/org/jetbrains/kotlin/javac/wrappers/trees/TreeBasedValueParameter.kt
+++ b/compiler/javac-wrapper/src/org/jetbrains/kotlin/javac/wrappers/trees/TreeBasedValueParameter.kt
@@ -40,7 +40,7 @@ class TreeBasedValueParameter(
     override fun findAnnotation(fqName: FqName) =
             annotations
                     .filter { it.annotation.annotationType.toString().endsWith(fqName.shortName().asString()) }
-                    .find { it.classId?.asSingleFqName() == fqName }
+                    .find { it.classId.asSingleFqName() == fqName }
 
     override val isDeprecatedInJavaDoc: Boolean
         get() = javac.isDeprecatedInJavaDoc(tree, compilationUnit)
@@ -48,9 +48,12 @@ class TreeBasedValueParameter(
     override val name: Name
         get() = Name.identifier(tree.name.toString())
 
+    override val isFromSource: Boolean
+        get() = true
+
     override val type: JavaType
         get() = TreeBasedType.create(tree.getType(), compilationUnit, javac, annotations, containingElement)
 
     override val isVararg: Boolean
         get() = tree.modifiers.flags and Flags.VARARGS != 0L
-}
\ No newline at end of file
+}
diff --git a/compiler/resolution.common.jvm/src/org/jetbrains/kotlin/load/java/structure/impl/JavaClassifierImpl.java b/compiler/resolution.common.jvm/src/org/jetbrains/kotlin/load/java/structure/impl/JavaClassifierImpl.java
index fca259a6bec..53a13c06626 100644
--- a/compiler/resolution.common.jvm/src/org/jetbrains/kotlin/load/java/structure/impl/JavaClassifierImpl.java
+++ b/compiler/resolution.common.jvm/src/org/jetbrains/kotlin/load/java/structure/impl/JavaClassifierImpl.java
@@ -41,6 +41,11 @@ public abstract class JavaClassifierImpl<Psi extends PsiClass> extends JavaEleme
         }
     }
 
+    @Override
+    public final boolean isFromSource() {
+        return true;
+    }
+
     @NotNull
     @Override
     public Collection<JavaAnnotation> getAnnotations() {
diff --git a/compiler/resolution.common.jvm/src/org/jetbrains/kotlin/load/java/structure/impl/JavaMemberImpl.java b/compiler/resolution.common.jvm/src/org/jetbrains/kotlin/load/java/structure/impl/JavaMemberImpl.java
index 250485886a1..5b1f96e6f48 100644
--- a/compiler/resolution.common.jvm/src/org/jetbrains/kotlin/load/java/structure/impl/JavaMemberImpl.java
+++ b/compiler/resolution.common.jvm/src/org/jetbrains/kotlin/load/java/structure/impl/JavaMemberImpl.java
@@ -51,6 +51,11 @@ public abstract class JavaMemberImpl<Psi extends PsiMember> extends JavaElementI
         return Name.identifier(name);
     }
 
+    @Override
+    public final boolean isFromSource() {
+        return true;
+    }
+
     @NotNull
     @Override
     public JavaClass getContainingClass() {
diff --git a/compiler/resolution.common.jvm/src/org/jetbrains/kotlin/load/java/structure/impl/JavaValueParameterImpl.java b/compiler/resolution.common.jvm/src/org/jetbrains/kotlin/load/java/structure/impl/JavaValueParameterImpl.java
index cca18130e04..c34f469899d 100644
--- a/compiler/resolution.common.jvm/src/org/jetbrains/kotlin/load/java/structure/impl/JavaValueParameterImpl.java
+++ b/compiler/resolution.common.jvm/src/org/jetbrains/kotlin/load/java/structure/impl/JavaValueParameterImpl.java
@@ -58,6 +58,11 @@ public class JavaValueParameterImpl extends JavaElementImpl<PsiParameter>
         return false;
     }
 
+    @Override
+    public boolean isFromSource() {
+        return true;
+    }
+
     @NotNull
     @Override
     public Visibility getVisibility() {
diff --git a/compiler/resolution.common.jvm/src/org/jetbrains/kotlin/load/java/structure/impl/classFiles/BinaryJavaClass.kt b/compiler/resolution.common.jvm/src/org/jetbrains/kotlin/load/java/structure/impl/classFiles/BinaryJavaClass.kt
index af5f21e3a23..285c9f67335 100644
--- a/compiler/resolution.common.jvm/src/org/jetbrains/kotlin/load/java/structure/impl/classFiles/BinaryJavaClass.kt
+++ b/compiler/resolution.common.jvm/src/org/jetbrains/kotlin/load/java/structure/impl/classFiles/BinaryJavaClass.kt
@@ -45,6 +45,8 @@ class BinaryJavaClass(
     override lateinit var typeParameters: List<JavaTypeParameter>
     override lateinit var supertypes: List<JavaClassifierType>
 
+    override val isFromSource: Boolean get() = false
+
     override val methods = arrayListOf<JavaMethod>()
     override val fields = arrayListOf<JavaField>()
     override val constructors = arrayListOf<JavaConstructor>()
diff --git a/compiler/resolution.common.jvm/src/org/jetbrains/kotlin/load/java/structure/impl/classFiles/Methods.kt b/compiler/resolution.common.jvm/src/org/jetbrains/kotlin/load/java/structure/impl/classFiles/Methods.kt
index e3c5264d896..d69f1e6b91a 100644
--- a/compiler/resolution.common.jvm/src/org/jetbrains/kotlin/load/java/structure/impl/classFiles/Methods.kt
+++ b/compiler/resolution.common.jvm/src/org/jetbrains/kotlin/load/java/structure/impl/classFiles/Methods.kt
@@ -37,6 +37,7 @@ abstract class BinaryJavaMethodBase(
 ) : JavaMember, BinaryJavaModifierListOwner, MutableJavaAnnotationOwner {
     override val annotations: MutableCollection<JavaAnnotation> = SmartList()
     override val annotationsByFqName by buildLazyValueForMap()
+    override val isFromSource: Boolean get() = false
 
     companion object {
         private class MethodInfo(
diff --git a/compiler/resolution.common.jvm/src/org/jetbrains/kotlin/load/java/structure/impl/classFiles/Other.kt b/compiler/resolution.common.jvm/src/org/jetbrains/kotlin/load/java/structure/impl/classFiles/Other.kt
index 111ac9ac6b2..23f23727bd8 100644
--- a/compiler/resolution.common.jvm/src/org/jetbrains/kotlin/load/java/structure/impl/classFiles/Other.kt
+++ b/compiler/resolution.common.jvm/src/org/jetbrains/kotlin/load/java/structure/impl/classFiles/Other.kt
@@ -33,6 +33,7 @@ class BinaryJavaField(
 ) : JavaField, BinaryJavaModifierListOwner, MutableJavaAnnotationOwner {
     override val annotations: MutableCollection<JavaAnnotation> = SmartList()
     override val annotationsByFqName by buildLazyValueForMap()
+    override val isFromSource: Boolean get() = false
 
     override val hasConstantNotNullInitializer: Boolean
         get() = initializerValue != null
@@ -46,6 +47,8 @@ class BinaryJavaTypeParameter(
 ) : JavaTypeParameter, ListBasedJavaAnnotationOwner, MutableJavaAnnotationOwner {
     override val annotations: MutableCollection<JavaAnnotation> = SmartList()
     override val isDeprecatedInJavaDoc = false
+    override val isFromSource: Boolean
+        get() = false
 }
 
 class BinaryJavaValueParameter(
@@ -57,6 +60,9 @@ class BinaryJavaValueParameter(
 
     override var name: Name? = null
 
+    override val isFromSource: Boolean
+        get() = false
+
     internal fun updateName(newName: Name) {
         assert(name == null) { "Parameter can't have two names: $name and $newName" }
         name = newName
@@ -69,6 +75,8 @@ class BinaryJavaRecordComponent(
     override val type: JavaType,
     override val isVararg: Boolean,
 ) : JavaRecordComponent, BinaryJavaModifierListOwner {
+    override val isFromSource: Boolean get() = false
+
     override val annotations: Collection<JavaAnnotation>
         get() = emptyList()
 
diff --git a/core/compiler.common.jvm/src/org/jetbrains/kotlin/load/java/structure/javaElements.kt b/core/compiler.common.jvm/src/org/jetbrains/kotlin/load/java/structure/javaElements.kt
index c32b9e35062..5b308973a26 100644
--- a/core/compiler.common.jvm/src/org/jetbrains/kotlin/load/java/structure/javaElements.kt
+++ b/core/compiler.common.jvm/src/org/jetbrains/kotlin/load/java/structure/javaElements.kt
@@ -25,6 +25,7 @@ interface JavaElement
 
 interface JavaNamedElement : JavaElement {
     val name: Name
+    val isFromSource: Boolean
 }
 
 interface JavaAnnotationOwner : JavaElement {
@@ -145,6 +146,7 @@ interface JavaValueParameter : JavaAnnotationOwner {
     val name: Name?
     val type: JavaType
     val isVararg: Boolean
+    val isFromSource: Boolean
 }
 
 interface JavaRecordComponent : JavaMember {
diff --git a/core/descriptors.runtime/src/org/jetbrains/kotlin/descriptors/runtime/structure/ReflectJavaClass.kt b/core/descriptors.runtime/src/org/jetbrains/kotlin/descriptors/runtime/structure/ReflectJavaClass.kt
index ebd606a89c6..4cf9eaa6326 100644
--- a/core/descriptors.runtime/src/org/jetbrains/kotlin/descriptors/runtime/structure/ReflectJavaClass.kt
+++ b/core/descriptors.runtime/src/org/jetbrains/kotlin/descriptors/runtime/structure/ReflectJavaClass.kt
@@ -33,6 +33,8 @@ class ReflectJavaClass(
 
     override val modifiers: Int get() = klass.modifiers
 
+    override val isFromSource: Boolean get() = false
+
     override val innerClassNames: List<Name>
         get() = klass.declaredClasses
             .asSequence()
diff --git a/core/descriptors.runtime/src/org/jetbrains/kotlin/descriptors/runtime/structure/ReflectJavaMember.kt b/core/descriptors.runtime/src/org/jetbrains/kotlin/descriptors/runtime/structure/ReflectJavaMember.kt
index 2322239c704..12bf818bec3 100644
--- a/core/descriptors.runtime/src/org/jetbrains/kotlin/descriptors/runtime/structure/ReflectJavaMember.kt
+++ b/core/descriptors.runtime/src/org/jetbrains/kotlin/descriptors/runtime/structure/ReflectJavaMember.kt
@@ -28,6 +28,8 @@ import java.lang.reflect.Type
 abstract class ReflectJavaMember : ReflectJavaElement(), ReflectJavaAnnotationOwner, ReflectJavaModifierListOwner, JavaMember {
     abstract val member: Member
 
+    final override val isFromSource: Boolean get() = false
+
     override val element: AnnotatedElement get() = member as AnnotatedElement
 
     override val modifiers: Int get() = member.modifiers
diff --git a/core/descriptors.runtime/src/org/jetbrains/kotlin/descriptors/runtime/structure/ReflectJavaTypeParameter.kt b/core/descriptors.runtime/src/org/jetbrains/kotlin/descriptors/runtime/structure/ReflectJavaTypeParameter.kt
index 56a9b9cb4d7..b2839c811c6 100644
--- a/core/descriptors.runtime/src/org/jetbrains/kotlin/descriptors/runtime/structure/ReflectJavaTypeParameter.kt
+++ b/core/descriptors.runtime/src/org/jetbrains/kotlin/descriptors/runtime/structure/ReflectJavaTypeParameter.kt
@@ -31,6 +31,8 @@ class ReflectJavaTypeParameter(
             return bounds
         }
 
+    override val isFromSource: Boolean get() = false
+
     @Suppress("USELESS_CAST")
     override val element: AnnotatedElement?
         // TypeVariable is AnnotatedElement only in JDK8
diff --git a/core/descriptors.runtime/src/org/jetbrains/kotlin/descriptors/runtime/structure/ReflectJavaValueParameter.kt b/core/descriptors.runtime/src/org/jetbrains/kotlin/descriptors/runtime/structure/ReflectJavaValueParameter.kt
index ab86031e83e..96d9ebac7ae 100644
--- a/core/descriptors.runtime/src/org/jetbrains/kotlin/descriptors/runtime/structure/ReflectJavaValueParameter.kt
+++ b/core/descriptors.runtime/src/org/jetbrains/kotlin/descriptors/runtime/structure/ReflectJavaValueParameter.kt
@@ -38,5 +38,8 @@ class ReflectJavaValueParameter(
     override val name: Name?
         get() = reflectName?.let(Name::guessByFirstCharacter)
 
+    override val isFromSource: Boolean
+        get() = false
+
     override fun toString() = this::class.java.name + ": " + (if (isVararg) "vararg " else "") + name + ": " + type
 }