Support mapping between Java and Kotlin reflection objects

compiler/testData/codegen/boxWithStdlib/reflection/mapping/extensionProperty.kt

@@ -0,0 +1,27 @@
+import kotlin.reflect.jvm.*
+import kotlin.test.assertEquals
+
+class K(var value: Long)
+
+var K.ext: Double
+    get() = value.toDouble()
+    set(value) {
+        this.value = value.toLong()
+    }
+
+fun box(): String {
+    val p = K::ext
+
+    val getter = p.javaGetter!!
+    val setter = p.javaSetter!!
+
+    assertEquals(getter, Class.forName("_DefaultPackage").getMethod("getExt", javaClass<K>()))
+    assertEquals(setter, Class.forName("_DefaultPackage").getMethod("setExt", javaClass<K>(), javaClass<Double>()))
+
+    val k = K(42L)
+    assert(getter.invoke(null, k) == 42.0, "Fail k getter")
+    setter.invoke(null, k, -239.0)
+    assert(getter.invoke(null, k) == -239.0, "Fail k setter")
+
+    return "OK"
+}

compiler/testData/codegen/boxWithStdlib/reflection/mapping/memberProperty.kt

@@ -0,0 +1,23 @@
+import kotlin.reflect.jvm.*
+import kotlin.test.assertEquals
+
+class K(var value: Long)
+
+fun box(): String {
+    val p = K::value
+
+    assert(p.javaField != null, "Fail p field")
+
+    val getter = p.javaGetter!!
+    val setter = p.javaSetter!!
+
+    assertEquals(getter, javaClass<K>().getMethod("getValue"))
+    assertEquals(setter, javaClass<K>().getMethod("setValue", javaClass<Long>()))
+
+    val k = K(42L)
+    assert(getter.invoke(k) == 42L, "Fail k getter")
+    setter.invoke(k, -239L)
+    assert(getter.invoke(k) == -239L, "Fail k setter")
+
+    return "OK"
+}

compiler/testData/codegen/boxWithStdlib/reflection/mapping/package.kt

@@ -0,0 +1,13 @@
+package test
+
+import kotlin.reflect.jvm.*
+import kotlin.test.*
+
+fun box(): String {
+    val facadeJClass = Class.forName("test.TestPackage") as Class<Any>
+
+    assertEquals(facadeJClass, facadeJClass.kotlinPackage.javaFacade)
+    assertEquals(facadeJClass, facadeJClass.kotlin.java)
+
+    return "OK"
+}

compiler/testData/codegen/boxWithStdlib/reflection/mapping/topLevelProperty.kt

@@ -0,0 +1,23 @@
+import kotlin.reflect.jvm.*
+import kotlin.test.assertEquals
+
+var topLevel = "123"
+
+fun box(): String {
+    val p = ::topLevel
+
+    // TODO: uncomment when fields are loaded from package parts
+    // assert(p.javaField != null, "Fail p field")
+
+    val getter = p.javaGetter!!
+    val setter = p.javaSetter!!
+
+    assertEquals(getter, Class.forName("_DefaultPackage").getMethod("getTopLevel"))
+    assertEquals(setter, Class.forName("_DefaultPackage").getMethod("setTopLevel", javaClass<String>()))
+
+    assert(getter.invoke(null) == "123", "Fail k getter")
+    setter.invoke(null, "456")
+    assert(getter.invoke(null) == "456", "Fail k setter")
+
+    return "OK"
+}