1 /*
2 * Copyright (C) 2008 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "class_linker.h"
18 #include "jni_internal.h"
19 #include "mirror/art_method.h"
20 #include "mirror/art_method-inl.h"
21 #include "mirror/class-inl.h"
22 #include "mirror/object-inl.h"
23 #include "object_utils.h"
24 #include "reflection.h"
25 #include "scoped_thread_state_change.h"
26 #include "well_known_classes.h"
27
28 namespace art {
29
30 /*
31 * We get here through Constructor.newInstance(). The Constructor object
32 * would not be available if the constructor weren't public (per the
33 * definition of Class.getConstructor), so we can skip the method access
34 * check. We can also safely assume the constructor isn't associated
35 * with an interface, array, or primitive class.
36 */
Constructor_newInstance(JNIEnv * env,jobject javaMethod,jobjectArray javaArgs)37 static jobject Constructor_newInstance(JNIEnv* env, jobject javaMethod, jobjectArray javaArgs) {
38 ScopedObjectAccess soa(env);
39 jobject art_method = soa.Env()->GetObjectField(
40 javaMethod, WellKnownClasses::java_lang_reflect_AbstractMethod_artMethod);
41
42 mirror::ArtMethod* m = soa.Decode<mirror::Object*>(art_method)->AsArtMethod();
43 mirror::Class* c = m->GetDeclaringClass();
44 if (UNLIKELY(c->IsAbstract())) {
45 ThrowLocation throw_location = soa.Self()->GetCurrentLocationForThrow();
46 soa.Self()->ThrowNewExceptionF(throw_location, "Ljava/lang/InstantiationException;",
47 "Can't instantiate %s %s",
48 c->IsInterface() ? "interface" : "abstract class",
49 PrettyDescriptor(c).c_str());
50 return NULL;
51 }
52
53 if (!Runtime::Current()->GetClassLinker()->EnsureInitialized(c, true, true)) {
54 DCHECK(soa.Self()->IsExceptionPending());
55 return NULL;
56 }
57
58 mirror::Object* receiver = c->AllocObject(soa.Self());
59 if (receiver == NULL) {
60 return NULL;
61 }
62
63 jobject javaReceiver = soa.AddLocalReference<jobject>(receiver);
64 InvokeMethod(soa, javaMethod, javaReceiver, javaArgs);
65
66 // Constructors are ()V methods, so we shouldn't touch the result of InvokeMethod.
67 return javaReceiver;
68 }
69
70 static JNINativeMethod gMethods[] = {
71 NATIVE_METHOD(Constructor, newInstance, "([Ljava/lang/Object;)Ljava/lang/Object;"),
72 };
73
register_java_lang_reflect_Constructor(JNIEnv * env)74 void register_java_lang_reflect_Constructor(JNIEnv* env) {
75 REGISTER_NATIVE_METHODS("java/lang/reflect/Constructor");
76 }
77
78 } // namespace art
79