1 /*
2 * Copyright (C) 2017 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 #ifndef ART_TEST_TI_AGENT_JNI_HELPER_H_
18 #define ART_TEST_TI_AGENT_JNI_HELPER_H_
19
20 #include "jni.h"
21 #include "scoped_local_ref.h"
22
23 namespace art {
24
25 // Create an object array using a lambda that returns a local ref for each element.
26 template <typename T>
CreateObjectArray(JNIEnv * env,jint length,const char * component_type_descriptor,T src)27 static inline jobjectArray CreateObjectArray(JNIEnv* env,
28 jint length,
29 const char* component_type_descriptor,
30 T src) {
31 if (length < 0) {
32 return nullptr;
33 }
34
35 ScopedLocalRef<jclass> obj_class(env, env->FindClass(component_type_descriptor));
36 if (obj_class.get() == nullptr) {
37 return nullptr;
38 }
39
40 ScopedLocalRef<jobjectArray> ret(env, env->NewObjectArray(length, obj_class.get(), nullptr));
41 if (ret.get() == nullptr) {
42 return nullptr;
43 }
44
45 for (jint i = 0; i < length; ++i) {
46 jobject element = src(i);
47 env->SetObjectArrayElement(ret.get(), static_cast<jint>(i), element);
48 env->DeleteLocalRef(element);
49 if (env->ExceptionCheck()) {
50 return nullptr;
51 }
52 }
53
54 return ret.release();
55 }
56
JniThrowNullPointerException(JNIEnv * env,const char * msg)57 inline bool JniThrowNullPointerException(JNIEnv* env, const char* msg) {
58 if (env->ExceptionCheck()) {
59 env->ExceptionClear();
60 }
61
62 ScopedLocalRef<jclass> exc_class(env, env->FindClass("java/lang/NullPointerException"));
63 if (exc_class.get() == nullptr) {
64 return -1;
65 }
66
67 return env->ThrowNew(exc_class.get(), msg) == JNI_OK;
68 }
69
70 } // namespace art
71
72 #endif // ART_TEST_TI_AGENT_JNI_HELPER_H_
73