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
23namespace art {
24
25// Create an object array using a lambda that returns a local ref for each element.
26template <typename T>
27static 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
57inline 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