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 "java_lang_reflect_Array.h"
18
19#include "class_linker-inl.h"
20#include "common_throws.h"
21#include "dex_file-inl.h"
22#include "jni_internal.h"
23#include "mirror/class-inl.h"
24#include "mirror/object-inl.h"
25#include "scoped_fast_native_object_access-inl.h"
26#include "handle_scope-inl.h"
27
28namespace art {
29
30static jobject Array_createMultiArray(
31    JNIEnv* env, jclass, jclass javaElementClass, jobject javaDimArray) {
32  ScopedFastNativeObjectAccess soa(env);
33  DCHECK(javaElementClass != nullptr);
34  StackHandleScope<2> hs(soa.Self());
35  Handle<mirror::Class> element_class(hs.NewHandle(soa.Decode<mirror::Class>(javaElementClass)));
36  DCHECK(element_class->IsClass());
37  DCHECK(javaDimArray != nullptr);
38  ObjPtr<mirror::Object> dimensions_obj = soa.Decode<mirror::Object>(javaDimArray);
39  DCHECK(dimensions_obj->IsArrayInstance());
40  DCHECK_EQ(dimensions_obj->GetClass()->GetComponentType()->GetPrimitiveType(),
41            Primitive::kPrimInt);
42  Handle<mirror::IntArray> dimensions_array(
43      hs.NewHandle(ObjPtr<mirror::IntArray>::DownCast(dimensions_obj)));
44  mirror::Array* new_array = mirror::Array::CreateMultiArray(soa.Self(),
45                                                             element_class,
46                                                             dimensions_array);
47  return soa.AddLocalReference<jobject>(new_array);
48}
49
50static jobject Array_createObjectArray(JNIEnv* env, jclass, jclass javaElementClass, jint length) {
51  ScopedFastNativeObjectAccess soa(env);
52  DCHECK(javaElementClass != nullptr);
53  if (UNLIKELY(length < 0)) {
54    ThrowNegativeArraySizeException(length);
55    return nullptr;
56  }
57  ObjPtr<mirror::Class> element_class = soa.Decode<mirror::Class>(javaElementClass);
58  Runtime* runtime = Runtime::Current();
59  ClassLinker* class_linker = runtime->GetClassLinker();
60  ObjPtr<mirror::Class> array_class = class_linker->FindArrayClass(soa.Self(), &element_class);
61  if (UNLIKELY(array_class == nullptr)) {
62    CHECK(soa.Self()->IsExceptionPending());
63    return nullptr;
64  }
65  DCHECK(array_class->IsObjectArrayClass());
66  ObjPtr<mirror::Array> new_array = mirror::ObjectArray<mirror::Object*>::Alloc(
67      soa.Self(),
68      array_class,
69      length,
70      runtime->GetHeap()->GetCurrentAllocator());
71  return soa.AddLocalReference<jobject>(new_array);
72}
73
74static JNINativeMethod gMethods[] = {
75  FAST_NATIVE_METHOD(Array, createMultiArray, "(Ljava/lang/Class;[I)Ljava/lang/Object;"),
76  FAST_NATIVE_METHOD(Array, createObjectArray, "(Ljava/lang/Class;I)Ljava/lang/Object;"),
77};
78
79void register_java_lang_reflect_Array(JNIEnv* env) {
80  REGISTER_NATIVE_METHODS("java/lang/reflect/Array");
81}
82
83}  // namespace art
84