java_lang_reflect_Array.cc revision cb6b0f31ede2275e79e6199ec391147585a37a2a 
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-inl.h"
18#include "common_throws.h"
19#include "dex_file-inl.h"
20#include "jni_internal.h"
21#include "mirror/class-inl.h"
22#include "mirror/object-inl.h"
23#include "scoped_fast_native_object_access.h"
24#include "handle_scope-inl.h"
25
26namespace art {
27
28static jobject Array_createMultiArray(JNIEnv* env, jclass, jclass javaElementClass, jobject javaDimArray) {
29  ScopedFastNativeObjectAccess soa(env);
30  DCHECK(javaElementClass != NULL);
31  StackHandleScope<2> hs(soa.Self());
32  Handle<mirror::Class> element_class(hs.NewHandle(soa.Decode<mirror::Class*>(javaElementClass)));
33  DCHECK(element_class->IsClass());
34  DCHECK(javaDimArray != NULL);
35  mirror::Object* dimensions_obj = soa.Decode<mirror::Object*>(javaDimArray);
36  DCHECK(dimensions_obj->IsArrayInstance());
37  DCHECK_EQ(dimensions_obj->GetClass()->GetComponentType()->GetPrimitiveType(),
38            Primitive::kPrimInt);
39  Handle<mirror::IntArray> dimensions_array(
40      hs.NewHandle(down_cast<mirror::IntArray*>(dimensions_obj)));
41  mirror::Array* new_array = mirror::Array::CreateMultiArray(soa.Self(), element_class,
42                                                             dimensions_array);
43  return soa.AddLocalReference<jobject>(new_array);
44}
45
46static jobject Array_createObjectArray(JNIEnv* env, jclass, jclass javaElementClass, jint length) {
47  ScopedFastNativeObjectAccess soa(env);
48  DCHECK(javaElementClass != NULL);
49  if (UNLIKELY(length < 0)) {
50    ThrowNegativeArraySizeException(length);
51    return NULL;
52  }
53  mirror::Class* element_class = soa.Decode<mirror::Class*>(javaElementClass);
54  Runtime* runtime = Runtime::Current();
55  ClassLinker* class_linker = runtime->GetClassLinker();
56  mirror::Class* array_class = class_linker->FindArrayClass(soa.Self(), &element_class);
57  if (UNLIKELY(array_class == NULL)) {
58    CHECK(soa.Self()->IsExceptionPending());
59    return NULL;
60  }
61  DCHECK(array_class->IsObjectArrayClass());
62  mirror::Array* new_array = mirror::Array::Alloc<true>(soa.Self(), array_class, length,
63                                                        sizeof(mirror::HeapReference<mirror::Object>),
64                                                        runtime->GetHeap()->GetCurrentAllocator());
65  return soa.AddLocalReference<jobject>(new_array);
66}
67
68static JNINativeMethod gMethods[] = {
69  NATIVE_METHOD(Array, createMultiArray, "!(Ljava/lang/Class;[I)Ljava/lang/Object;"),
70  NATIVE_METHOD(Array, createObjectArray, "!(Ljava/lang/Class;I)Ljava/lang/Object;"),
71};
72
73void register_java_lang_reflect_Array(JNIEnv* env) {
74  REGISTER_NATIVE_METHODS("java/lang/reflect/Array");
75}
76
77}  // namespace art
78