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