1 /*
2  * Copyright (C) 2011 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_RUNTIME_FIELD_HELPER_H_
18 #define ART_RUNTIME_FIELD_HELPER_H_
19 
20 #include "base/macros.h"
21 #include "handle.h"
22 #include "mirror/art_field.h"
23 
24 namespace art {
25 
26 class FieldHelper {
27  public:
FieldHelper(Handle<mirror::ArtField> f)28   explicit FieldHelper(Handle<mirror::ArtField> f) : field_(f) {}
29 
ChangeField(mirror::ArtField * new_f)30   void ChangeField(mirror::ArtField* new_f) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
31     DCHECK(new_f != nullptr);
32     field_.Assign(new_f);
33   }
34 
GetField()35   mirror::ArtField* GetField() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
36     return field_.Get();
37   }
38 
39   mirror::Class* GetType(bool resolve = true) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
40 
41   // The returned const char* is only guaranteed to be valid for the lifetime of the FieldHelper.
42   // If you need it longer, copy it into a std::string.
43   const char* GetDeclaringClassDescriptor() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
44 
45  private:
46   Handle<mirror::ArtField> field_;
47   std::string declaring_class_descriptor_;
48 
49   DISALLOW_COPY_AND_ASSIGN(FieldHelper);
50 };
51 
52 }  // namespace art
53 
54 #endif  // ART_RUNTIME_FIELD_HELPER_H_
55