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+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ART_RUNTIME_REFLECTIVE_REFERENCE_H_
+#define ART_RUNTIME_REFLECTIVE_REFERENCE_H_
+
+#include "android-base/macros.h"
+#include "base/macros.h"
+#include "mirror/object_reference.h"
+
+namespace art {
+
+class ArtField;
+class ArtMethod;
+// A reference to a ArtField or ArtMethod.
+template <class ReflectiveType>
+class ReflectiveReference {
+ public:
+ static_assert(std::is_same_v<ReflectiveType, ArtMethod> ||
+ std::is_same_v<ReflectiveType, ArtField>,
+ "Uknown type!");
+ ReflectiveReference() : val_(nullptr) {}
+ explicit ReflectiveReference(ReflectiveType* r) : val_(r) {}
+ ReflectiveReference<ReflectiveType>& operator=(const ReflectiveReference<ReflectiveType>& t) =
+ default;
+
+ ReflectiveType* Ptr() {
+ return val_;
+ }
+
+ void Assign(ReflectiveType* r) {
+ val_ = r;
+ }
+
+ bool IsNull() const {
+ return val_ == nullptr;
+ }
+
+ bool operator==(const ReflectiveReference<ReflectiveType>& rr) const {
+ return val_ == rr.val_;
+ }
+ bool operator!=(const ReflectiveReference<ReflectiveType>& rr) const {
+ return !operator==(rr);
+ }
+ bool operator==(std::nullptr_t) const {
+ return IsNull();
+ }
+ bool operator!=(std::nullptr_t) const {
+ return !IsNull();
+ }
+
+ private:
+ ReflectiveType* val_;
+};
+
+} // namespace art
+
+#endif // ART_RUNTIME_REFLECTIVE_REFERENCE_H_