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/*
* Copyright (C) 2024 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.
*/
import static java.lang.invoke.MethodType.methodType;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.VarHandle;
public class Main {
public static void main(String[] args) throws Throwable {
testMethodHandleStaticFieldGet();
testMethodHandleStaticFieldPut();
testMethodHandleStaticMethod();
testVarHandleStaticFieldGet();
testVarHandleStaticFieldPut();
}
private static void testMethodHandleStaticFieldGet() throws Throwable {
MethodHandle mh = MethodHandles.lookup()
.findStaticGetter(MHStaticGetter.class, "a", int.class);
int actual = (int) mh.invokeExact();
assertEquals(actual, 10);
assertEquals(MHStaticGetter.b, 12);
}
private static void testMethodHandleStaticFieldPut() throws Throwable {
MethodHandle mh = MethodHandles.lookup()
.findStaticSetter(MHStaticSetter.class, "a", int.class);
mh.invokeExact(100);
assertEquals(MHStaticSetter.a, 100);
assertEquals(MHStaticGetter.b, 12);
}
private static void testMethodHandleStaticMethod() throws Throwable {
MethodHandle mh = MethodHandles.lookup()
.findStatic(MHStaticMethod.class, "getB", methodType(int.class));
int actualB = (int) mh.invokeExact();
assertEquals(actualB, 12);
assertEquals(MHStaticMethod.a, 10);
}
private static void testVarHandleStaticFieldGet() throws Throwable {
VarHandle vh = MethodHandles.lookup()
.findStaticVarHandle(VHStaticGet.class, "a", int.class);
int actual = (int) vh.get();
assertEquals(actual, 10);
assertEquals(VHStaticGet.b, 12);
}
private static void testVarHandleStaticFieldPut() throws Throwable {
VarHandle vh = MethodHandles.lookup()
.findStaticVarHandle(VHStaticGet.class, "a", int.class);
vh.set(100);
assertEquals(VHStaticGet.a, 100);
assertEquals(VHStaticGet.b, 12);
}
private static void assertEquals(int actual, int expected) {
if (actual != expected) {
throw new AssertionError("Expected: " + expected + ", but got: " + actual);
}
}
}
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