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/*
* Copyright (C) 2018 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 annotations.BootstrapMethod;
import annotations.CalledByIndy;
import java.lang.invoke.CallSite;
import java.lang.invoke.ConstantCallSite;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodType;
class TestInvocationKinds extends TestBase {
private static int static_field;
private double instance_field;
static CallSite lookupStaticFieldGetter(
MethodHandles.Lookup lookup, String name, MethodType methodType) throws Throwable {
// methodType = "()LfieldType;"
MethodHandle mh =
lookup.findStaticGetter(TestInvocationKinds.class, name, methodType.returnType());
return new ConstantCallSite(mh);
}
@CalledByIndy(
bootstrapMethod =
@BootstrapMethod(
enclosingType = TestInvocationKinds.class,
name = "lookupStaticFieldSetter"
),
fieldOrMethodName = "static_field",
returnType = void.class,
parameterTypes = {int.class}
)
private static void setStaticField(int value) {
assertNotReached();
}
static CallSite lookupStaticFieldSetter(
MethodHandles.Lookup lookup, String name, MethodType methodType) throws Throwable {
// methodType = "(LfieldType;)V"
MethodHandle mh =
lookup.findStaticSetter(
TestInvocationKinds.class, name, methodType.parameterType(0));
return new ConstantCallSite(mh);
}
@CalledByIndy(
bootstrapMethod =
@BootstrapMethod(
enclosingType = TestInvocationKinds.class,
name = "lookupStaticFieldGetter"
),
fieldOrMethodName = "static_field",
returnType = int.class,
parameterTypes = {}
)
private static int getStaticField() {
assertNotReached();
return 0;
}
static CallSite lookupInstanceFieldSetter(
MethodHandles.Lookup lookup, String name, MethodType methodType) throws Throwable {
// methodType = "(Lreceiver;LfieldType;)V"
MethodHandle mh =
lookup.findSetter(methodType.parameterType(0), name, methodType.parameterType(1));
return new ConstantCallSite(mh);
}
@CalledByIndy(
bootstrapMethod =
@BootstrapMethod(
enclosingType = TestInvocationKinds.class,
name = "lookupInstanceFieldSetter"
),
fieldOrMethodName = "instance_field",
returnType = void.class,
parameterTypes = {TestInvocationKinds.class, double.class}
)
private static void setInstanceField(TestInvocationKinds instance, double value) {
assertNotReached();
instance.instance_field = Double.NaN;
}
static CallSite lookupInstanceFieldGetter(
MethodHandles.Lookup lookup, String name, MethodType methodType) throws Throwable {
// methodType = "(Lreceiver;)LfieldType;"
MethodHandle mh =
lookup.findGetter(methodType.parameterType(0), name, methodType.returnType());
return new ConstantCallSite(mh);
}
@CalledByIndy(
bootstrapMethod =
@BootstrapMethod(
enclosingType = TestInvocationKinds.class,
name = "lookupInstanceFieldGetter"
),
fieldOrMethodName = "instance_field",
returnType = double.class,
parameterTypes = {TestInvocationKinds.class}
)
private static double getInstanceField(TestInvocationKinds instance) {
assertNotReached();
return Double.NaN;
}
private static void testStaticFieldAccessors() {
System.out.println("testStaticFieldAccessors");
setStaticField(3);
assertEquals(static_field, 3);
setStaticField(4);
assertEquals(static_field, 4);
assertEquals(static_field, getStaticField());
static_field = Integer.MAX_VALUE;
assertEquals(Integer.MAX_VALUE, getStaticField());
}
private static void testInstanceFieldAccessors() {
System.out.println("testInstanceFieldAccessors");
TestInvocationKinds instance = new TestInvocationKinds();
instance.instance_field = Double.MIN_VALUE;
setInstanceField(instance, Math.PI);
assertEquals(Math.PI, instance.instance_field);
instance.instance_field = Math.E;
assertEquals(Math.E, getInstanceField(instance));
}
private static CallSite lookupVirtual(
MethodHandles.Lookup lookup, String name, MethodType methodType) throws Throwable {
// To get the point-of-use and invokedynamic to work the methodType here has the
// receiver type as the leading paramter which needs to be dropped for findVirtual().
MethodType mt = methodType.dropParameterTypes(0, 1);
MethodHandle mh = lookup.findVirtual(TestInvocationKinds.class, name, mt);
return new ConstantCallSite(mh);
}
@CalledByIndy(
bootstrapMethod =
@BootstrapMethod(enclosingType = TestInvocationKinds.class, name = "lookupVirtual"),
fieldOrMethodName = "getMaxIntegerValue",
returnType = int.class,
parameterTypes = {TestInvocationKinds.class, int.class, int.class}
)
private static int maxIntegerValue(TestInvocationKinds receiver, int x, int y) {
assertNotReached();
return 0;
}
public int getMaxIntegerValue(int x, int y) {
return x > y ? x : y;
}
static void testInvokeVirtual() {
System.out.print("testInvokeVirtual => max(77, -3) = ");
TestInvocationKinds receiver = new TestInvocationKinds();
int result = maxIntegerValue(receiver, 77, -3);
System.out.println(result);
}
static class Widget {
int value;
public Widget(int value) {}
}
private static CallSite lookupConstructor(
MethodHandles.Lookup lookup, String name, MethodType methodType) throws Throwable {
// methodType = (constructorParams);classToBeConstructed
Class<?> cls = methodType.returnType();
MethodType constructorMethodType = methodType.changeReturnType(void.class);
MethodHandle mh = lookup.findConstructor(cls, constructorMethodType);
return new ConstantCallSite(mh);
}
@CalledByIndy(
bootstrapMethod =
@BootstrapMethod(
enclosingType = TestInvocationKinds.class,
name = "lookupConstructor"
),
fieldOrMethodName = "unused",
returnType = Widget.class,
parameterTypes = {int.class}
)
private static Widget makeWidget(int v) {
assertNotReached();
return null;
}
static void testConstructor() {
System.out.print("testConstructor => ");
Widget receiver = makeWidget(3);
assertEquals(Widget.class, receiver.getClass());
System.out.println(receiver.getClass());
}
public static void test() {
System.out.println(TestInvocationKinds.class.getName());
testStaticFieldAccessors();
testInstanceFieldAccessors();
testInvokeVirtual();
testConstructor();
}
}
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