/*
Copyright 2009-2013 Attila Szegedi
Licensed under both the Apache License, Version 2.0 (the "Apache License")
and the BSD License (the "BSD License"), with licensee being free to
choose either of the two at their discretion.
You may not use this file except in compliance with either the Apache
License or the BSD License.
If you choose to use this file in compliance with the Apache License, the
following notice applies to you:
You may obtain a copy of the Apache 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.
If you choose to use this file in compliance with the BSD License, the
following notice applies to you:
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
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* Neither the name of the copyright holder nor the names of
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IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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package org.dynalang.dynalink.beans;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodType;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import junit.framework.TestCase;
import org.dynalang.dynalink.DynamicLinker;
import org.dynalang.dynalink.DynamicLinkerFactory;
import org.dynalang.dynalink.LinkerServicesFactory;
import org.dynalang.dynalink.MonomorphicCallSite;
import org.dynalang.dynalink.linker.GuardedInvocation;
import org.dynalang.dynalink.linker.GuardingTypeConverterFactory;
import org.dynalang.dynalink.linker.LinkerServices;
import org.dynalang.dynalink.linker.TypeBasedGuardingDynamicLinker;
import org.dynalang.dynalink.support.CallSiteDescriptorFactory;
import org.dynalang.dynalink.support.Guards;
import org.dynalang.dynalink.support.LinkRequestImpl;
import org.dynalang.dynalink.support.LinkerServicesImpl;
import org.dynalang.dynalink.support.Lookup;
import org.dynalang.dynalink.support.TypeConverterFactory;
/**
*
* @author Attila Szegedi
*/
public class TestOverloadedDynamicMethod extends TestCase {
private BeanLinker linker;
private LinkerServices linkerServices;
@Override
protected void setUp() throws Exception {
super.setUp();
linker = new BeanLinker(Test1.class);
linkerServices = LinkerServicesFactory.getLinkerServices(linker);
}
public void testNoneMatchSignature() {
final DynamicMethod dm = linker.getDynamicMethod("add");
assertTrue(dm instanceof OverloadedDynamicMethod);
// No zero-arg adds
assertNull(getInvocation(dm, MethodType.methodType(int.class, Object.class), null));
// No single-arg String add
MethodHandle inv =
getInvocation(dm, MethodType.methodType(String.class, Object.class, String.class), linkerServices);
assertNull(String.valueOf(inv), inv);
}
public static MethodHandle getInvocation(DynamicMethod dm, MethodType methodType, LinkerServices linkerServices) {
return dm.getInvocation(CallSiteDescriptorFactory.create(MethodHandles.publicLookup(), "", methodType), linkerServices);
}
public void testExactMatchSignature() throws Throwable {
final DynamicMethod dm = linker.getDynamicMethod("add");
// Two-arg String add should make a match
final MethodHandle mh = getInvocation(dm, MethodType.methodType(String.class, Object.class, String.class,
String.class), linkerServices);
assertNotNull(mh);
// Must be able to invoke it with two strings
assertEquals("x", mh.invokeWithArguments(new Test1(), "a", "b"));
// Must not be able to invoke it with two ints
try {
mh.invokeWithArguments(new Test1(), 1, 2);
} catch(ClassCastException e) {
// This is expected
}
}
public void testVeryGenericSignature() throws Throwable {
final DynamicMethod dm = linker.getDynamicMethod("add");
// Two-arg String add should make a match
final MethodHandle mh = getInvocation(dm, MethodType.methodType(Object.class, Object.class, Object.class,
Object.class), linkerServices);
assertNotNull(mh);
// Must be able to invoke it with two Strings
assertEquals("x", mh.invokeWithArguments(new Test1(), "a", "b"));
// Must be able to invoke it with two ints
assertEquals(1, mh.invokeWithArguments(new Test1(), 1, 2));
// Must be able to invoke it with explicitly packed varargs
assertEquals(4, mh.invokeWithArguments(new Test1(), 1, new int[] { 2 }));
}
public void testStringFormat() throws Throwable {
DynamicLinker linker = new DynamicLinkerFactory().createLinker();
MonomorphicCallSite callSite = new MonomorphicCallSite(CallSiteDescriptorFactory.create(
MethodHandles.publicLookup(), "dyn:callMethod:format", MethodType.methodType(Object.class,
Object.class, Object.class, Object.class, Object.class)));
linker.link(callSite);
System.out.println(callSite.dynamicInvoker().invokeWithArguments(StaticClass.forClass(String.class),
"%4.0f %4.0f", 12f, 1f));
}
public void testIntOrDouble() throws Throwable {
final DynamicMethod dm = linker.getDynamicMethod("intOrDouble");
final MethodHandle mh = getInvocation(dm, MethodType.methodType(Object.class, Object.class, Object.class),
linkerServices);
assertNotNull(mh);
assertEquals("int", mh.invokeWithArguments(new Test1(), 1));
assertEquals("double", mh.invokeWithArguments(new Test1(), 1.0));
}
public void testStringOrDouble() throws Throwable {
final DynamicMethod dm = linker.getDynamicMethod("stringOrDouble");
final MethodHandle mh = getInvocation(dm, MethodType.methodType(Object.class, Object.class, Object.class),
linkerServices);
assertNotNull(mh);
assertEquals("double", mh.invokeWithArguments(new Test1(), 1));
assertEquals("double", mh.invokeWithArguments(new Test1(), 1.0));
}
public void testVarArg() throws Throwable {
final DynamicMethod dm = linker.getDynamicMethod("boo");
// we want to link to the one-arg invocation
assertBooReturns(1, linkerServices, 1);
// we want to link to the vararg invocation
assertBooReturns(2, linkerServices);
// we want to link to the vararg invocation
assertBooReturns(2, linkerServices, 1, 2);
// If we're linking with a converter that knows how to convert double to int, then we want to make sure we
// don't link to the vararg (Class, int[]) invocation but to the (Class, int) invocation.
final LinkerServices ls = new LinkerServicesImpl(new TypeConverterFactory(Collections.singleton(
new GuardingTypeConverterFactory() {
@Override
public GuardedInvocation convertToType(Class<?> sourceType, Class<?> targetType) {
if(targetType == int.class) {
return new GuardedInvocation(new Lookup(MethodHandles.publicLookup()).findVirtual(
Double.class, "intValue", MethodType.methodType(int.class)).asType(
MethodType.methodType(int.class, sourceType)), Guards.isOfClass(
Double.class, MethodType.methodType(boolean.class, sourceType)));
}
return null;
}
})), linker);
assertBooReturns(1, ls, 1.0);
}
private void assertBooReturns(int retval, LinkerServices ls, Object... args) throws Throwable {
final List<Object> argList = new ArrayList<>();
argList.add(new Test1());
argList.add(String.class);
argList.addAll(Arrays.asList(args));
assertEquals(retval, getInvocation(linker.getDynamicMethod("boo"), MethodType.methodType(Object.class,
Collections.nCopies(args.length + 2, Object.class).toArray(new Class[0])), ls).invokeWithArguments(
argList));
}
public static void main(String[] args) throws Throwable {
TypeBasedGuardingDynamicLinker linker = BeansLinker.getLinkerForClass(Test1.class);
LinkerServices ls = LinkerServicesFactory.getLinkerServices(linker);
Test1 test1 = new Test1();
GuardedInvocation inv = linker.getGuardedInvocation(new LinkRequestImpl(
CallSiteDescriptorFactory.create(MethodHandles.publicLookup(), "dyn:callMethod:add",
MethodType.methodType(Object.class, Object.class, Object.class, Object.class, Object.class, Object.class)),
false, null, null, null, null, null), ls);
MethodHandle handle = inv.getInvocation();
System.out.println(handle.invokeWithArguments(test1, 1, 2, 3, 4));
}
public static class Test1 {
public int add(int i1, int i2) {
return 1;
}
public int add(int i1, int i2, int i3) {
return 2;
}
public String add(String i1, String i2) {
return "x";
}
public int add(int i1, int... in) {
return 4;
}
// The "boo" methods are meant to represent the situation with java.lang.reflect.Array.newInstance() which is
// quite interesting.
public int boo(Class<?> a, int b) {
return 1;
}
public int boo(Class<?> a, int... b) {
return 2;
}
public String intOrDouble(int i) {
return "int";
}
public String intOrDouble(double d) {
return "double";
}
public String stringOrDouble(String s) {
return "String";
}
public String stringOrDouble(double d) {
return "double";
}
}
}