/*
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
TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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package org.dynalang.dynalink.beans;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodType;
import junit.framework.TestCase;
import org.dynalang.dynalink.linker.ConversionComparator.Comparison;
import org.dynalang.dynalink.linker.GuardedInvocation;
import org.dynalang.dynalink.linker.LinkRequest;
import org.dynalang.dynalink.linker.LinkerServices;
import org.dynalang.dynalink.support.Lookup;
/**
* Tests for the {@link SimpleDynamicMethod}.
*
* @author Attila Szegedi
*/
public class TestSimpleDynamicMethod extends TestCase {
/**
* Test that it returns null when tried to link with a call site that has less arguments than the method has fixed
* arguments.
*/
public void testLessArgsOnFixArgs() {
assertNull(SingleDynamicMethod.getInvocation(getTest1XMethod(), MethodType.methodType(Void.TYPE,
Object.class, int.class), null));
}
public void testMoreArgsOnFixArgs() {
assertNull(SingleDynamicMethod.getInvocation(getTest1XMethod(), MethodType.methodType(Void.TYPE,
Object.class, int.class, int.class, int.class), null));
}
private static MethodHandle getTest1XMethod() {
return Lookup.PUBLIC.findVirtual(Test1.class, "x", MethodType.methodType(int.class, int.class, int.class));
}
public class Test1 {
public int x(int y, int z) {
return y + z;
}
public int xv(int y, int... z) {
for(int zz: z) {
y += zz;
}
return y;
}
public String sv(String y, String... z) {
for(String zz: z) {
y += zz;
}
return y;
}
}
private abstract static class MockLinkerServices implements LinkerServices {
@Override
public boolean canConvert(Class<?> from, Class<?> to) {
fail(); // Not supposed to be called
return false;
}
@Override
public GuardedInvocation getGuardedInvocation(LinkRequest lreq) throws Exception {
fail(); // Not supposed to be called
return null;
}
@Override
public Comparison compareConversion(Class<?> sourceType, Class<?> targetType1, Class<?> targetType2) {
fail(); // Not supposed to be called
return null;
}
@Override
public MethodHandle getTypeConverter(Class<?> sourceType, Class<?> targetType) {
fail(); // Not supposed to be called
return null;
}
}
public void testExactArgsOnFixArgs() {
final MethodHandle mh = getTest1XMethod();
final MethodType type = MethodType.methodType(int.class, Test1.class, int.class, int.class);
final boolean[] converterInvoked = new boolean[1];
LinkerServices ls = new MockLinkerServices() {
@Override
public MethodHandle asType(MethodHandle handle, MethodType fromType) {
assertSame(handle, mh);
assertEquals(type, fromType);
converterInvoked[0] = true;
return handle;
}
};
// Make sure it didn't interfere - just returned the same method handle
assertSame(mh, SingleDynamicMethod.getInvocation(mh, type, ls));
assertTrue(converterInvoked[0]);
}
public void testVarArgsWithoutConversion() {
final MethodHandle mh = getTest1XvMethod();
final MethodType type = MethodType.methodType(int.class, Test1.class, int.class, int[].class);
final boolean[] converterInvoked = new boolean[1];
LinkerServices ls = new MockLinkerServices() {
@Override
public MethodHandle asType(MethodHandle handle, MethodType fromType) {
assertEqualHandle(handle, mh);
assertEquals(type, fromType);
converterInvoked[0] = true;
return handle;
}
};
// Make sure it didn't interfere - just returned the same method handle
assertEqualHandle(mh, SingleDynamicMethod.getInvocation(mh, type, ls));
assertTrue(converterInvoked[0]);
}
private static void assertEqualHandle(MethodHandle m1, MethodHandle m2) {
assertEquals(m1.type(), m2.type());
assertEquals(m1.isVarargsCollector(), m2.isVarargsCollector());
}
private static MethodHandle getTest1XvMethod() {
return Lookup.PUBLIC.findVirtual(Test1.class, "xv", MethodType.methodType(int.class, int.class, int[].class));
}
private static MethodHandle getTest1SvMethod() {
return Lookup.PUBLIC.findVirtual(Test1.class, "sv",
MethodType.methodType(String.class, String.class, String[].class));
}
public void testVarArgsWithFixArgsOnly() throws Throwable {
final MethodHandle mh = getTest1XvMethod();
final MethodType callSiteType = MethodType.methodType(int.class, Object.class, int.class);
final boolean[] converterInvoked = new boolean[1];
LinkerServices ls = new MockLinkerServices() {
@Override
public MethodHandle asType(MethodHandle handle, MethodType fromType) {
assertNotSame(handle, mh);
assertEquals(MethodType.methodType(int.class, Test1.class, int.class), handle.type());
assertEquals(callSiteType, fromType);
converterInvoked[0] = true;
return handle;
}
};
MethodHandle newHandle = SingleDynamicMethod.getInvocation(mh, callSiteType, ls);
assertNotSame(newHandle, mh);
assertTrue(converterInvoked[0]);
assertEquals(1, newHandle.invokeWithArguments(new Test1(), 1));
}
public void testVarArgsWithPrimitiveConversion() throws Throwable {
final MethodHandle mh = getTest1XvMethod();
final MethodType callSiteType = MethodType.methodType(int.class, Object.class, int.class, int.class, int.class);
final MethodType declaredType = MethodType.methodType(int.class, Test1.class, int.class, int.class, int.class);
final boolean[] converterInvoked = new boolean[1];
LinkerServices ls = new MockLinkerServices() {
@Override
public MethodHandle asType(MethodHandle handle, MethodType fromType) {
assertNotSame(handle, mh);
assertEquals(declaredType, handle.type());
assertEquals(callSiteType, fromType);
converterInvoked[0] = true;
return handle;
}
};
MethodHandle newHandle = SingleDynamicMethod.getInvocation(mh, callSiteType, ls);
assertNotSame(newHandle, mh);
assertTrue(converterInvoked[0]);
assertEquals(6, newHandle.invokeWithArguments(new Test1(), 1, 2, 3));
}
public void testVarArgsWithSinglePrimitiveArgConversion() throws Throwable {
final MethodHandle mh = getTest1XvMethod();
final MethodType declaredType = MethodType.methodType(int.class, Test1.class, int.class, int.class);
final MethodType callSiteType = MethodType.methodType(int.class, Object.class, int.class, int.class);
final boolean[] converterInvoked = new boolean[1];
LinkerServices ls = new MockLinkerServices() {
@Override
public boolean canConvert(Class<?> from, Class<?> to) {
assertSame(int.class, from);
assertSame(int[].class, to);
return false;
}
@Override
public MethodHandle asType(MethodHandle handle, MethodType fromType) {
assertNotSame(handle, mh);
assertEquals(declaredType, handle.type());
assertEquals(callSiteType, fromType);
converterInvoked[0] = true;
return handle;
}
};
MethodHandle newHandle = SingleDynamicMethod.getInvocation(mh, callSiteType, ls);
assertNotSame(newHandle, mh);
assertTrue(converterInvoked[0]);
assertEquals(3, newHandle.invokeWithArguments(new Test1(), 1, 2));
}
public void testVarArgsWithSingleStringArgConversion() throws Throwable {
final MethodHandle mh = getTest1SvMethod();
final MethodType callSiteType = MethodType.methodType(String.class, Object.class, String.class, String.class);
final boolean[] converterInvoked = new boolean[1];
LinkerServices ls = new MockLinkerServices() {
@Override
public boolean canConvert(Class<?> from, Class<?> to) {
assertSame(String.class, from);
assertSame(String[].class, to);
return false;
}
@Override
public MethodHandle asType(MethodHandle handle, MethodType fromType) {
assertNotSame(handle, mh);
assertEquals(MethodType.methodType(String.class, Test1.class, String.class, String.class),
handle.type());
assertEquals(callSiteType, fromType);
converterInvoked[0] = true;
return handle;
}
};
MethodHandle newHandle = SingleDynamicMethod.getInvocation(mh, callSiteType, ls);
assertNotSame(newHandle, mh);
assertTrue(converterInvoked[0]);
assertEquals("ab", newHandle.invokeWithArguments(new Test1(), "a", "b"));
}
public void testVarArgsWithStringConversion() throws Throwable {
final MethodHandle mh = getTest1SvMethod();
final MethodType callSiteType =
MethodType.methodType(String.class, Object.class, String.class, String.class, String.class);
final boolean[] converterInvoked = new boolean[1];
LinkerServices ls = new MockLinkerServices() {
@Override
public MethodHandle asType(MethodHandle handle, MethodType fromType) {
assertNotSame(handle, mh);
assertEquals(
MethodType.methodType(String.class, Test1.class, String.class, String.class, String.class),
handle.type());
assertEquals(callSiteType, fromType);
converterInvoked[0] = true;
return handle;
}
};
MethodHandle newHandle = SingleDynamicMethod.getInvocation(mh, callSiteType, ls);
assertNotSame(newHandle, mh);
assertTrue(converterInvoked[0]);
assertEquals("abc", newHandle.invokeWithArguments(new Test1(), "a", "b", "c"));
}
public void testVarArgsWithSinglePrimitiveArgRuntimeConversion() throws Throwable {
final MethodHandle mh = getTest1XvMethod();
final MethodType callSiteType = MethodType.methodType(int.class, Object.class, Object.class, Object.class);
final int[] converterInvoked = new int[1];
LinkerServices ls = new MockLinkerServices() {
@Override
public boolean canConvert(Class<?> from, Class<?> to) {
assertSame(Object.class, from);
assertSame(int[].class, to);
return true;
}
@Override
public MethodHandle asType(MethodHandle handle, MethodType fromType) {
assertEquals(callSiteType, fromType);
int c = ++converterInvoked[0];
switch(c) {
case 1: {
assertEqualHandle(handle, mh.asFixedArity());
break;
}
case 2: {
assertNotSame(handle, mh);
assertEquals(MethodType.methodType(int.class, Test1.class, int.class, int.class), handle.type());
break;
}
default: {
fail();
break;
}
}
return handle.asType(fromType);
}
};
MethodHandle newHandle = SingleDynamicMethod.getInvocation(mh, callSiteType, ls);
assertNotSame(newHandle, mh);
assertEquals(2, converterInvoked[0]);
assertEquals(3, newHandle.invokeWithArguments(new Test1(), 1, 2));
assertEquals(6, newHandle.invokeWithArguments(new Test1(), 1, new int[] { 2, 3 }));
}
public void testVarArgsWithSingleStringArgRuntimeConversion() throws Throwable {
final MethodHandle mh = getTest1SvMethod();
final MethodType callSiteType = MethodType.methodType(String.class, Object.class, Object.class, Object.class);
final int[] converterInvoked = new int[1];
LinkerServices ls = new MockLinkerServices() {
@Override
public boolean canConvert(Class<?> from, Class<?> to) {
assertSame(Object.class, from);
assertSame(String[].class, to);
return true;
}
@Override
public MethodHandle asType(MethodHandle handle, MethodType fromType) {
assertEquals(callSiteType, fromType);
int c = ++converterInvoked[0];
switch(c) {
case 1: {
assertEqualHandle(handle, mh.asFixedArity());
break;
}
case 2: {
assertNotSame(handle, mh);
assertEquals(MethodType.methodType(String.class, Test1.class, String.class, String.class),
handle.type());
break;
}
default: {
fail();
break;
}
}
return handle.asType(fromType);
}
};
MethodHandle newHandle = SingleDynamicMethod.getInvocation(mh, callSiteType, ls);
assertNotSame(newHandle, mh);
assertEquals(2, converterInvoked[0]);
assertEquals("ab", newHandle.invokeWithArguments(new Test1(), "a", "b"));
assertEquals("abc", newHandle.invokeWithArguments(new Test1(), "a", new String[] { "b", "c" }));
}
}