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/*
* Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
**/
/* @test
* @summary unit tests for arity limits of methods in java.lang.invoke.MethodHandles
* @run junit/othervm test.java.lang.invoke.MethodHandlesArityLimitsTest
**/
package test.java.lang.invoke;
import org.junit.*;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.WrongMethodTypeException;
import java.lang.invoke.MethodType;
import java.lang.invoke.VarHandle;
import java.util.List;
import java.util.stream.IntStream;
import static org.junit.Assert.*;
public class MethodHandlesArityLimitsTest {
private static MethodType mt254 = null;
private static MethodType mt255 = null;
static {
Class<?>[] classes254 = IntStream.range(0, 254)
.mapToObj(i -> int.class)
.toArray(Class[]::new);
mt254 = MethodType.methodType(void.class, classes254);
mt255 = mt254.appendParameterTypes(int.class);
}
@Test(expected = IllegalArgumentException.class)
public void testDropArgumentsToMatch() {
MethodHandles.dropArgumentsToMatch(MethodHandles.empty(mt254), 0, mt255.parameterList(), 0);
}
@Test(expected = IllegalArgumentException.class)
public void testEmpty() {
MethodHandles.empty(mt255);
}
@Test(expected = IllegalArgumentException.class)
public void testExplicitCastArguments() {
MethodHandles.explicitCastArguments(
MethodHandles.empty(mt254),
mt254.dropParameterTypes(0, 1).insertParameterTypes(0, long.class) );
}
@Test(expected = IllegalArgumentException.class)
public void testPermuteArguments() {
MethodHandles.permuteArguments(
MethodHandles.empty(MethodType.methodType(void.class)),
mt255);
}
@Test(expected = IllegalArgumentException.class)
public void testVarHandleInvoker() {
MethodHandles.varHandleInvoker(VarHandle.AccessMode.GET, mt254);
}
@Test(expected = IllegalArgumentException.class)
public void testVarHandleExactInvoker() {
MethodHandles.varHandleExactInvoker(VarHandle.AccessMode.GET, mt254);
}
@Test(expected = IllegalArgumentException.class)
public void testMHExactInvoker() {
MethodHandles.exactInvoker(mt255);
}
@Test(expected = IllegalArgumentException.class)
public void testMHInvoker() {
MethodHandles.invoker(mt255);
}
@Test(expected = IllegalArgumentException.class)
public void testMHSpreadInvoker() {
MethodHandles.spreadInvoker(mt255, 255);
}
@Test(expected = WrongMethodTypeException.class)
public void testAsType() throws ReflectiveOperationException {
MethodHandle asList = MethodHandles.lookup().findStatic(
java.util.Arrays.class,
"asList",
MethodType.methodType(List.class, Object[].class));
try {
asList.asType(MethodType.genericMethodType(254));//does not throw IAE or WMTE
}
catch(WrongMethodTypeException wmte) {
throw new AssertionError("Unexpected WrongMethodTypeException thrown", wmte);
}
asList.asType(MethodType.genericMethodType(255));//throws WMTE
}
}
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