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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 java.lang.invoke.MethodHandles
* @library /lib/testlibrary /java/lang/invoke/common
* @compile MethodHandlesTest.java MethodHandlesInsertArgumentsTest.java remote/RemoteExample.java
* @run junit/othervm/timeout=2500 -XX:+IgnoreUnrecognizedVMOptions
* -XX:-VerifyDependencies
* -esa
* test.java.lang.invoke.MethodHandlesInsertArgumentsTest
*/
package test.java.lang.invoke;
import org.junit.*;
import test.java.lang.invoke.lib.CodeCacheOverflowProcessor;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import static java.lang.invoke.MethodType.methodType;
import static org.junit.Assert.*;
public class MethodHandlesInsertArgumentsTest extends MethodHandlesTest {
@Test // SLOW
public void testInsertArguments() throws Throwable {
CodeCacheOverflowProcessor.runMHTest(this::testInsertArguments0);
}
public void testInsertArguments0() throws Throwable {
if (CAN_SKIP_WORKING) return;
startTest("insertArguments");
for (int nargs = 0; nargs < 50; nargs++) {
if (CAN_TEST_LIGHTLY && nargs > 11) break;
for (int ins = 0; ins <= nargs; ins++) {
if (nargs > 10 && ins > 4 && ins < nargs-4 && ins % 10 != 3)
continue;
for (int pos = 0; pos <= nargs; pos++) {
if (nargs > 10 && pos > 4 && pos < nargs-4 && pos % 10 != 3)
continue;
if (CAN_TEST_LIGHTLY && pos > 2 && pos < nargs-2) continue;
testInsertArguments(nargs, pos, ins);
}
}
}
}
void testInsertArguments(int nargs, int pos, int ins) throws Throwable {
countTest();
MethodHandle target = varargsArray(nargs + ins);
Object[] args = randomArgs(target.type().parameterArray());
List<Object> resList = Arrays.asList(args);
List<Object> argsToPass = new ArrayList<>(resList);
List<Object> argsToInsert = argsToPass.subList(pos, pos + ins);
if (verbosity >= 3)
System.out.println("insert: "+argsToInsert+" @"+pos+" into "+target);
@SuppressWarnings("cast") // cast to spread Object... is helpful
MethodHandle target2 = MethodHandles.insertArguments(target, pos,
(Object[]/*...*/) argsToInsert.toArray());
argsToInsert.clear(); // remove from argsToInsert
Object res2 = target2.invokeWithArguments(argsToPass);
Object res2List = Arrays.asList((Object[])res2);
if (verbosity >= 3)
System.out.println("result: "+res2List);
assertEquals(resList, res2List);
}
private static MethodHandle methodHandle = null;
static {
try {
methodHandle = MethodHandles.lookup().findVirtual(
MethodHandlesInsertArgumentsTest.class,
"testMethod",
methodType(void.class, String.class, String.class));
} catch(ReflectiveOperationException ex) {
throw new InternalError(ex);
}
}
@Test(expected = IllegalArgumentException.class)
public void testInsertArgumentsInvalidPos() {
countTest();
MethodHandles.insertArguments(methodHandle, -1, "First", "Second");
}
@Test(expected = IllegalArgumentException.class)
public void testInsertArgumentsTooManyParams() {
countTest();
MethodHandles.insertArguments(methodHandle, 1, "First", "Second", "Third");
}
@Test(expected = ClassCastException.class)
public void testInsertArgumentsPosZero() {
countTest();
MethodHandles.insertArguments(methodHandle, 0, "First");
}
@Test(expected = ClassCastException.class)
public void testInsertArgumentsIncorrectParam() {
countTest();
MethodHandles.insertArguments(methodHandle, 1, "First", new Object());
}
void testMethod(String a, String b) {
}
}
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