| /* |
| * Copyright (c) 2017, 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 Smoke-test class specializer, used to create BoundMethodHandle classes |
| * @compile/module=java.base java/lang/invoke/ClassSpecializerHelper.java |
| * @run testng/othervm/timeout=250 -ea -esa ClassSpecializerTest |
| */ |
| |
| // Useful diagnostics to try: |
| // -Djava.lang.invoke.MethodHandle.TRACE_RESOLVE=true |
| // -Djava.lang.invoke.MethodHandle.DUMP_CLASS_FILES=true |
| |
| |
| import org.testng.annotations.*; |
| import java.lang.invoke.*; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.List; |
| |
| import static java.lang.invoke.ClassSpecializerHelper.*; |
| |
| |
| public class ClassSpecializerTest { |
| @Test |
| public void testFindSpecies() throws Throwable { |
| System.out.println("testFindSpecies"); |
| System.out.println("test = " + SPEC_TEST); |
| ArrayList<Object> args = new ArrayList<>(); |
| for (int key = 0; key <= Kind.MAX_KEY; key++) { |
| Kind k = SpecTest.kind(key); |
| System.out.println("k = " + k); |
| MethodHandle mh = k.factory(); |
| System.out.println("k.f = " + mh); |
| args.clear(); |
| for (Class<?> pt : mh.type().parameterList()) { |
| args.add(coughUpA(pt)); |
| } |
| args.set(0, key * 1000 + 42); |
| Frob f = (Frob) mh.invokeWithArguments(args.toArray()); |
| assert(f.kind() == k); |
| System.out.println("k.f(...) = " + f.toString()); |
| List<Object> l = f.asList(); |
| System.out.println("f.l = " + l); |
| args.subList(0,1).clear(); // drop label |
| assert(args.equals(l)); |
| } |
| } |
| private static Object coughUpA(Class<?> pt) throws Throwable { |
| if (pt == String.class) return "foo"; |
| if (pt.isArray()) return java.lang.reflect.Array.newInstance(pt.getComponentType(), 2); |
| if (pt == Integer.class) return 42; |
| if (pt == Double.class) return 3.14; |
| if (pt.isAssignableFrom(List.class)) |
| return Arrays.asList("hello", "world", "from", pt.getSimpleName()); |
| return MethodHandles.zero(pt).invoke(); |
| } |
| public static void main(String... av) throws Throwable { |
| System.out.println("TEST: ClassSpecializerTest"); |
| new ClassSpecializerTest().testFindSpecies(); |
| } |
| } |