83 lines
3.2 KiB
Java
83 lines
3.2 KiB
Java
/*
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* Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/* @test
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* @summary Smoke-test class specializer, used to create BoundMethodHandle classes
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* @compile/module=java.base java/lang/invoke/ClassSpecializerHelper.java
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* @run testng/othervm/timeout=250 -ea -esa ClassSpecializerTest
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*/
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// Useful diagnostics to try:
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// -Djava.lang.invoke.MethodHandle.TRACE_RESOLVE=true
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// -Djava.lang.invoke.MethodHandle.DUMP_CLASS_FILES=true
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import org.testng.annotations.*;
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import java.lang.invoke.*;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.List;
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import static java.lang.invoke.ClassSpecializerHelper.*;
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public class ClassSpecializerTest {
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@Test
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public void testFindSpecies() throws Throwable {
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System.out.println("testFindSpecies");
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System.out.println("test = " + SPEC_TEST);
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ArrayList<Object> args = new ArrayList<>();
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for (int key = 0; key <= Kind.MAX_KEY; key++) {
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Kind k = SpecTest.kind(key);
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System.out.println("k = " + k);
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MethodHandle mh = k.factory();
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System.out.println("k.f = " + mh);
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args.clear();
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for (Class<?> pt : mh.type().parameterList()) {
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args.add(coughUpA(pt));
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}
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args.set(0, key * 1000 + 42);
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Frob f = (Frob) mh.invokeWithArguments(args.toArray());
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assert(f.kind() == k);
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System.out.println("k.f(...) = " + f.toString());
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List<Object> l = f.asList();
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System.out.println("f.l = " + l);
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args.subList(0,1).clear(); // drop label
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assert(args.equals(l));
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}
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}
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private static Object coughUpA(Class<?> pt) throws Throwable {
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if (pt == String.class) return "foo";
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if (pt.isArray()) return java.lang.reflect.Array.newInstance(pt.getComponentType(), 2);
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if (pt == Integer.class) return 42;
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if (pt == Double.class) return 3.14;
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if (pt.isAssignableFrom(List.class))
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return Arrays.asList("hello", "world", "from", pt.getSimpleName());
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return MethodHandles.zero(pt).invoke();
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}
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public static void main(String... av) throws Throwable {
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System.out.println("TEST: ClassSpecializerTest");
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new ClassSpecializerTest().testFindSpecies();
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}
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}
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