Mercurial > hg > truffle
diff test/compiler/types/correctness/execution/MethodHandleDelegate.java @ 18041:52b4284cb496
Merge with jdk8u20-b26
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Wed, 15 Oct 2014 16:02:50 +0200 |
parents | 534fbe3d90f0 |
children |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/test/compiler/types/correctness/execution/MethodHandleDelegate.java Wed Oct 15 16:02:50 2014 +0200 @@ -0,0 +1,105 @@ +/* + * Copyright (c) 2014, 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. + */ + +package execution; + +import hierarchies.TypeHierarchy; +import scenarios.Scenario; + +import java.lang.invoke.MethodHandle; +import java.lang.invoke.MethodHandles; +import java.lang.invoke.MethodType; + +/** + * Executes test scenario using {@link MethodHandle#invoke(Object...)}. + * Delegates execution to the given {@link Execution} by creating + * new test scenario, see {@link Scenario} + */ +public class MethodHandleDelegate<T extends TypeHierarchy.I, R> implements Execution<T, R> { + private final Execution<T, R> delegate; + + public MethodHandleDelegate(Execution<T, R> delegate) { + this.delegate = delegate; + } + + @Override + public void execute(Scenario<T, R> scenario) { + delegate.execute(new MHScenario<T, R>(scenario)); + } + + @Override + public String getName() { + return "MethodHandleDelegate # " + delegate.getName(); + } + + private static class MHScenario<T extends TypeHierarchy.I, R> extends Scenario<T, R> { + private final Scenario<T, R> scenario; + private static final MethodHandle METHOD_HANDLE_RUN; + + static { + MethodHandles.Lookup lookup = MethodHandles.lookup(); + MethodType methodType = MethodType.methodType(Object.class, TypeHierarchy.I.class); + + try { + METHOD_HANDLE_RUN = lookup.findVirtual(Scenario.class, "run", methodType); + } catch (NoSuchMethodException | IllegalAccessException e) { + System.err.println("Failed to get target method run() with " + e); + e.printStackTrace(); + throw new RuntimeException(e); + } + } + + /** + * Constructor + * + * @param scenario test scenario to be executed + */ + private MHScenario(Scenario<T, R> scenario) { + super("MethodHandle::" + scenario.getName(), scenario.profilingType, scenario.hierarchy); + this.scenario = scenario; + } + + /** + * Runs {@link Scenario#run(T)} with {@link MethodHandle#invoke(Object...)} + * + * @param t subject of the test + * @return result of the underlying {@link Scenario#run(T)} invocation + */ + @SuppressWarnings("unchecked") + @Override + public R run(T t) { + try { + return (R) METHOD_HANDLE_RUN.invoke(scenario, t); + } catch (Throwable thr) { + System.err.println(scenario.getName() + + " failed to invoke target method run() with " + thr); + throw new RuntimeException("Invocation failed", thr); + } + } + + @Override + public void check(R r, T t) { + scenario.check(r, t); + } + } +}