| /* |
| * 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); |
| } |
| } |
| } |