56 lines
2.3 KiB
Java
56 lines
2.3 KiB
Java
/*
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* Copyright (c) 2021, 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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*/
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import java.io.File;
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import java.lang.reflect.Method;
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import java.net.URL;
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import java.net.URLClassLoader;
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// This is a handy class for running an application inside a custom class loader. This
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// is used for testing CDS handling of unregistered classes (i.e., archived classes loaded
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// by custom class loaders).
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//
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// See test/hotspot/jtreg/runtime/cds/appcds/loaderConstraints/LoaderConstraintsTest.java
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// for an example.
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public class CustomAppLoader {
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// args[0] = App JAR file
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// args[1] = App main class
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// args[2...] = arguments for the main class
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public static void main(String args[]) throws Throwable {
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File f = new File(args[0]);
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URL[] classLoaderUrls = new URL[] {f.getAbsoluteFile().toURI().toURL()};
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URLClassLoader loader = new URLClassLoader(classLoaderUrls, CustomAppLoader.class.getClassLoader());
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Class k = Class.forName(args[1], true, loader);
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Class parameterTypes[] = new Class[] {String[].class};
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Method mainMethod = k.getDeclaredMethod("main", parameterTypes);
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String appArgs[] = new String[args.length - 2];
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Object invokeArgs[] = new Object[] {appArgs};
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for (int i = 0; i < appArgs.length; i++) {
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appArgs[i] = args[i + 2];
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}
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mainMethod.invoke(null, invokeArgs);
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}
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}
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