76 lines
2.7 KiB
Java
76 lines
2.7 KiB
Java
/*
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* Copyright (c) 2020, 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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public class CustomLoaderApp {
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private static String className = "LambHello";
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// Prevent the class from being GC'ed too soon.
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private static Class keptC = null;
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public static void main(String args[]) throws Exception {
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String path = args[0];
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URL url = new File(path).toURI().toURL();
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URL[] urls = new URL[] {url};
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System.out.println(path);
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System.out.println(url);
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boolean init = false;
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if (args.length >= 2 && args[1].equals("init")) {
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init = true;
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}
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// The dynamicArchive/LambdaCustomLoader.java test passes the keep-alive
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// argument for preventing the class from being GC'ed prior to dumping of
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// the dynamic CDS archive.
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boolean keepAlive = false;
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if (args[args.length - 1].equals("keep-alive")) {
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keepAlive = true;
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}
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URLClassLoader urlClassLoader =
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new URLClassLoader("HelloClassLoader", urls, null);
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Class c = Class.forName(className, init, urlClassLoader);
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if (keepAlive) {
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keptC = c;
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}
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System.out.println(c);
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System.out.println(c.getClassLoader());
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if (c.getClassLoader() != urlClassLoader) {
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throw new RuntimeException("c.getClassLoader() == " + c.getClassLoader() +
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", expected == " + urlClassLoader);
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}
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if (init) {
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Object o = c.newInstance();
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Method method = c.getMethod("main", String[].class);
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String[] params = null;
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method.invoke(null, (Object)params);
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}
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}
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}
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