76 lines
2.8 KiB
Java
76 lines
2.8 KiB
Java
/*
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* Copyright (c) 2018, 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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import java.io.*;
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import jdk.test.lib.compiler.InMemoryJavaCompiler;
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public class MyDiffClassLoader extends ClassLoader {
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public String loaderName;
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public static boolean switchClassData = false;
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MyDiffClassLoader(String name) {
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this.loaderName = name;
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}
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public Class loadClass(String name) throws ClassNotFoundException {
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if (!name.contains("c1r") &&
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!name.contains("c1c") &&
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!name.contains("c1s") &&
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!name.equals("p2.c2")) {
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return super.loadClass(name);
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}
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// new loader loads p2.c2
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if (name.equals("p2.c2") && !loaderName.equals("C2Loader")) {
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Class<?> c = new MyDiffClassLoader("C2Loader").loadClass(name);
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switchClassData = true;
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return c;
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}
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byte[] data = switchClassData ? getNewClassData(name) : getClassData(name);
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System.out.println("name is " + name);
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return defineClass(name, data, 0, data.length);
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}
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byte[] getClassData(String name) {
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try {
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String TempName = name.replaceAll("\\.", "/");
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String currentDir = System.getProperty("test.classes");
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String filename = currentDir + File.separator + TempName + ".class";
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FileInputStream fis = new FileInputStream(filename);
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byte[] b = new byte[5000];
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int cnt = fis.read(b, 0, 5000);
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byte[] c = new byte[cnt];
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for (int i=0; i<cnt; i++) c[i] = b[i];
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return c;
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} catch (IOException e) {
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return null;
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}
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}
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// Return p2.c2 with everything removed
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byte[] getNewClassData(String name) {
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return InMemoryJavaCompiler.compile("p2.c2", "package p2; public class c2 { }");
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}
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}
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