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/*
* Copyright (c) 2016, 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.
*/
import java.io.DataInputStream;
import java.io.InputStream;
import java.io.IOException;
import java.io.PrintStream;
import java.util.jar.JarFile;
import java.util.zip.ZipEntry;
public class CustomLoader extends ClassLoader {
private static PrintStream out = System.out;
public static ClassLoader myself;
public static ClassLoader agentClassLoader;
public static boolean failed = true;
public CustomLoader(ClassLoader classLoader) {
super(classLoader);
myself = this;
}
@Override
public Class<?> loadClass(String name) throws ClassNotFoundException {
out.println("CustomLoader: loading class: " + name);
if (name.equals("Agent")) {
Class c = null;
try {
byte[] buf = locateBytes();
c = defineClass(name, buf, 0, buf.length);
} catch (IOException ex) {
throw new ClassNotFoundException(ex.getMessage());
}
resolveClass(c);
out.println("CustomLoader.loadClass after resolveClass: " + name +
"; Class: " + c + "; ClassLoader: " + c.getClassLoader());
return c;
}
return super.loadClass(name);
}
private byte[] locateBytes() throws IOException {
try {
JarFile jar = new JarFile("Agent.jar");
InputStream is = jar.getInputStream(jar.getEntry("Agent.class"));
int len = is.available();
byte[] buf = new byte[len];
DataInputStream in = new DataInputStream(is);
in.readFully(buf);
return buf;
} catch (IOException ioe) {
ioe.printStackTrace();
throw new IOException("Test failed due to IOException!");
}
}
void appendToClassPathForInstrumentation(String path) {
out.println("CustomLoader.appendToClassPathForInstrumentation: " +
this + ", jar: " + path);
failed = false;
}
}
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