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/*******************************************************************************
* Copyright (c) 2013 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package test.bug375784;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
public class Activator implements BundleActivator {
public void start(BundleContext context) throws Exception {
final ClassLoader parent = getClass().getClassLoader();
// create a custom class loader that uses a bundle's class loader as the parent
ClassLoader testCL = new ClassLoader(parent) {
@Override
protected synchronized Class<?> loadClass(String name, boolean resolve) throws ClassNotFoundException {
if ("test.bug375784.Test".equals(name)) {
URL classURL = this.getClass().getResource("Test.class");
if (classURL == null) {
throw new ClassNotFoundException(name);
}
byte[] bytes;
try {
bytes = getBytes(classURL);
return defineClass(name, bytes, 0, bytes.length);
} catch (IOException e) {
throw new ClassNotFoundException(name, e);
}
}
return super.loadClass(name, resolve);
}
};
// Load a class that expects to be able to have free access to SaxParserFactory
Class clazz;
try {
clazz = testCL.loadClass("test.bug375784.Test");
} catch (ClassNotFoundException e) {
throw new RuntimeException(e);
}
try {
clazz.newInstance();
throw new RuntimeException("Should have failed to create object from class: " + clazz);
} catch (NoClassDefFoundError e) {
// expected
}
}
public static byte[] getBytes(URL url) throws IOException {
InputStream in = url.openStream();
byte[] classbytes;
int bytesread = 0;
int readcount;
try {
int length = 1024;
classbytes = new byte[length];
readloop: while (true) {
for (; bytesread < length; bytesread += readcount) {
readcount = in.read(classbytes, bytesread, length - bytesread);
if (readcount <= 0) /* if we didn't read anything */
break readloop; /* leave the loop */
}
byte[] oldbytes = classbytes;
length += 1024;
classbytes = new byte[length];
System.arraycopy(oldbytes, 0, classbytes, 0, bytesread);
}
if (classbytes.length > bytesread) {
byte[] oldbytes = classbytes;
classbytes = new byte[bytesread];
System.arraycopy(oldbytes, 0, classbytes, 0, bytesread);
}
} finally {
try {
in.close();
} catch (IOException ee) {
// nothing to do here
}
}
return classbytes;
}
public void stop(BundleContext context) throws Exception {
// Nothing
}
}
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