/*******************************************************************************
*
* Copyright (c) 2004-2009, Oracle Corporation
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
*
*
*
*
*******************************************************************************/
package hudson.util;
import java.util.Collection;
/**
* {@link ClassLoader} that masks a specified set of classes from its parent
* class loader.
*
* <p> This code is used to create an isolated environment.
*
* @author Kohsuke Kawaguchi
*/
public class MaskingClassLoader extends ClassLoader {
/**
* Prefix of the packages that should be hidden.
*/
private final String[] masks;
public MaskingClassLoader(ClassLoader parent, String... masks) {
super(parent);
this.masks = masks;
}
public MaskingClassLoader(ClassLoader parent, Collection<String> masks) {
this(parent, masks.toArray(new String[masks.size()]));
}
@Override
protected synchronized Class<?> loadClass(String name, boolean resolve) throws ClassNotFoundException {
for (String mask : masks) {
if (name.startsWith(mask)) {
throw new ClassNotFoundException();
}
}
return super.loadClass(name, resolve);
}
}