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ClassDefiningJRubyClassLoader.java
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ClassDefiningJRubyClassLoader.java
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/*
**** BEGIN LICENSE BLOCK *****
* Version: EPL 2.0/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Eclipse Public
* License Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.eclipse.org/legal/epl-v20.html
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the EPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the EPL, the GPL or the LGPL.
***** END LICENSE BLOCK *****/
package org.jruby.util;
import java.net.URL;
import java.net.URLClassLoader;
import java.security.ProtectionDomain;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentSkipListSet;
public class ClassDefiningJRubyClassLoader extends URLClassLoader implements ClassDefiningClassLoader {
public final static ProtectionDomain DEFAULT_DOMAIN;
private final Set<String> definedClasses = new ConcurrentSkipListSet<>();
static {
ProtectionDomain defaultDomain = null;
try {
defaultDomain = JRubyClassLoader.class.getProtectionDomain();
} catch (SecurityException se) {
// just use null since we can't acquire protection domain
}
DEFAULT_DOMAIN = defaultDomain;
}
public ClassDefiningJRubyClassLoader(ClassLoader parent) {
super(new URL[0], parent);
}
public Class<?> defineClass(String name, byte[] bytes) {
Class<?> aClass = super.defineClass(name, bytes, 0, bytes.length, DEFAULT_DOMAIN);
definedClasses.add(name);
return aClass;
}
public Class<?> defineClass(String name, byte[] bytes, ProtectionDomain domain) {
Class<?> aClass = super.defineClass(name, bytes, 0, bytes.length, domain);
definedClasses.add(name);
return aClass;
}
/**
* Return true if the class is loadable in this classloader, false otherwise.
*
* @param name the class name
* @return whether it's loadable
*/
public boolean hasClass(String name) {
return hasDefinedClass(name) || super.findResource(name.replace('.', '/') + ".class") != null;
}
@Override
public boolean hasDefinedClass(String name) {
return definedClasses.contains(name);
}
}