org.jboss.modules.ClassLoaderLocalLoader Maven / Gradle / Ivy
/*
* JBoss, Home of Professional Open Source.
* Copyright 2014 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* Licensed under the Apache 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.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jboss.modules;
import java.io.IOException;
import java.lang.reflect.UndeclaredThrowableException;
import java.net.URL;
import java.net.URLConnection;
import java.security.AccessControlContext;
import java.security.PrivilegedActionException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Enumeration;
import java.util.List;
import static java.security.AccessController.doPrivileged;
import static java.security.AccessController.getContext;
/**
* @author David M. Lloyd
*/
final class ClassLoaderLocalLoader implements LocalLoader {
static final LocalLoader SYSTEM = JDKSpecific.getSystemLocalLoader();
private final ClassLoader classLoader;
private final AccessControlContext context;
/**
* Construct a new instance.
*
* @param classLoader the classloader to which we delegate
*/
ClassLoaderLocalLoader(final ClassLoader classLoader) {
this.classLoader = classLoader;
context = getContext();
}
// Public members
public Class loadClassLocal(final String name, final boolean resolve) {
try {
return Class.forName(name, resolve, classLoader);
} catch (ClassNotFoundException e) {
final Throwable cause = e.getCause();
if (cause instanceof Error) {
throw (Error) cause;
} else if (cause instanceof RuntimeException) {
//unlikely
throw (RuntimeException) cause;
}
return null;
}
}
public Package loadPackageLocal(final String name) {
return JDKSpecific.getPackage(classLoader, name);
}
public List loadResourceLocal(final String name) {
final Enumeration urls;
ClassLoader classLoader = this.classLoader;
try {
if (classLoader == null) {
urls = JDKSpecific.getSystemResources(name);
} else {
urls = classLoader.getResources(name);
}
} catch (IOException e) {
return Collections.emptyList();
}
final List list = new ArrayList();
while (urls.hasMoreElements()) {
final URL url = urls.nextElement();
URLConnection connection = null;
try {
connection = doPrivileged(new GetURLConnectionAction(url), context);
} catch (PrivilegedActionException e) {
try {
throw e.getException();
} catch (IOException e2) {
// omit from list
} catch (RuntimeException re) {
throw re;
} catch (Exception e2) {
throw new UndeclaredThrowableException(e2);
}
}
list.add(new URLConnectionResource(connection));
}
return list;
}
}