/*
* JBoss, Home of Professional Open Source
* Copyright 2012, Red Hat Middleware LLC, and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* 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.shrinkwrap.resolver.impl.maven.util;
import java.security.AccessController;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;
SecurityActions
A set of privileged actions that are not to leak out of this package
Author: ALR, Karel Piwko
/**
* SecurityActions
*
* A set of privileged actions that are not to leak out of this package
*
*
* @author <a href="mailto:andrew.rubinger@jboss.org">ALR</a>
* @author <a href="mailto:kpiwko@redhat.com">Karel Piwko</a>
*/
final class SecurityActions {
No instantiation
/**
* No instantiation
*/
private SecurityActions() {
throw new UnsupportedOperationException("No instantiation");
}
static String getProperty(final String key) {
try {
String value = AccessController.doPrivileged(new PrivilegedExceptionAction<String>() {
@Override
public String run() {
return System.getProperty(key);
}
});
return value;
}
// Unwrap
catch (final PrivilegedActionException pae) {
final Throwable t = pae.getCause();
// Rethrow
if (t instanceof SecurityException) {
throw (SecurityException) t;
}
if (t instanceof NullPointerException) {
throw (NullPointerException) t;
} else if (t instanceof IllegalArgumentException) {
throw (IllegalArgumentException) t;
} else {
// No other checked Exception thrown by System.getProperty
try {
throw (RuntimeException) t;
}
// Just in case we've really messed up
catch (final ClassCastException cce) {
throw new RuntimeException("Obtained unchecked Exception; this code should never be reached", t);
}
}
}
}
}