org.picketlink.common.util.SecurityActions Maven / Gradle / Ivy
/*
* JBoss, Home of Professional Open Source
*
* Copyright 2013 Red Hat, Inc. and/or its affiliates.
*
* 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.picketlink.common.util;
import java.net.URL;
import java.security.AccessController;
import java.security.PrivilegedAction;
/**
* Privileged Blocks
*
* @author [email protected]
* @since Dec 9, 2008
*/
class SecurityActions {
/**
*
* Loads a {@link Class} using the fullQualifiedName supplied. This method tries first to load from the
* specified {@link Class}, if not found it will try to load from using TCL.
*
*
* @param theClass
* @param fullQualifiedName
* @return
*/
static Class loadClass(final Class theClass, final String fullQualifiedName) {
SecurityManager sm = System.getSecurityManager();
if (sm != null) {
return AccessController.doPrivileged(new PrivilegedAction>() {
public Class run() {
ClassLoader classLoader = theClass.getClassLoader();
Class clazz = loadClass(classLoader, fullQualifiedName);
if (clazz == null) {
classLoader = Thread.currentThread().getContextClassLoader();
clazz = loadClass(classLoader, fullQualifiedName);
}
return clazz;
}
});
} else {
ClassLoader classLoader = theClass.getClassLoader();
Class clazz = loadClass(classLoader, fullQualifiedName);
if (clazz == null) {
classLoader = Thread.currentThread().getContextClassLoader();
clazz = loadClass(classLoader, fullQualifiedName);
}
return clazz;
}
}
/**
*
* Loads a class from the specified {@link ClassLoader} using the fullQualifiedName supplied.
*
*
* @param classLoader
* @param fullQualifiedName
* @return
*/
static Class loadClass(final ClassLoader classLoader, final String fullQualifiedName) {
SecurityManager sm = System.getSecurityManager();
if (sm != null) {
return AccessController.doPrivileged(new PrivilegedAction>() {
public Class run() {
try {
return classLoader.loadClass(fullQualifiedName);
} catch (ClassNotFoundException e) {
}
return null;
}
});
} else {
try {
return classLoader.loadClass(fullQualifiedName);
} catch (ClassNotFoundException e) {
}
return null;
}
}
/**
* Load a resource based on the passed {@link Class} classloader. Failing which try with the Thread Context CL
*
* @param clazz
* @param resourceName
* @return
*/
static URL loadResource(final Class clazz, final String resourceName) {
SecurityManager sm = System.getSecurityManager();
if (sm != null) {
return AccessController.doPrivileged(new PrivilegedAction() {
public URL run() {
URL url = null;
ClassLoader clazzLoader = clazz.getClassLoader();
url = clazzLoader.getResource(resourceName);
if (url == null) {
clazzLoader = Thread.currentThread().getContextClassLoader();
url = clazzLoader.getResource(resourceName);
}
return url;
}
});
} else {
URL url = null;
ClassLoader clazzLoader = clazz.getClassLoader();
url = clazzLoader.getResource(resourceName);
if (url == null) {
clazzLoader = Thread.currentThread().getContextClassLoader();
url = clazzLoader.getResource(resourceName);
}
return url;
}
}
/**
* Set the system property
*
* @param key
* @param defaultValue
* @return
*/
static void setSystemProperty(final String key, final String value) {
SecurityManager sm = System.getSecurityManager();
if (sm != null) {
AccessController.doPrivileged(new PrivilegedAction