/*
* 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.identity.federation.core.saml.v2.util;
import java.security.AccessController;
import java.security.PrivilegedAction;
/**
* Privileged Blocks
*
* @author Anil.Saldhana@redhat.com
* @since Dec 9, 2008
*/
class SecurityActions {
/**
* <p>
* Loads a {@link Class} using the <code>fullQualifiedName</code> supplied. This method tries first to load from
* the
* specified {@link Class}, if not found it will try to load from using TCL.
* </p>
*
* @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<Class<?>>() {
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;
}
}
/**
* <p>
* Loads a class from the specified {@link ClassLoader} using the <code>fullQualifiedName</code> supplied.
* </p>
*
* @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<Class<?>>() {
public Class<?> run() {
try {
return classLoader.loadClass(fullQualifiedName);
} catch (ClassNotFoundException e) {
}
return null;
}
});
} else {
try {
return classLoader.loadClass(fullQualifiedName);
} catch (ClassNotFoundException e) {
}
return null;
}
}
/**
* <p>Returns a system property value using the specified <code>key</code>. If not found the
* <code>defaultValue</code> will be returned.</p>
*
* @param key
* @param defaultValue
*
* @return
*/
static String getSystemProperty(final String key, final String defaultValue) {
SecurityManager sm = System.getSecurityManager();
if (sm != null) {
return AccessController.doPrivileged(new PrivilegedAction<String>() {
public String run() {
return System.getProperty(key, defaultValue);
}
});
} else {
return System.getProperty(key, defaultValue);
}
}
/**
* Get the Thread Context ClassLoader
*
* @return
*/
static ClassLoader getTCCL() {
if (System.getSecurityManager() != null) {
return AccessController.doPrivileged(new PrivilegedAction<ClassLoader>() {
public ClassLoader run() {
return Thread.currentThread().getContextClassLoader();
}
});
} else {
return Thread.currentThread().getContextClassLoader();
}
}
/**
* Set the Thread Context ClassLoader
*
* @param paramCl
*/
static void setTCCL(final ClassLoader paramCl) {
if (System.getSecurityManager() != null) {
AccessController.doPrivileged(new PrivilegedAction<Void>() {
public Void run() {
Thread.currentThread().setContextClassLoader(paramCl);
return null;
}
});
} else {
Thread.currentThread().setContextClassLoader(paramCl);
}
}
}