/*
* JBoss, Home of Professional Open Source.
* Copyright 2008, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.picketlink.identity.federation.bindings.tomcat.sp;
import java.lang.reflect.Method;
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);
}
}
/**
* Use reflection to get the {@link Method} on a {@link Class} with the given parameter types
*
* @param clazz
* @param methodName
* @param parameterTypes
*
* @return
*/
static Method getMethod(final Class<?> clazz, final String methodName, final Class<?>[] parameterTypes) {
SecurityManager sm = System.getSecurityManager();
if (sm != null) {
return AccessController.doPrivileged(new PrivilegedAction<Method>() {
public Method run() {
try {
return clazz.getDeclaredMethod(methodName, parameterTypes);
} catch (Exception e) {
return null;
}
}
});
} else {
try {
return clazz.getDeclaredMethod(methodName, parameterTypes);
} catch (Exception e) {
return null;
}
}
}
}