/*
* 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.sts;
import java.net.URL;
import java.security.AccessController;
import java.security.PrivilegedAction;
/**
* <p>
* Utility class that executes actions such as creating a class in privileged blocks.
* </p>
*
* @author <a href="mailto:sguilhen@redhat.com">Stefan Guilhen</a>
*/
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;
}
}
/**
* 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<URL>() {
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;
}
}
static ClassLoader getClassLoader(final Class<?> clazz) {
SecurityManager sm = System.getSecurityManager();
if (sm != null) {
return AccessController.doPrivileged(new PrivilegedAction<ClassLoader>() {
public ClassLoader run() {
return clazz.getClassLoader();
}
});
} else {
return clazz.getClassLoader();
}
}
}