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/*
 * Copyright 2011 Red Hat inc. and third party contributors as noted 
 * by the author tags.
 * 
 * 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 ceylon.modules.jboss.runtime;

import org.jboss.modules.Module;

import java.security.AccessController;
import java.security.PrivilegedAction;
import java.security.PrivilegedExceptionAction;

/**
 * Security actions.
 *
 * @author Ales Justin
 */
class SecurityActions {
    /**
     * Get classloader from a module.
     *
     * @param module the current module
     * @return module's classloader
     */
    static ClassLoader getClassLoader(final Module module) {
        final SecurityManager sm = System.getSecurityManager();
        if (sm != null) {
            return AccessController.doPrivileged(new PrivilegedAction() {
                public ClassLoader run() {
                    return module.getClassLoader();
                }
            });
        } else {
            return module.getClassLoader();
        }
    }

    public static ClassLoader setContextClassLoader(final ClassLoader cl) throws Exception {
        final SecurityManager sm = System.getSecurityManager();
        if (sm != null) {
            return (ClassLoader) AccessController.doPrivileged(new PrivilegedExceptionAction