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/*
 * JBoss, Home of Professional Open Source
 * Copyright 2012, Red Hat Middleware LLC, and individual contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * 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.jboss.arquillian.daemon.main;

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

/**
 * Not to leak out of this package
 *
 * @author Andrew Lee Rubinger
 */
final class SecurityActions {

    /**
     * No instances
     */
    private SecurityActions() {
        throw new IllegalArgumentException("No instances");
    }

    static String getSystemProperty(final String sysPropName) {
        assert sysPropName != null && sysPropName.length() > 0 : "System property name must be specified";
        if (System.getSecurityManager() == null) {
            return System.getProperty(sysPropName);
        } else {
            return AccessController.doPrivileged(new PrivilegedAction() {
                @Override
                public String run() {
                    return System.getProperty(sysPropName);
                }
            });
        }
    }
}