http://www.jboss.org/undertow-parent/undertow-servlet: Undertow (JBoss by Red Hat) 
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 * JBoss, Home of Professional Open Source.
 * Copyright 2019 Red Hat, Inc., and individual contributors
 * as indicated 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 io.undertow.servlet.api;


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

final class SecurityActions {

    private SecurityActions() {
        // forbidden inheritance
    }

    static String getSystemProperty(final String prop) {
        if (System.getSecurityManager() == null) {
            return System.getProperty(prop);
        } else {
            return (String) AccessController.doPrivileged(new PrivilegedAction<Object>() {
                public Object run() {
                    return System.getProperty(prop);
                }
            });
        }
    }
}