001    /*
002     * Copyright (C) 2006-2007 the original author or authors.
003     *
004     * Licensed under the Apache License, Version 2.0 (the "License");
005     * you may not use this file except in compliance with the License.
006     * You may obtain a copy of the License at
007     *
008     *     http://www.apache.org/licenses/LICENSE-2.0
009     *
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed under the License is distributed on an "AS IS" BASIS,
012     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013     * See the License for the specific language governing permissions and
014     * limitations under the License.
015     */
016    
017    package org.codehaus.gmaven.runtime.support.util;
018    
019    import java.security.Permission;
020    
021    /**
022     * Custom security manager to {@link System#exit} (and related) from being used.
023     *
024     * @version $Id: NoExitSecurityManager.java 18 2009-07-16 09:39:40Z user57 $
025     * @author <a href="mailto:jason@planet57.com">Jason Dillon</a>
026     */
027    public class NoExitSecurityManager
028        extends SecurityManager
029    {
030        private final SecurityManager parent;
031    
032        public NoExitSecurityManager(final SecurityManager parent) {
033            assert parent != null;
034    
035            this.parent = parent;
036        }
037    
038        public NoExitSecurityManager() {
039            this(System.getSecurityManager());
040        }
041    
042        public void checkPermission(final Permission perm) {
043            if (parent != null) {
044                parent.checkPermission(perm);
045            }
046        }
047    
048        /**
049         * Always throws {@link SecurityException}.
050         */
051        public void checkExit(final int code) {
052            throw new SecurityException("Use of System.exit() if forbidden!");
053        }
054    
055        /*
056        public void checkPermission(final Permission perm) {
057            assert perm != null;
058    
059            if (perm.getName().equals("exitVM")) {
060                System.out.println("exitVM");
061            }
062        }
063        */
064    }