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/*
 * Copyright  2001-2002,2004-2005 The Apache Software Foundation
 *
 *  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.apache.tools.ant.util.optional;

import java.security.Permission;
import org.apache.tools.ant.ExitException;

/**
 * This is intended as a replacement for the default system manager.
 * The goal is to intercept System.exit calls and make it throw an
 * exception instead so that a System.exit in a task does not
 * fully terminate Ant.
 *
 * @see ExitException
 */
public class NoExitSecurityManager extends SecurityManager {

    /**
     * Override SecurityManager#checkExit.
     * This throws an ExitException(status) exception.
     * @param status the exit status
     */
    public void checkExit(int status) {
        throw new ExitException(status);
    }

    /**
     * Override SecurityManager#checkPermission.
     * This does nothing.
     * @param perm the requested permission.
     */
    public void checkPermission(Permission perm) {
        // no permission here
    }
}