SecurityActions.java

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you 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.cxf.resource;

import java.io.File;
import java.security.AccessController;
import java.security.Permission;
import java.security.PrivilegedAction;

final class SecurityActions {

    private SecurityActions() {
    }

    static boolean fileExists(final File file, Permission permission) {
        SecurityManager sm = System.getSecurityManager();
        if (sm == null) {
            return file.exists();
        } else {
            sm.checkPermission(permission);
            return AccessController.doPrivileged(new PrivilegedAction<Boolean>() {
                public Boolean run() {
                    return file.exists();
                }
            });
        }
    }
}