| /* |
| * Copyright (c) 1998, 2006, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.security.action; |
| |
| /** |
| * A convenience class for retrieving the <code>Long</code> value of a system |
| * property as a privileged action. |
| * |
| * <p>An instance of this class can be used as the argument of |
| * <code>AccessController.doPrivileged</code>. |
| * |
| * <p>The following code retrieves the <code>Long</code> value of the system |
| * property named <code>"prop"</code> as a privileged action. Since it does |
| * not pass a default value to be used in case the property |
| * <code>"prop"</code> is not defined, it has to check the result for |
| * <code>null</code>: <p> |
| * |
| * <pre> |
| * Long tmp = java.security.AccessController.doPrivileged |
| * (new sun.security.action.GetLongAction("prop")); |
| * long l; |
| * if (tmp != null) { |
| * l = tmp.longValue(); |
| * } |
| * </pre> |
| * |
| * <p>The following code retrieves the <code>Long</code> value of the system |
| * property named <code>"prop"</code> as a privileged action, and also passes |
| * a default value to be used in case the property <code>"prop"</code> is not |
| * defined: <p> |
| * |
| * <pre> |
| * long l = java.security.AccessController.doPrivileged |
| * (new GetLongAction("prop")).longValue(); |
| * </pre> |
| * |
| * @author Roland Schemers |
| * @see java.security.PrivilegedAction |
| * @see java.security.AccessController |
| * @since 1.2 |
| */ |
| |
| public class GetLongAction implements java.security.PrivilegedAction<Long> { |
| private String theProp; |
| private long defaultVal; |
| private boolean defaultSet = false; |
| |
| /** |
| * Constructor that takes the name of the system property whose |
| * <code>Long</code> value needs to be determined. |
| * |
| * @param theProp the name of the system property. |
| */ |
| public GetLongAction(String theProp) { |
| this.theProp = theProp; |
| } |
| |
| /** |
| * Constructor that takes the name of the system property and the default |
| * value of that property. |
| * |
| * @param theProp the name of the system property. |
| * @param defaulVal the default value. |
| */ |
| public GetLongAction(String theProp, long defaultVal) { |
| this.theProp = theProp; |
| this.defaultVal = defaultVal; |
| this.defaultSet = true; |
| } |
| |
| /** |
| * Determines the <code>Long</code> value of the system property whose |
| * name was specified in the constructor. |
| * |
| * <p>If there is no property of the specified name, or if the property |
| * does not have the correct numeric format, then a <code>Long</code> |
| * object representing the default value that was specified in the |
| * constructor is returned, or <code>null</code> if no default value was |
| * specified. |
| * |
| * @return the <code>Long</code> value of the property. |
| */ |
| public Long run() { |
| Long value = Long.getLong(theProp); |
| if ((value == null) && defaultSet) |
| return new Long(defaultVal); |
| return value; |
| } |
| } |