Showing the changes to java/pkg/sun/security/action/GetPropertyAction.java (1 of 18352 files). Show all
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| 1 | +/* | |
| 2 | + * Copyright (c) 1998, 2006, Oracle and/or its affiliates. All rights reserved. | |
| 3 | + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 | + * | |
| 5 | + * This code is free software; you can redistribute it and/or modify it | |
| 6 | + * under the terms of the GNU General Public License version 2 only, as | |
| 7 | + * published by the Free Software Foundation. Oracle designates this | |
| 8 | + * particular file as subject to the "Classpath" exception as provided | |
| 9 | + * by Oracle in the LICENSE file that accompanied this code. | |
| 10 | + * | |
| 11 | + * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 12 | + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 | + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 | + * version 2 for more details (a copy is included in the LICENSE file that | |
| 15 | + * accompanied this code). | |
| 16 | + * | |
| 17 | + * You should have received a copy of the GNU General Public License version | |
| 18 | + * 2 along with this work; if not, write to the Free Software Foundation, | |
| 19 | + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 20 | + * | |
| 21 | + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 22 | + * or visit www.oracle.com if you need additional information or have any | |
| 23 | + * questions. | |
| 24 | + */ | |
| 25 | + | |
| 26 | +package sun.security.action; | |
| 27 | + | |
| 28 | +/** | |
| 29 | + * A convenience class for retrieving the string value of a system | |
| 30 | + * property as a privileged action. | |
| 31 | + * | |
| 32 | + * <p>An instance of this class can be used as the argument of | |
| 33 | + * <code>AccessController.doPrivileged</code>. | |
| 34 | + * | |
| 35 | + * <p>The following code retrieves the value of the system | |
| 36 | + * property named <code>"prop"</code> as a privileged action: <p> | |
| 37 | + * | |
| 38 | + * <pre> | |
| 39 | + * String s = java.security.AccessController.doPrivileged | |
| 40 | + * (new GetPropertyAction("prop")); | |
| 41 | + * </pre> | |
| 42 | + * | |
| 43 | + * @author Roland Schemers | |
| 44 | + * @see java.security.PrivilegedAction | |
| 45 | + * @see java.security.AccessController | |
| 46 | + * @since 1.2 | |
| 47 | + */ | |
| 48 | + | |
| 49 | +public class GetPropertyAction | |
| 50 | + implements java.security.PrivilegedAction<String> { | |
| 51 | + private String theProp; | |
| 52 | + private String defaultVal; | |
| 53 | + | |
| 54 | + /** | |
| 55 | + * Constructor that takes the name of the system property whose | |
| 56 | + * string value needs to be determined. | |
| 57 | + * | |
| 58 | + * @param theProp the name of the system property. | |
| 59 | + */ | |
| 60 | + public GetPropertyAction(String theProp) { | |
| 61 | + this.theProp = theProp; | |
| 62 | + } | |
| 63 | + | |
| 64 | + /** | |
| 65 | + * Constructor that takes the name of the system property and the default | |
| 66 | + * value of that property. | |
| 67 | + * | |
| 68 | + * @param theProp the name of the system property. | |
| 69 | + * @param defaulVal the default value. | |
| 70 | + */ | |
| 71 | + public GetPropertyAction(String theProp, String defaultVal) { | |
| 72 | + this.theProp = theProp; | |
| 73 | + this.defaultVal = defaultVal; | |
| 74 | + } | |
| 75 | + | |
| 76 | + /** | |
| 77 | + * Determines the string value of the system property whose | |
| 78 | + * name was specified in the constructor. | |
| 79 | + * | |
| 80 | + * @return the string value of the system property, | |
| 81 | + * or the default value if there is no property with that key. | |
| 82 | + */ | |
| 83 | + public String run() { | |
| 84 | + String value = System.getProperty(theProp); | |
| 85 | + return (value == null) ? defaultVal : value; | |
| 86 | + } | |
| 87 | +} | |