Showing the changes to java/pkg/sun/security/action/GetLongAction.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 <code>Long</code> 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 <code>Long</code> value of the system | |
| 36 | + * property named <code>"prop"</code> as a privileged action. Since it does | |
| 37 | + * not pass a default value to be used in case the property | |
| 38 | + * <code>"prop"</code> is not defined, it has to check the result for | |
| 39 | + * <code>null</code>: <p> | |
| 40 | + * | |
| 41 | + * <pre> | |
| 42 | + * Long tmp = java.security.AccessController.doPrivileged | |
| 43 | + * (new sun.security.action.GetLongAction("prop")); | |
| 44 | + * long l; | |
| 45 | + * if (tmp != null) { | |
| 46 | + * l = tmp.longValue(); | |
| 47 | + * } | |
| 48 | + * </pre> | |
| 49 | + * | |
| 50 | + * <p>The following code retrieves the <code>Long</code> value of the system | |
| 51 | + * property named <code>"prop"</code> as a privileged action, and also passes | |
| 52 | + * a default value to be used in case the property <code>"prop"</code> is not | |
| 53 | + * defined: <p> | |
| 54 | + * | |
| 55 | + * <pre> | |
| 56 | + * long l = java.security.AccessController.doPrivileged | |
| 57 | + * (new GetLongAction("prop")).longValue(); | |
| 58 | + * </pre> | |
| 59 | + * | |
| 60 | + * @author Roland Schemers | |
| 61 | + * @see java.security.PrivilegedAction | |
| 62 | + * @see java.security.AccessController | |
| 63 | + * @since 1.2 | |
| 64 | + */ | |
| 65 | + | |
| 66 | +public class GetLongAction implements java.security.PrivilegedAction<Long> { | |
| 67 | + private String theProp; | |
| 68 | + private long defaultVal; | |
| 69 | + private boolean defaultSet = false; | |
| 70 | + | |
| 71 | + /** | |
| 72 | + * Constructor that takes the name of the system property whose | |
| 73 | + * <code>Long</code> value needs to be determined. | |
| 74 | + * | |
| 75 | + * @param theProp the name of the system property. | |
| 76 | + */ | |
| 77 | + public GetLongAction(String theProp) { | |
| 78 | + this.theProp = theProp; | |
| 79 | + } | |
| 80 | + | |
| 81 | + /** | |
| 82 | + * Constructor that takes the name of the system property and the default | |
| 83 | + * value of that property. | |
| 84 | + * | |
| 85 | + * @param theProp the name of the system property. | |
| 86 | + * @param defaulVal the default value. | |
| 87 | + */ | |
| 88 | + public GetLongAction(String theProp, long defaultVal) { | |
| 89 | + this.theProp = theProp; | |
| 90 | + this.defaultVal = defaultVal; | |
| 91 | + this.defaultSet = true; | |
| 92 | + } | |
| 93 | + | |
| 94 | + /** | |
| 95 | + * Determines the <code>Long</code> value of the system property whose | |
| 96 | + * name was specified in the constructor. | |
| 97 | + * | |
| 98 | + * <p>If there is no property of the specified name, or if the property | |
| 99 | + * does not have the correct numeric format, then a <code>Long</code> | |
| 100 | + * object representing the default value that was specified in the | |
| 101 | + * constructor is returned, or <code>null</code> if no default value was | |
| 102 | + * specified. | |
| 103 | + * | |
| 104 | + * @return the <code>Long</code> value of the property. | |
| 105 | + */ | |
| 106 | + public Long run() { | |
| 107 | + Long value = Long.getLong(theProp); | |
| 108 | + if ((value == null) && defaultSet) | |
| 109 | + return new Long(defaultVal); | |
| 110 | + return value; | |
| 111 | + } | |
| 112 | +} | |