001/* 002 * HA-JDBC: High-Availability JDBC 003 * Copyright (C) 2012 Paul Ferraro 004 * 005 * This program is free software: you can redistribute it and/or modify 006 * it under the terms of the GNU Lesser General Public License as published by 007 * the Free Software Foundation, either version 3 of the License, or 008 * (at your option) any later version. 009 * 010 * This program is distributed in the hope that it will be useful, 011 * but WITHOUT ANY WARRANTY; without even the implied warranty of 012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 013 * GNU Lesser General Public License for more details. 014 * 015 * You should have received a copy of the GNU Lesser General Public License 016 * along with this program. If not, see <http://www.gnu.org/licenses/>. 017 */ 018package net.sf.hajdbc.util; 019 020import java.security.PrivilegedAction; 021import java.util.Properties; 022 023public class SystemProperties 024{ 025 public static String getSystemProperty(String name) 026 { 027 return getSystemProperty(name, null); 028 } 029 030 public static String getSystemProperty(final String name, final String defaultValue) 031 { 032 PrivilegedAction<String> action = new PrivilegedAction<String>() 033 { 034 @Override 035 public String run() 036 { 037 return System.getProperty(name, defaultValue); 038 } 039 }; 040 return Security.run(action); 041 } 042 043 public static Properties getSystemProperties() 044 { 045 PrivilegedAction<Properties> action = new PrivilegedAction<Properties>() 046 { 047 @Override 048 public Properties run() 049 { 050 return System.getProperties(); 051 } 052 }; 053 return Security.run(action); 054 } 055 056 public static void setSystemProperty(final String name, final String value) 057 { 058 PrivilegedAction<Void> action = new PrivilegedAction<Void>() 059 { 060 @Override 061 public Void run() 062 { 063 System.setProperty(name, value); 064 return null; 065 } 066 }; 067 Security.run(action); 068 } 069 070 private SystemProperties() 071 { 072 // Hide 073 } 074}