Source for gnu.java.security.action.GetSecurityPropertyAction

   1: /* GetSecurityPropertyAction.java
   2:    Copyright (C) 2004 Free Software Foundation, Inc.
   3: 
   4: This file is part of GNU Classpath.
   5: 
   6: GNU Classpath is free software; you can redistribute it and/or modify
   7: it under the terms of the GNU General Public License as published by
   8: the Free Software Foundation; either version 2, or (at your option)
   9: any later version.
  10: 
  11: GNU Classpath is distributed in the hope that it will be useful, but
  12: WITHOUT ANY WARRANTY; without even the implied warranty of
  13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14: General Public License for more details.
  15: 
  16: You should have received a copy of the GNU General Public License
  17: along with GNU Classpath; see the file COPYING.  If not, write to the
  18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19: 02110-1301 USA.
  20: 
  21: Linking this library statically or dynamically with other modules is
  22: making a combined work based on this library.  Thus, the terms and
  23: conditions of the GNU General Public License cover the whole
  24: combination.
  25: 
  26: As a special exception, the copyright holders of this library give you
  27: permission to link this library with independent modules to produce an
  28: executable, regardless of the license terms of these independent
  29: modules, and to copy and distribute the resulting executable under
  30: terms of your choice, provided that you also meet, for each linked
  31: independent module, the terms and conditions of the license of that
  32: module.  An independent module is a module which is not derived from
  33: or based on this library.  If you modify this library, you may extend
  34: this exception to your version of the library, but you are not
  35: obligated to do so.  If you do not wish to do so, delete this
  36: exception statement from your version. */
  37: 
  38: package gnu.java.security.action;
  39: 
  40: import java.security.PrivilegedAction;
  41: import java.security.Security;
  42: 
  43: /**
  44:  * PrivilegedAction implementation that calls Security.getProperty()
  45:  * with the property name passed to its constructor.
  46:  *
  47:  * Example of use:
  48:  * <code>
  49:  * GetSecurityPropertyAction action = new GetSecurityPropertyAction("javax.net.ssl.trustStorePassword");
  50:  * String passwd = AccessController.doPrivileged(action);
  51:  * </code>
  52:  */
  53: public class GetSecurityPropertyAction implements PrivilegedAction<String>
  54: {
  55:   private String name;
  56:   private String value;
  57: 
  58:   public GetSecurityPropertyAction()
  59:   {
  60:   }
  61: 
  62:   public GetSecurityPropertyAction(String propName)
  63:   {
  64:     setParameters(propName);
  65:   }
  66: 
  67:   public GetSecurityPropertyAction(String propName, String defaultValue)
  68:   {
  69:     setParameters(propName, defaultValue);
  70:   }
  71: 
  72:   public GetSecurityPropertyAction setParameters(String propName)
  73:   {
  74:     this.name = propName;
  75:     this.value = null;
  76:     return this;
  77:   }
  78: 
  79:   public GetSecurityPropertyAction setParameters(String propName, String defaultValue)
  80:   {
  81:     this.name = propName;
  82:     this.value = defaultValue;
  83:     return this;
  84:   }
  85: 
  86:   public String run()
  87:   {
  88:     String val = Security.getProperty(name);
  89:     if (val == null)
  90:       val = value;
  91:     return val;
  92:   }
  93: }