com.sun.jini.action
Class GetPropertyAction

java.lang.Object
  extended by com.sun.jini.action.GetPropertyAction
All Implemented Interfaces:
PrivilegedAction

public class GetPropertyAction
extends Object
implements PrivilegedAction

A convenience class for retrieving the string value of a system property as a privileged action.

An instance of this class can be used as the argument of AccessController.doPrivileged or Security.doPrivileged.

The following code retrieves the value of the system property named "prop" as a privileged action:

 String s = (String) String.doPrivileged(
                 new GetPropertyAction("prop"));
 

If the protection domain of the immediate caller of doPrivileged or the protection domain of this class does not imply the permissions necessary for the operation, the behavior is as if the system property is not defined.

Since:
2.0
Author:
Sun Microsystems, Inc.
See Also:
PrivilegedAction, AccessController, Security

Field Summary
private  String defaultVal
           
private static Logger logger
           
private  String theProp
           
 
Constructor Summary
GetPropertyAction(String theProp)
          Constructor that takes the name of the system property whose string value needs to be determined.
GetPropertyAction(String theProp, String defaultVal)
          Constructor that takes the name of the system property and the default value of that property.
 
Method Summary
 Object run()
          Determines the string value of the system property whose name was specified in the constructor.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

logger

private static final Logger logger

theProp

private final String theProp

defaultVal

private final String defaultVal
Constructor Detail

GetPropertyAction

public GetPropertyAction(String theProp)
Constructor that takes the name of the system property whose string value needs to be determined.

Parameters:
theProp - the name of the system property

GetPropertyAction

public GetPropertyAction(String theProp,
                         String defaultVal)
Constructor that takes the name of the system property and the default value of that property.

Parameters:
theProp - the name of the system property
defaultVal - the default value
Method Detail

run

public Object run()
Determines the string value of the system property whose name was specified in the constructor.

If the system property is defined, then this method returns its value. Otherwise, if a default value was supplied to this object's constructor, then this method returns that default value, or else null is returned.

Specified by:
run in interface PrivilegedAction
Returns:
the string value of the system property or the default value, or null


Copyright 2007-2010, multiple authors.
Licensed under the Apache License, Version 2.0, see the NOTICE file for attributions.