OpenCard  
 
OCF, the OpenCard Framework is a standard Java framework for working with Smart Cards.  
 

opencard.core.util
Class SystemAccess

java.lang.Object
  |
  +--opencard.core.util.SystemAccess
Direct Known Subclasses:
MicrosoftSystemAccess, NetscapeSystemAccess
public class SystemAccess
extends java.lang.Object

Singleton that provides access to protected system resources like file I/O, properties, native code. Thread safe: each thread can only access its own SystemAccess class.
This is the default SystemAccess class used by OpenCard. To run OpenCard under a browser install the browser specific SystemAccess class in the applets init() method as follows:
opencard.core.util.SystemAccess sys = opencard.opt.vendorX.VendorXSystemAccess(); opencard.core.util.SystemAccess.setSystemAccess(sys);

Version:
$Id: SystemAccess.java,v 1.1.1.1 1999/10/05 15:34:32 damke Exp $
See Also:
MicrosoftSystemAccess, NetscapeSystemAccess

Constructor Summary
SystemAccess()
           
 
Method Summary
 boolean getBoolean(java.lang.String key)
          Access system properties
 java.util.Properties getProperties()
          Access system properties
 java.lang.String getProperty(java.lang.String key)
          Access system properties
 java.lang.String getProperty(java.lang.String key, java.lang.String def)
          Access system properties
static SystemAccess getSystemAccess()
          Return the instance of SystemAccess associated with the current thread.
 void loadLibrary(java.lang.String libName)
          Link to a native DLL.
 java.util.Properties loadProperties(java.lang.String filename)
          Access system properties
static void setSystemAccess(SystemAccess newSystemAccess)
          Set the SystemAccess instance for the current thread.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

SystemAccess

public SystemAccess()
Method Detail

getBoolean

public boolean getBoolean(java.lang.String key)
Access system properties

getProperties

public java.util.Properties getProperties()
Access system properties

getProperty

public java.lang.String getProperty(java.lang.String key)
Access system properties

getProperty

public java.lang.String getProperty(java.lang.String key,
                                    java.lang.String def)
Access system properties

getSystemAccess

public static SystemAccess getSystemAccess()
Return the instance of SystemAccess associated with the current thread. If the current thread has not set its own SystemAccess instance return the default system access instance.

loadLibrary

public void loadLibrary(java.lang.String libName)
Link to a native DLL.

loadProperties

public java.util.Properties loadProperties(java.lang.String filename)
                                    throws java.io.FileNotFoundException,
                                           java.io.IOException
Access system properties

setSystemAccess

public static void setSystemAccess(SystemAccess newSystemAccess)
Set the SystemAccess instance for the current thread. This allows a thread to set a browser specific object that requests privileges from the browser VM by using proprietary mechanisms (e.g. netscape.security.PrivilegeManager.enablePrivilege() )