Package opencard.core.util

Class SystemAccess

  • 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);
    Author:
    Peter Bendel (peter_bendel@de.bm.com)
    See Also:
    opencard.opt.ms.MicrosoftSystemAccess, opencard.opt.netscape.NetscapeSystemAccess

    • Constructor Summary

      Constructors 
      Constructor Description
      SystemAccess()  

    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      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
        Throws:
        java.io.FileNotFoundException
        java.io.IOException

      • 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() )