scone.accesstracking
Class AppletConnector

java.lang.Object
  scone.accesstracking.AppletConnector

All Implemented Interfaces:

ConnectionHandler

public class AppletConnector
extends java.lang.Object
implements ConnectionHandler

Every time, LogApplet connects to RAS (scone.ras.rasServer.java), RAS starts an instance of this class that lives as long as the connection of the applet. This class communicates with the Applet, decodes received messages and calls the corresponding methods of the EventDecoder class, that creates and fills the Access events.

Version:

1.0b, 10/31/2001

Author:

Torsten Hass

Constructor Summary

AppletConnector()

Method Summary

java.lang.String	getParameter(java.lang.String inputLine, java.lang.String paramName) This Method gets the value of the parameter paramName from the String sent by the applet.
void	handle(Connection c) RAS handler for the RAS-Connection from LogApplet.
boolean	sendToApplet(java.lang.String command, java.lang.String parameter1, java.lang.String parameter2) Sends a string back to the Applet, containing the command to be executed by the applet, an url if needed and a target if needed.
boolean	testIsAppletExistent() Sends an empty String to an applet only used to check whether this applet exists or not.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AppletConnector

public AppletConnector()

Method Detail

handle

public void handle(Connection c)

RAS handler for the RAS-Connection from LogApplet. This method is invoked by RASServer when LogApplet connects to RAS.

Specified by:

handle in interface ConnectionHandler

Parameters:

c - The Connection object to communicate with LogApplet

testIsAppletExistent

public boolean testIsAppletExistent()

Sends an empty String to an applet only used to check whether this applet exists or not. This can be used as a hint whether the window exists or not. It will return true if applet exists, false and a java.lang.NullPointerException if not.

sendToApplet

public boolean sendToApplet(java.lang.String command,
                            java.lang.String parameter1,
                            java.lang.String parameter2)

Sends a string back to the Applet, containing the command to be executed by the applet, an url if needed and a target if needed.
e. g. sendToApplet("OpenURL", "www.uni-hamburg.de", "_self");
tells the applet to call another page in the browser.
sendToApplet("BringToFront", "", "");
tells the browser to become the top level window.

Parameters:

command - The command for the Applet (BringToFront or OpenURL) (not casesensitive)

url - The url needed for OpenURL. Send an empty String for other commands.

target - The target needet for OpenURL. Send an empty String for other commands.

getParameter

public java.lang.String getParameter(java.lang.String inputLine,
                                     java.lang.String paramName)

This Method gets the value of the parameter paramName from the String sent by the applet.

Parameters:

paramName - The name of the parameter

Returns:

The requested value