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Java > Open Source Codes > de > webman > acl > eventhandler > ACTaskDeleteEventHandler


1 package de.webman.acl.eventhandler;
2
3 import java.util.*;
4
5 import com.teamkonzept.web.*;
6 import com.teamkonzept.lib.*;
7 import com.teamkonzept.webman.*;
8 import com.teamkonzept.webman.mainint.*;
9 import com.teamkonzept.webman.mainint.events.*;
10 import de.webman.acl.*;
11
12 /**
13 Deletes a task definition from the database
14  * @author $Author: alex $
15  * @version $Revision: 1.3 $
16  */
17 public class ACTaskDeleteEventHandler extends DefaultEventHandler implements ParameterTypes, DatabaseDefaults, FrameConstants
18 {
19 private ACTaskDeleteEventHandler() {}
20
21     private static ACTaskDeleteEventHandler instance = new ACTaskDeleteEventHandler();
22
23     public static ACTaskDeleteEventHandler getInstance()
24     {
25         return instance;
26     }
27
28     public void handleEvent(TKEvent evt) throws TKException
29     {
30         try {
31             WebManEvent.checkEvent(evt.getRemoteUser(), evt.getName(), ContextConstants.ACCESS_CONTROL);
32             String JavaDoc taskId = evt.getParameter(PARAMETER, "TASK_ID");
33             if (taskId != null) {
34                 Task theTask = TaskFactory.getInstance().getTask(new Integer JavaDoc(taskId));
35                 if (theTask != null) {
36                     TaskFactory.getInstance().deleteTask(theTask);
37                 }
38             }
39             
40             TKHTMLTemplate t = evt.getPrepHTMLTemplate( "f_ac_task.tmpl" );
41             HTMLUtils.fillFrameSet( t, HTMLUtils.LEFT_FRAME_WIDTH, "AC_TASK_LIST", "EMPTY" );
42             WebManEvent.fillEventsIntoTemplate(evt.getRemoteUser(), t, ACCESS_CONTROL);
43             evt.finishTemplate( t );
44         } catch (Throwable JavaDoc e) {
45             throw WebmanExceptionHandler.getException(e);
46         }
47     }
48
49     public boolean isHandler(TKEvent evt)
50     {
51         return evt.getName().equalsIgnoreCase( "AC_TASK_DELETE" );
52     }
53
54 }
55
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