Comments on: Finding selected checkbox items in a JSF dataTable

By: Sathish

Sathish — Mon, 28 Jun 2010 06:00:44 +0000

Thanks to all articles and comments , it is very much useful for fresh developers and most of others

thanks a lot , keep posting like wise articles

By: Anonymous Coward

Anonymous Coward — Tue, 15 Jun 2010 22:45:46 +0000

Thank you! Saved me probably 25 minutes of thinking.

By: stevi

stevi — Tue, 15 Jun 2010 17:03:47 +0000

novino,
I’d look at your UserBean.java file at line 298 and figure out why it’s throwing a null pointer exception.

By: novino

novino — Tue, 15 Jun 2010 14:49:58 +0000

Hi Stevi,

I tried the same but I’m getting following Exception. Do you have any suggestion on this.

Thanks.

java.lang.NullPointerException
at com.geae.empis.bean.UserBean.deletePan(UserBean.java:298)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.apache.el.parser.AstValue.invoke(AstValue.java:131)
at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:276)
at org.apache.jasper.el.JspMethodExpression.invoke(JspMethodExpression.java:68)
at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:88
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)
at javax.faces.component.UICommand.broadcast(UICommand.java:387)
at org.ajax4jsf.component.AjaxViewRoot.processEvents(AjaxViewRoot.java:184)
at org.ajax4jsf.component.AjaxViewRoot.broadcastEvents(AjaxViewRoot.java:162)
at org.ajax4jsf.component.AjaxViewRoot.processApplication(AjaxViewRoot.java:350)
at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:82)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:265)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:141)
at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:281)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:228)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:216)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:634)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:445)
at java.lang.Thread.run(Thread.java:595)

By: Geraldo Luiz

Geraldo Luiz — Thu, 14 Jan 2010 21:01:17 +0000

I use a similar aproach. But, like you, I’m also not very fond of messing with my domain objects, introducing an artificial atribute that doesn’t belong there.

Maybe it’s possible to extend the DataModel abstract class as a MultipleSelectionEntityDataModel or something like that. The default DataModel (and its derived concrete classes) models a single selection collection, so we must add methods to get and set the selected rows indexes, and the implementation of the getRowIndex() and setRowIndex() abstract methods may return, for example, the first selected one.

It’s just a thought. I will play with this idea, when I have a spare time, and I inform here if I have any success sith this aproach.

By: Rajneesh

Rajneesh — Wed, 15 Jul 2009 08:57:16 +0000

We are also using the same approach. But, this approach has a problem

e.g. you have a list of 10 items, and you used same approach to select the fist time and then perform a delete operation on that.

Now, once this is done and we have left 9 items in the list. Suppose, you press F5 from IE browser, now image what will be happen?

It sends, the request again to the server and tables sets again the first time selected because it is on the same index and gets deleted as well.

I am trying to figure out how to resolve this problem, within same approach.

By: thachthao

thachthao — Mon, 25 May 2009 15:31:29 +0000

can you tell me how to display list on jsf page. I have the list String and want to display each element on jsf throught datatable

By: thachthao

thachthao — Mon, 25 May 2009 15:24:49 +0000

please tell me the way to do datatable contain together.

By: varun

varun — Fri, 13 Mar 2009 09:36:56 +0000

Piece of code was very useful, could you plz also tell, way to refersh data table with new data.

By: emilio norrmann

emilio norrmann — Wed, 21 Jan 2009 11:31:02 +0000

very useful !
thanks a lot