java.lang.ClassCastException when I try to filter a date field of my table

[Former Member]

Hi all,

I am getting this exception, java.lang.ClassCastException when I try to filter a date field in my table.

The filter works fine on other columns of the table which are not of type date.

I have created a simple-type called myDate which is of type date. The type of the date field in my table is bound to this type myDate.

Here is the full exception chain,

java.lang.ClassCastException

at com.sap.tc.webdynpro.progmodel.context.NodeElement.wdpGetString(NodeElement.java:629)

at com.sap.tc.webdynpro.progmodel.context.NodeElement.wdGetString(NodeElement.java:800)

at com.sap.tc.webdynpro.progmodel.context.AttributePointer.getString(AttributePointer.java:176)

at com.sap.tc.webdynpro.clientserver.data.DataContainer.getString(DataContainer.java:915)

at com.sap.tc.webdynpro.clientserver.uielib.standard.impl.TableColumn.getFilterValue(TableColumn.java:496)

at com.sap.tut.webdynpro.admin.FilterTable.prepareFilterValuesByAttribute(FilterTable.java:257)

at com.sap.tut.webdynpro.admin.FilterTable.filter(FilterTable.java:149)

at com.sap.tut.webdynpro.admin.AdministrationView.onActionFilter(AdministrationView.java:1133)

at com.sap.tut.webdynpro.admin.wdp.InternalAdministrationView.wdInvokeEventHandler(InternalAdministrationView.java:210)

at com.sap.tc.webdynpro.progmodel.generation.DelegatingView.invokeEventHandler(DelegatingView.java:87)

at com.sap.tc.webdynpro.progmodel.controller.Action.fire(Action.java:67)

at com.sap.tc.webdynpro.clientserver.window.WindowPhaseModel.doHandleActionEvent(WindowPhaseModel.java:420)

at com.sap.tc.webdynpro.clientserver.window.WindowPhaseModel.processRequest(WindowPhaseModel.java:132)

at com.sap.tc.webdynpro.clientserver.window.WebDynproWindow.processRequest(WebDynproWindow.java:335)

at com.sap.tc.webdynpro.clientserver.cal.AbstractClient.executeTasks(AbstractClient.java:143)

at com.sap.tc.webdynpro.clientserver.session.ApplicationSession.doProcessing(ApplicationSession.java:321)

at com.sap.tc.webdynpro.clientserver.session.ClientSession.doApplicationProcessingPortal(ClientSession.java:733)

at com.sap.tc.webdynpro.clientserver.session.ClientSession.doApplicationProcessing(ClientSession.java:668)

at com.sap.tc.webdynpro.clientserver.session.ClientSession.doProcessing(ClientSession.java:250)

at com.sap.tc.webdynpro.clientserver.session.RequestManager.doProcessing(RequestManager.java:150)

at com.sap.tc.webdynpro.clientserver.session.core.ApplicationHandle.doProcessing(ApplicationHandle.java:73)

at com.sap.tc.webdynpro.portal.pb.impl.AbstractApplicationProxy.sendDataAndProcessActionInternal(AbstractApplicationProxy.java:860)

at com.sap.tc.webdynpro.portal.pb.impl.localwd.LocalApplicationProxy.sendDataAndProcessAction(LocalApplicationProxy.java:77)

at com.sap.portal.pb.PageBuilder.updateApplications(PageBuilder.java:1255)

at com.sap.portal.pb.PageBuilder.SendDataAndProcessAction(PageBuilder.java:325)

at com.sap.portal.pb.PageBuilder$1.doPhase(PageBuilder.java:826)

at com.sap.tc.webdynpro.clientserver.window.WindowPhaseModel.processPhaseListener(WindowPhaseModel.java:755)

at com.sap.tc.webdynpro.clientserver.window.WindowPhaseModel.doPortalDispatch(WindowPhaseModel.java:717)

at com.sap.tc.webdynpro.clientserver.window.WindowPhaseModel.processRequest(WindowPhaseModel.java:136)

at com.sap.tc.webdynpro.clientserver.window.WebDynproWindow.processRequest(WebDynproWindow.java:335)

at com.sap.tc.webdynpro.clientserver.cal.AbstractClient.executeTasks(AbstractClient.java:143)

at com.sap.tc.webdynpro.clientserver.session.ApplicationSession.doProcessing(ApplicationSession.java:321)

at com.sap.tc.webdynpro.clientserver.session.ClientSession.doApplicationProcessingStandalone(ClientSession.java:713)

at com.sap.tc.webdynpro.clientserver.session.ClientSession.doApplicationProcessing(ClientSession.java:666)

at com.sap.tc.webdynpro.clientserver.session.ClientSession.doProcessing(ClientSession.java:250)

at com.sap.tc.webdynpro.clientserver.session.RequestManager.doProcessing(RequestManager.java:150)

at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doContent(DispatcherServlet.java:62)

at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doPost(DispatcherServlet.java:53)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)

at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.runServlet(HttpHandlerImpl.java:401)

at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.handleRequest(HttpHandlerImpl.java:266)

at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:387)

at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:365)

at com.sap.engine.services.httpserver.server.RequestAnalizer.invokeWebContainer(RequestAnalizer.java:944)

at com.sap.engine.services.httpserver.server.RequestAnalizer.handle(RequestAnalizer.java:266)

at com.sap.engine.services.httpserver.server.Client.handle(Client.java:95)

at com.sap.engine.services.httpserver.server.Processor.request(Processor.java:175)

at com.sap.engine.core.service630.context.cluster.session.ApplicationSessionMessageListener.process(ApplicationSessionMessageListener.java:33)

at com.sap.engine.core.cluster.impl6.session.MessageRunner.run(MessageRunner.java:41)

at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:37)

at java.security.AccessController.doPrivileged(Native Method)

at com.sap.engine.core.thread.impl3.SingleThread.execute(SingleThread.java:100)

at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:170)

Please help me solve this. Thanks in advance.

Regards

Kishan

[former_member192434 · Accepted solution]

check the data type of "myDate " and its destination where you are binding it both should be date type.

[Former Member]

Hi Kishan,

You need to change the node type to String else it will give you class cast exception.

Regards

Narendra

[Former Member]

Hi Kishan,

Are you still getting class cast exception?

Yes filter can be applied to this as we have just changed the type from date to String,

So i should work as per my knowledge.

Can you please explain what error you are getting now.

Regards

Narendra

[Former Member]

Hi Narendra,

I am actually not able to deploy the application due to some internal issues.

Will get back to you as soon as I am able to deploy.

Coming to my first doubt, won't I get a Type Mismatch error since I am setting a String value to a Date field?

Regards

Kishan

[Former Member]

Hi Narendra,

I followed your logic but I am getting a Class cast exception. The exception is as follows,

java.lang.ClassCastException: java.lang.String

Regards

Kishan

[Former Member]

Hi Kishan,

if(colType[i-1].equalsIgnoreCase("ddic:com.sap.tut.wd.languages.myDate"))
	String dateFormat="yyyyMMdd";// according to the date format you are using like 22-11-2009 should be dd-MM-yyyy
	SimpleDateFormat dateformatYYYYMMDD = new SimpleDateFormat(dateFormat);
	String date = dateformatYYYYMMDD.format( resultSet.getDate(colName[i-1]) ) ;
	
								
	tableElement.setAttributeValue(colName[i-1],date);

please chcek if this works

Regards

Narendra

[Former Member]

Hi Narendra,

I followed your instructions. But I have the following doubts,

1)

tableElement.setAttributeValue(colName[i-1],date);

As per this code given by you, won't I get a Type Mismatch exception since I am setting a String value to an attribute of type date.

2)Can a table-filter be applied to this date field created as instructed by you?

Regards

Kishan

[Former Member]

Hi Kishan,

I think You need to first convert the date type to String and then you can apply the filter without the class cast exception..

below is the code you can use for converting date to String.

//pass the format of the date you are using 
String dateFormat="yyyyMMdd";
 SimpleDateFormat dateformatYYYYMMDD = new SimpleDateFormat(dateFormat);
String date = dateformatYYYYMMDD.format( dateNow ) ;

Hope this will help

Regards

Narendra

[Former Member]

Hi Narendra,

Thanks for the quick reply.

Where do I need to add the code you mentioned?

I am setting the attribute of type date as below,

if(colType[i-1].equalsIgnoreCase("ddic:com.sap.tut.wd.languages.myDate"))
								
	tableElement.setAttributeValue(colName[i-1],resultSet.getDate(colName[i-1]));

Regards

Kishan

[Former Member]

Hi Anup,

Thanks for the quick reply.

myDate is of type date.

I have bound my context attribute to this type myDate.

I am setting the attribute value as mentioned in my previous post.

Regards

Kishan

[former_member192434]

use the same data type for which it works fine on other columns of the table. still think it should not be the problem for others col of table, if its working for one col......... just check it and let me know.