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Error when I select a given data p:datatable

Greenhorn

Posts: 13

posted 8 years ago

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My dataTable of primefaces

lazyDataModel = new LazyDataModel<Funcionario>() 
            {
    
                /**
                 * 
                 */
                private static final long serialVersionUID = 1L;
    
    
    
                @Override
                public List<Funcionario> load(int first, int pageSize,
                        String sortField, SortOrder sortOrder,
                        Map<String, String> filters) {
    
                    try {
                        funcionarios = funcionarioService.listar(first, pageSize, filters);
                    } catch (Exception e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
    
                    }
    
    
                    if(getRowCount() <= 0)
                    {
                        setRowCount(funcionarioService.getRowCount());
                    }
    
                    setPageSize(pageSize);
    
                    super.setWrappedData(funcionarios);
    
                    return funcionarios;
                }
    
    
                @Override
                public Object getRowKey(Funcionario item) {
                    System.out.println(item.getCodigo());
                    return item.getCodigo();
                }
    
    
    
                @Override
                public Funcionario getRowData(String rowKey) {
                    // TODO Auto-generated method stub
    
                    Integer id = Integer.valueOf(rowKey);
    
                    for (Funcionario funcionario : (List<Funcionario>) getWrappedData()) {
    
                        if(id.equals(funcionario.getCodigo()))
                        {
                            return funcionario;
                        }
    
                    }
    
                    return null;
                }
    
    
                @Override
                public void setRowIndex(int rowIndex) {
                    /*
                     * The following is in ancestor (LazyDataModel):
                     * this.rowIndex = rowIndex == -1 ? rowIndex : (rowIndex % pageSize);
                     */
                    if (rowIndex == -1 || getPageSize() == 0) {
                        super.setRowIndex(-1);
                    }
                    else
                        super.setRowIndex(rowIndex % getPageSize());
                }
    
            };
        }

my listagem.xhtml

?xml version="1.0" encoding="ISO-8859-1" ?>
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    
    <html xmlns="http://www.w3.org/1999/xhtml"  
        xmlns:h="http://java.sun.com/jsf/html"  
        xmlns:f="http://java.sun.com/jsf/core"  
        xmlns:p="http://primefaces.org/ui"
        xmlns:ui="http://java.sun.com/jsf/facelets">  
    
          <h:head>
    
          </h:head> 
    
          <h:form id = "f">      
    
              <p:dataTable emptyMessage="Não tem registros." var = "funcionario" 
              value = "#{bean.getLazyDataModel()}" paginator="true" rows = "5" id = "tbf" 
              rowsPerPageTemplate="5,10,15" lazy = "true" filterEvent="enter" 
              selection="#{bean.selecionado}" selectionMode="single" rowKey="#{bean.funcionario.codigo}"
              >
    
    
                  <p:ajax event="rowSelect" update=":t:dialogf:display" oncomplete="funcionarioDialog.show()"/>
    
                  <p:column filterBy="#{funcionario.codigo}" headerText="Codigo" filterMatchMode="contains" 
                  >
                      <h:outputText value="#{funcionario.codigo}" />    
                  </p:column>    
    
                  <p:column filterBy="#{funcionario.nome}" headerText="Nome" filterMatchMode="contains">  
                      <h:outputText value="#{funcionario.nome}" />
                  </p:column>
    
                  <p:column filterBy="#{funcionario.cpf}" headerText="Cpf" filterMatchMode="contains">
                      <h:outputText value="#{funcionario.cpf}" />    
                  </p:column>
    
                  <p:column filterBy="#{funcionario.dataNascimento}" headerText="Data Nascimento" filterMatchMode="contains" >
                      <h:outputText value="#{funcionario.dataNascimento}" >
                          <f:convertDateTime type="date" pattern="dd/MM/yyyy" />
                      </h:outputText>    
                  </p:column>
    
                  <p:column filterBy="#{funcionario.usuario}" headerText="Usuario" filterMatchMode="contains">
                      <h:outputText value="#{funcionario.usuario}" />    
                  </p:column>
    
                  <p:column headerText = "Excluir">
    
                      <p:commandLink action ="#{funcionarioBean.excluir()}" update = "tbf" >
                      excluir
                      <f:setPropertyActionListener target="#{funcionarioBean.funcionario}" value="#{funcionario}" />
                      </p:commandLink>
    
                  </p:column>
    
    
                  <p:column style="width:4%">  
                    <p:commandButton id="selectButton" update = ":t:dialogf:display" value = "ver"
                    oncomplete="funcionarioDialog.show()" title="View"> 
                        <f:setPropertyActionListener target="#{bean.selecionado}" value="#{funcionario}" />  
                    </p:commandButton>  
                </p:column>
    
                <p:column headerText = "Alterar">  
                    <p:commandButton id="selectButton2" update = ":t:" value = "Alterar" title="Alterar"> 
                        <f:setPropertyActionListener target="#{bean.funcionario}" value="#{funcionario}" />  
                    </p:commandButton>  
                </p:column> 
    
              </p:dataTable>          
          </h:form>
    
          <h:form id = "dialogf">
              <p:dialog id = "dialog" header = "Detalhes do Registro" widgetVar="funcionarioDialog" resizable = "false"
              showEffect="fade" hideEffect="explode">
    
                  <h:panelGrid id = "display" columns="2" cellpadding="4">
    
                      <h:outputText value="Codigo:" />  
                       <h:outputText value="#{bean.selecionado.codigo}" />
    
                      <h:outputText value="Nome:" />  
                       <h:outputText value="#{bean.funcionario.nome}" />
    
                       <h:outputText value="Cpf:" />  
                       <h:outputText value="#{bean.funcionario.cpf}" /> 
    
                       <h:outputText value="Data Nascimento:" />  
                       <h:outputText value="#{bean.funcionario.dataNascimento}" >
                           <f:convertDateTime type="date" pattern="dd/MM/yyyy" />
                       </h:outputText> 
    
                       <h:outputText value="Usuario:" />  
                       <h:outputText value="#{bean.funcionario.usuario}" /> 
    
                       <h:outputText value="Senha:" />  
                       <h:outputText value="#{bean.funcionario.senha}" /> 
    
    
                  </h:panelGrid>
    
              </p:dialog>
          </h:form>
    
    
    </html>

when I select any of a given table

it returns me the following error

Set 04, 2013 9:40:56 AM com.sun.faces.context.PartialViewContextImpl processPartial
    INFO: java.lang.NullPointerException
    java.lang.NullPointerException
        at org.primefaces.component.datatable.DataTable.getRowData(DataTable.java:936)
        at org.primefaces.component.datatable.feature.SelectionFeature.decodeSingleSelection(SelectionFeature.java:47)
        at org.primefaces.component.datatable.feature.SelectionFeature.decode(SelectionFeature.java:38)
        at org.primefaces.component.datatable.DataTableRenderer.decode(DataTableRenderer.java:57)
        at javax.faces.component.UIComponentBase.decode(UIComponentBase.java:787)
        at org.primefaces.component.api.UIData.processDecodes(UIData.java:228)
        at com.sun.faces.context.PartialViewContextImpl$PhaseAwareVisitCallback.visit(PartialViewContextImpl.java:506)
        at com.sun.faces.component.visit.PartialVisitContext.invokeVisitCallback(PartialVisitContext.java:183)
        at org.primefaces.component.api.UIData.visitTree(UIData.java:639)
        at javax.faces.component.UIComponent.visitTree(UIComponent.java:1600)
        at javax.faces.component.UIForm.visitTree(UIForm.java:344)
        at javax.faces.component.UIComponent.visitTree(UIComponent.java:1600)
        at org.primefaces.component.tabview.TabView.visitTree(TabView.java:419)
        at javax.faces.component.UIComponent.visitTree(UIComponent.java:1600)
        at javax.faces.component.UIComponent.visitTree(UIComponent.java:1600)
        at com.sun.faces.context.PartialViewContextImpl.processComponents(PartialViewContextImpl.java:376)
        at com.sun.faces.context.PartialViewContextImpl.processPartial(PartialViewContextImpl.java:252)
        at javax.faces.context.PartialViewContextWrapper.processPartial(PartialViewContextWrapper.java:183)
        at javax.faces.component.UIViewRoot.processDecodes(UIViewRoot.java:931)
        at com.sun.faces.lifecycle.ApplyRequestValuesPhase.execute(ApplyRequestValuesPhase.java:78)
        at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
        at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
        at javax.faces.webapp.FacesServlet.service(FacesServlet.java:409)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
        at org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter.doFilterInternal(OpenEntityManagerInViewFilter.java:178)
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:108)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
        at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
        at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
        at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
        at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)

someone help?
I used primefaces 3.5

jsf 2.1

Tim Holloway

Saloon Keeper

Posts: 25477

180

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posted 8 years ago

Number of slices to send:

Optional 'thank-you' note:

Send

Always try to minimize the amount of example code you post. One of the downsides of getting free help is that when you post something that overflows the screen, it's a lot harder for us to get motivated to wade through it.

I think your problem is here:

EL is not intended as a programming language. Programming should be done on the Model, not on the View. In particular, read/write property references, such as those made by "value=" are unsuited for programmatic access, since Java doesn't return references to objects, it returns objects, and a method call is effectively only going to read and not write.

So try this instead:

>

Sometimes the only way things ever got fixed is because people became uncomfortable.

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