java.lang.ClassCastException: cannot be cast to java.util.List - jsf

Question

I have two classes that there is a relationship # OneToMany (Pay and Split) the code below:
#Entity
#Table(name="pagamento")
public class Pagamento implements Serializable { //Class Pay
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name="idpagamento")
private int id;
...
#ManyToOne()
#JoinColumn(name="idconta")
private Divida coddivida;
and below class Split
#Entity
#Table(name="divida")
public class Divida implements Serializable{
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "idconta")
private int id;
...
#OneToMany(cascade=CascadeType.ALL, fetch=FetchType.EAGER, mappedBy="coddivida", targetEntity = Pagamento.class)
private List<Pagamento> pagamento;
And I search through the data code below:
public List<Divida> getDividas(){
return getCleanListOfObjects(Divida.class,"from Divida divida");
}
And I'm trying to display in a datatable is as below:
<p:dataTable id="paneluser" value="#{dividaFaces.listofDivida}" var="divida" selection="#{dividaFaces.selectedDivida}"
rowKey="#{divida.id}" selectionMode="sigle" emptyMessage="Não existe Dívida" paginator="true" rows="10">
<f:facet name="header">
Panel de Dívidas Cadastradas
</f:facet>
<p:column headerText="Descricão">
#{divida.descricao}
</p:column>
<p:column id="pagar" headerText="Tela de Pagamento">
<p:commandButton value="Pagar">
<p:ajax oncomplete="pagetela.show()" update="telapgamento"/>
</p:commandButton>
</p:column>
<f:facet name="footer">
Financé v#{sistema.VERSION}
</f:facet>
</p:dataTable>
But it is giving the error below:
Hibernate:
/*
from
Divida divida */ select
divida0_.idconta as idconta0_,
divida0_.datadeinicio as datadein2_0_,
divida0_.descricaodespesa as descrica3_0_,
divida0_.empresa as empresa0_,
divida0_.exercicio as exercicio0_,
divida0_.observacao as observacao0_,
divida0_.operacaobancaria as operacao7_0_,
divida0_.parcela as parcela0_,
divida0_.tipolancamento as tipolanc9_0_,
divida0_.vencimento as vencimento0_
from
divida divida0_
Lista de Dividas: []
Hibernate:
/*
from
Divida divida */ select
divida0_.idconta as idconta0_,
divida0_.datadeinicio as datadein2_0_,
divida0_.descricaodespesa as descrica3_0_,
divida0_.empresa as empresa0_,
divida0_.exercicio as exercicio0_,
divida0_.observacao as observacao0_,
divida0_.operacaobancaria as operacao7_0_,
divida0_.parcela as parcela0_,
divida0_.tipolancamento as tipolanc9_0_,
divida0_.vencimento as vencimento0_
from
divida divida0_
Mar 26, 2013 8:34:31 PM com.sun.faces.application.view.FaceletViewHandlingStrategy handleRenderException
SEVERE: Error Rendering View[/menu/principal.xhtml]
java.lang.ClassCastException: br.com.finance.model.Divida cannot be cast to java.util.List
at org.primefaces.component.datatable.DataTable.findSelectedRowKeys(DataTable.java:977)
at org.primefaces.component.datatable.DataTableRenderer.encodeTbody(DataTableRenderer.java:624)
at org.primefaces.component.datatable.DataTableRenderer.encodeRegularTable(DataTableRenderer.java:234)
at org.primefaces.component.datatable.DataTableRenderer.encodeMarkup(DataTableRenderer.java:196)
at org.primefaces.component.datatable.DataTableRenderer.encodeEnd(DataTableRenderer.java:82)
at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:881)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1786)
at javax.faces.render.Renderer.encodeChildren(Renderer.java:168)
at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:851)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1779)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1782)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1782)
at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:439)
at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:124)
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:120)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:594)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
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:472)
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:936)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:1852)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)
Can anyone help me?

Answer 1

You are using selectionMode="sigle". Please notice the missing 'n' in single. The exception you are encoutering here has nothing to do with Hibernate.