Erro LazyDataModel

Front-end
#1

Estou querendo excluir um item de uma linha da minha dataTable.
Só que quando tento pegar o valor da linha selecionada, gera o seguinte erro:

22:59:32,733 Advertência [javax.enterprise.resource.webcontainer.jsf.lifecycle] (http--127.0.0.1-8080-1) #{tableBean.excluir}: java.lang.ArrayIndexOutOfBoundsException: -1: javax.faces.FacesException: #{tableBean.excluir}: java.lang.ArrayIndexOutOfBoundsException: -1
	at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:118) [jsf-impl-2.1.3-b02-jbossorg-2.jar:2.1.3-SNAPSHOT]
	at javax.faces.component.UICommand.broadcast(UICommand.java:315) [jboss-jsf-api_2.1_spec-2.0.0.Beta1.jar:2.0.0.Beta1]
	at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:794) [jboss-jsf-api_2.1_spec-2.0.0.Beta1.jar:2.0.0.Beta1]
	at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1259) [jboss-jsf-api_2.1_spec-2.0.0.Beta1.jar:2.0.0.Beta1]
	at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81) [jsf-impl-2.1.3-b02-jbossorg-2.jar:2.1.3-SNAPSHOT]
	at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) [jsf-impl-2.1.3-b02-jbossorg-2.jar:2.1.3-SNAPSHOT]
	at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118) [jsf-impl-2.1.3-b02-jbossorg-2.jar:2.1.3-SNAPSHOT]
	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:593) [jboss-jsf-api_2.1_spec-2.0.0.Beta1.jar:2.0.0.Beta1]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:329) [jbossweb-7.0.1.Final.jar:7.0.2.Final]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.1.Final.jar:7.0.2.Final]
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:275) [jbossweb-7.0.1.Final.jar:7.0.2.Final]
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161) [jbossweb-7.0.1.Final.jar:7.0.2.Final]
	at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:139) [jboss-as-web-7.0.2.Final.jar:7.0.2.Final]
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:388) [jbossweb-7.0.1.Final.jar:7.0.2.Final]
	at org.jboss.as.web.NamingValve.invoke(NamingValve.java:57) [jboss-as-web-7.0.2.Final.jar:7.0.2.Final]
	at org.jboss.as.jpa.interceptor.WebNonTxEmCloserValve.invoke(WebNonTxEmCloserValve.java:49) [jboss-as-jpa-7.0.2.Final.jar:7.0.2.Final]
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:154) [jbossweb-7.0.1.Final.jar:7.0.2.Final]
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) [jbossweb-7.0.1.Final.jar:7.0.2.Final]
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) [jbossweb-7.0.1.Final.jar:7.0.2.Final]
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:362) [jbossweb-7.0.1.Final.jar:7.0.2.Final]
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:877) [jbossweb-7.0.1.Final.jar:7.0.2.Final]
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:667) [jbossweb-7.0.1.Final.jar:7.0.2.Final]
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:952) [jbossweb-7.0.1.Final.jar:7.0.2.Final]
	at java.lang.Thread.run(Thread.java:722) [:1.7.0_02]
Caused by: javax.faces.el.EvaluationException: java.lang.ArrayIndexOutOfBoundsException: -1
	at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:102) [jboss-jsf-api_2.1_spec-2.0.0.Beta1.jar:2.0.0.Beta1]
	at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102) [jsf-impl-2.1.3-b02-jbossorg-2.jar:2.1.3-SNAPSHOT]
	... 23 more
Caused by: java.lang.ArrayIndexOutOfBoundsException: -1
	at java.util.ArrayList.elementData(ArrayList.java:371) [:1.7.0_02]
	at java.util.ArrayList.get(ArrayList.java:384) [:1.7.0_02]
	at org.primefaces.model.LazyDataModel.getRowData(LazyDataModel.java:54) [primefaces-3.1.1.jar:]
	at com.teste.TableBean.excluir(TableBean.java:72) [classes:]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [:1.7.0_02]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) [:1.7.0_02]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [:1.7.0_02]
	at java.lang.reflect.Method.invoke(Method.java:601) [:1.7.0_02]
	at org.apache.el.parser.AstValue.invoke(AstValue.java:196) [jbossweb-7.0.1.Final.jar:7.0.2.Final]
	at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:276) [jbossweb-7.0.1.Final.jar:7.0.2.Final]
	at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105) [jsf-impl-2.1.3-b02-jbossorg-2.jar:2.1.3-SNAPSHOT]
	at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:88) [jboss-jsf-api_2.1_spec-2.0.0.Beta1.jar:2.0.0.Beta1]
	... 24 more

Meus arquivos são:

TableBean.java

@Component("tableBean")
@Scope(value = "session")
public class TableBean implements Serializable {

	private static final long serialVersionUID = 1L;
	private Cliente cliente;
	@Autowired
	private ClienteDAO cliDAO;
	private LazyDataModel<Cliente> clientesLazyModel;
	private List<Cliente> clientes;

	public void listar() {
		setClientes(cliDAO.listar());
		carregarDataTable();
	}

	public void excluir() {
		cliDAO.excluir(getClientesLazyModel().getRowData());
		getClientes().remove(getCliente());
		carregarDataTable();
	}

	public void carregarDataTable() {
		clientesLazyModel = new LazyDataModel<Cliente>() {

			private static final long serialVersionUID = 1L;

			@Override
			public List<Cliente> load(int first, int pageSize, String sortField,
					SortOrder sortOrder, Map<String, String> filters) {
				List<Cliente> data = new ArrayList<Cliente>();

				for (Cliente c : getClientes()) {
					boolean match = true;

					for (Iterator<String> it = filters.keySet().iterator(); it
							.hasNext();) {
						try {
							String filterProperty = it.next();
							String filterValue = filters.get(filterProperty);
							String fieldValue = String.valueOf(c.getClass()
									.getField(filterProperty).get(c));

							if (filterValue == null
									|| fieldValue.startsWith(filterValue)) {
								match = true;
							} else {
								match = false;
								break;
							}
						} catch (Exception e) {
							match = false;
						}
					}

					if (match) {
						data.add(c);
					}
				}

				int dataSize = data.size();
				this.setRowCount(dataSize);

				if (dataSize > pageSize) {
					try {
						return data.subList(first, first + pageSize);
					} catch (IndexOutOfBoundsException e) {
						return data.subList(first, first
								+ (dataSize % pageSize));
					}
				} else {
					return data;
				}
			}
		};

	}

	public LazyDataModel<Cliente> getClientesLazyModel() {
		return clientesLazyModel;
	}

	public void setClientesLazyModel(LazyDataModel<Cliente> clientesLazyModel) {
		this.clientesLazyModel = clientesLazyModel;
	}

	public List<Cliente> getClientes() {
		return clientes;
	}

	public void setClientes(List<Cliente> clientes) {
		this.clientes = clientes;
	}

	public Cliente getCliente() {
		if (cliente == null) {
			cliente = new Cliente();
		}
		return cliente;
	}

	public void setCliente(Cliente cliente) {
		this.cliente = cliente;
	}

}

index.xhtml

<p:dataTable id="dataTable" var="c"
	value="#{tableBean.clientesLazyModel}" paginator="true"
	rows="5" paginatorPosition="bottom"
	emptyMessage="Nenhum registro encontrado.">

	<p:column>
		<f:facet name="header">
			<h:outputText value="ID" />
		</f:facet>
		<h:outputText value="#{c.id}" />
	</p:column>
	<p:column>
		<f:facet name="header">
			<h:outputText value="Nome" />
		</f:facet>
		<h:outputText value="#{c.nome}" />
	</p:column>
	<p:column>
		<f:facet name="header">
			<h:outputText value="Ações" />
		</f:facet>
		<p:commandLink update=":form:confirmacaoExclusao"
			oncomplete="confirmacaoExclusao.show()">
			<h:graphicImage id="imagemExcluir" value="/imagens/excluir.png" />
			<f:setPropertyActionListener value="#{c}"
				target="#{tableBean.cliente}" />
		</p:commandLink>
		<p:tooltip for="imagemExcluir" value="Excluir" />
	</p:column>

</p:dataTable>

<p:confirmDialog id="confirmacaoExclusao"
	message="Exclusão"
	header="Deseja excluir esse registro?" severity="alert"
	widgetVar="confirmacaoExclusao">
	<center>
		<p:commandButton action="#{tableBean.excluir}"
			oncomplete="confirmacaoExclusao.hide()"
			value="Sim" update="dataTable" />
		<p:spacer width="10" />
		<p:commandButton oncomplete="confirmacaoExclusao.hide()"
			value="Não" />
	</center>
</p:confirmDialog>
#2

Se voce já está fazendo:
<f:setPropertyActionListener value="#{c}"
target="#{tableBean.cliente}" />

Pq na hora de excluir você está fazendo o abaixo?
cliDAO.excluir(getClientesLazyModel().getRowData());

Pq não ?
cliDAO.excluir(cliente);

#3

Amigo,

o que você imagina que essa linha está fazendo?

cliDAO.excluir(getClientesLazyModel().getRowData());

Você precisa sobreescrever o método getRowData();

#4

Sobrescrevi o getRowData dessa maneira:

@Override
	public T getRowData() {
		if (isRowAvailable()) {
			return super.getRowData();
		} else {
			return null;
		}
	}

Ai ele está me retornando null…O que estou fazendo de errado? Eu preciso sobrescrever o getRowKey() também? Tenho que colocar rowKey="#{c.id}" na dataTable?
Somente quero pegar o objeto que o usuário selecionou na linha da DataTable, e queria aprender a pegar utilizando os métodos do LazyDataModel.

#5

Amigo, vou postar uma classe que eu tenho para que sirva de exemplo para você…


/**
 *
 * @author faelbsr
 */
public class ClienteLazyDataModel extends LazyDataModel<PessoaCliente> {

    private PessoaClienteDao dao = new PessoaClienteDao();
    
    private PessoaEmpresa empresa;

    public ClienteLazyDataModel(PessoaEmpresa empresa) {
        this.empresa = empresa;
    }
        
    
    @Override
    public List<PessoaCliente> load(int start, int size, String sort, SortOrder so, Map<String, String> filtro) {
                
        List<PessoaCliente> toReturn;
        
        if( filtro.size() > 0 ){
        
            toReturn = dao.fetchAllLazyUsingFilter(empresa, start, size, filtro);
        
            Integer rowCount =  Integer.valueOf(dao.getCurRowCount().toString());
        
            this.setRowCount(rowCount);
            
        }else{
        
            toReturn = dao.fecthAllLazy(empresa,start,size);
            
            Integer rowCount =  Integer.valueOf(String.valueOf(dao.getMaxReg(empresa)));
        
            this.setRowCount(rowCount);
            
        }//end else                        
              
        System.out.println("CLIENTE SIZE "+ toString().length());
        
        return toReturn;
    }//end method
    
    @Override
    public Object getRowKey(PessoaCliente pessoa) {
        System.out.println("CLIENTE getrowkey "+ toString().length());
        return pessoa.getId();
    }//end method
    
    @Override
    public PessoaCliente getRowData(String rowKey) {
        System.out.println("CLIENTE getrowdata "+ toString().length());
        return dao.selectById(Integer.valueOf(rowKey));
        
    }//end method
                       
}//end class
#6