Olá galera, estou com um erro NullPointer na minha aplicação.
O que eu gostaria de fazer é de listar todos os fornecedores do banco e joga-los em uma SelectOneListbox.
Eis o código
<?xml version="1.0" encoding="UTF-8" ?>
<!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:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:p="http://primefaces.org/ui">
<ui:composition template="_template.xhtml">
<ui:define name="conteudo">
<h:form id="conteudo">
<p:panel header="Compra de Produto">
<h:panelGrid columns="3">
<p:selectOneListbox id="selecionaFornecedor" style="height:150px" value="#{compraProdutoBean.fornecedor}">
<f:selectItems value="#{compraProdutoBeam.listaFornecedores}" var="fornecedor" itemLabel="#{fornecedor.nome}" itemValue="#{fornecedor}"></f:selectItems>
</p:selectOneListbox>
</h:panelGrid>
</p:panel>
</h:form>
</ui:define>
</ui:composition>
</html>
ManagedBean
package com.perfaco.mb;
import java.util.ArrayList;
import java.util.List;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.RequestScoped;
import javax.faces.model.SelectItem;
import com.perfaco.dao.DAO;
import com.perfaco.modelo.Fornecedor;
@ManagedBean
@RequestScoped
public class CompraProdutoBean {
private Fornecedor fornecedor = new Fornecedor();
private List<Fornecedor> fornecedores = new ArrayList<Fornecedor>();
public List<SelectItem> listaFornecedores(){
DAO<Fornecedor> dao = new DAO<Fornecedor>(Fornecedor.class);
fornecedores = dao.listaTodos();
List<SelectItem> itens = new ArrayList<SelectItem>();
for(Fornecedor f: fornecedores){
itens.add(new SelectItem(f.getId().toString(), f.getNome()));
}
return itens;
}
public Fornecedor getFornecedor() {
return fornecedor;
}
public void setFornecedor(Fornecedor fornecedor) {
this.fornecedor = fornecedor;
}
}
Erro:
13/02/2012 14:40:13 com.sun.faces.application.view.FaceletViewHandlingStrategy handleRenderException
SEVERE: Error Rendering View[/compraProduto.xhtml]
java.lang.NullPointerException
at org.primefaces.renderkit.InputRenderer.getSelectItems(InputRenderer.java:53)
at org.primefaces.component.selectonelistbox.SelectOneListboxRenderer.encodeSelectItems(SelectOneListboxRenderer.java:110)
at org.primefaces.component.selectonelistbox.SelectOneListboxRenderer.encodeInput(SelectOneListboxRenderer.java:94)
at org.primefaces.component.selectonelistbox.SelectOneListboxRenderer.encodeMarkup(SelectOneListboxRenderer.java:58)
at org.primefaces.component.selectonelistbox.SelectOneListboxRenderer.encodeEnd(SelectOneListboxRenderer.java:40)
at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:875)
at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeRecursive(HtmlBasicRenderer.java:312)
at com.sun.faces.renderkit.html_basic.GridRenderer.renderRow(GridRenderer.java:185)
at com.sun.faces.renderkit.html_basic.GridRenderer.encodeChildren(GridRenderer.java:129)
at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:845)
at org.primefaces.renderkit.CoreRenderer.renderChild(CoreRenderer.java:58)
at org.primefaces.renderkit.CoreRenderer.renderChildren(CoreRenderer.java:46)
at org.primefaces.component.panel.PanelRenderer.encodeContent(PanelRenderer.java:185)
at org.primefaces.component.panel.PanelRenderer.encodeMarkup(PanelRenderer.java:108)
at org.primefaces.component.panel.PanelRenderer.encodeEnd(PanelRenderer.java:55)
at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:875)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1764)
at javax.faces.render.Renderer.encodeChildren(Renderer.java:168)
at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:845)
at org.primefaces.renderkit.CoreRenderer.renderChild(CoreRenderer.java:58)
at org.primefaces.renderkit.CoreRenderer.renderChildren(CoreRenderer.java:46)
at org.primefaces.component.layout.LayoutUnitRenderer.encodeEnd(LayoutUnitRenderer.java:51)
at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:875)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1764)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1760)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1760)
at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:402)
at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:131)
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:121)
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:224)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)
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:987)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:579)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:307)
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:679)
13/02/2012 14:40:13 org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [Faces Servlet] in context with path [/perfaco-web] threw exception [null] with root cause
java.lang.NullPointerException
at org.primefaces.renderkit.InputRenderer.getSelectItems(InputRenderer.java:53)
at org.primefaces.component.selectonelistbox.SelectOneListboxRenderer.encodeSelectItems(SelectOneListboxRenderer.java:110)
at org.primefaces.component.selectonelistbox.SelectOneListboxRenderer.encodeInput(SelectOneListboxRenderer.java:94)
at org.primefaces.component.selectonelistbox.SelectOneListboxRenderer.encodeMarkup(SelectOneListboxRenderer.java:58)
at org.primefaces.component.selectonelistbox.SelectOneListboxRenderer.encodeEnd(SelectOneListboxRenderer.java:40)
at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:875)
at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeRecursive(HtmlBasicRenderer.java:312)
at com.sun.faces.renderkit.html_basic.GridRenderer.renderRow(GridRenderer.java:185)
at com.sun.faces.renderkit.html_basic.GridRenderer.encodeChildren(GridRenderer.java:129)
at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:845)
at org.primefaces.renderkit.CoreRenderer.renderChild(CoreRenderer.java:58)
at org.primefaces.renderkit.CoreRenderer.renderChildren(CoreRenderer.java:46)
at org.primefaces.component.panel.PanelRenderer.encodeContent(PanelRenderer.java:185)
at org.primefaces.component.panel.PanelRenderer.encodeMarkup(PanelRenderer.java:108)
at org.primefaces.component.panel.PanelRenderer.encodeEnd(PanelRenderer.java:55)
at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:875)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1764)
at javax.faces.render.Renderer.encodeChildren(Renderer.java:168)
at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:845)
at org.primefaces.renderkit.CoreRenderer.renderChild(CoreRenderer.java:58)
at org.primefaces.renderkit.CoreRenderer.renderChildren(CoreRenderer.java:46)
at org.primefaces.component.layout.LayoutUnitRenderer.encodeEnd(LayoutUnitRenderer.java:51)
at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:875)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1764)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1760)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1760)
at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:402)
at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:131)
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:121)
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:224)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)
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:987)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:579)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:307)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:679)
Obrigado pela ajuda de todos