Dúvida ao criar DataTable com seleção de linha

Assuntos Gerais
#1

Pessoal, estou tentando fazer com que a cada vez que o usuario clicar em “Visualizar”, obtenha uma janela modal com os dados correspondentes à linha, mas estou tendo um problema com o atributo “update”, por favor, me ajudem.

Esta é a exceção gerada

javax.servlet.ServletException: Cannot find component with identifier ":form:display" in view. javax.faces.webapp.FacesServlet.service(FacesServlet.java:606) br.com.estudo.filters.JPAFilter.doFilter(JPAFilter.java:33)

Esta é a minha página.

[code]<!DOCTYPE html PUBLIC “-//W3C//DTD XHTML 1.0 Transitional//EN”
“http://www.w3.org/TR/html4/loose.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:ui="http://java.sun.com/jsf/facelets"
xmlns:p=“http://primefaces.org/ui”>

<body>
<ui:composition template="…/templates/template.xhtml">
<ui:define name=“content”>

		&lt;h:form id="form"&gt;
			&lt;p:growl id="msgs" showDetail="true" /&gt;
			&lt;p:dataTable id="eventos" var="evento" value="#{eventoBean.eventos}"
				paginator="true" rows="5" paginatorPosition="bottom"&gt;

				&lt;p:column headerText="Nome do Evento" style="width:100px"&gt;
					&lt;h:outputText value="#{evento.evento}" /&gt;
				&lt;/p:column&gt;

				&lt;p:column headerText="Data do Evento" style="width:100px"&gt;
					&lt;h:outputText value="#{evento.dataEvento}"&gt;
						&lt;f:convertDateTime pattern="dd/MM/yyyy" /&gt;
					&lt;/h:outputText&gt;
				&lt;/p:column&gt;

				&lt;p:column headerText="Operações" style="width:100px"&gt;
					&lt;h:panelGrid columns="3" styleClass="actions" cellpadding="2"&gt;
						&lt;p:commandButton id="selectButton" 
							oncomplete="eventDialog.show()" icon="ui-icon-search"
							title="View"&gt;
							&lt;f:setPropertyActionListener value="#{evento}"
								target="#{eventoBean.eventoSelecionado}" /&gt;
						&lt;/p:commandButton&gt;
					&lt;/h:panelGrid&gt;
				&lt;/p:column&gt;

			&lt;/p:dataTable&gt;

			&lt;p:dialog header="Visualizar eventos" widgetVar="eventDialog"
				resizable="false" id="event" showEffect="fade" hideEffect="explode"
				width="800" minHeight="600" modal="true"&gt;
				&lt;h:form id="dialog"&gt;
					&lt;h:panelGrid id="display" columns="2" cellpadding="4"
						style="margin:0 auto;"&gt;
						&lt;h:outputText value="Evento:" /&gt;
						&lt;h:inputText value="#{eventoBean.evento.evento}" /&gt;
					&lt;/h:panelGrid&gt;
				&lt;/h:form&gt;
			&lt;/p:dialog&gt;
		&lt;/h:form&gt;
	&lt;/ui:define&gt;
&lt;/ui:composition&gt;

</body>
</html>[/code]

Este abaixo é meu ManagedBean.

[code]package br.com.managedbeans;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import javax.el.ELContext;
import javax.faces.bean.SessionScoped;
import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;
import javax.persistence.EntityManager;
import javax.servlet.http.HttpServletRequest;

import br.com.modelo.Evento;
import br.com.repository.EventoRepository;

@SessionScoped
public class EventoBean {
private Evento evento;
private List<Evento> eventos;
private List<Evento> eventocomplete;
private Evento eventoSelecionado;

public EventoBean() {
	evento = new Evento();
	eventos = new ArrayList&lt;Evento&gt;();
	eventocomplete = new ArrayList&lt;Evento&gt;();
}

public void adiciona() {
	EntityManager manager = this.getManager();
	EventoRepository repository = new EventoRepository(manager);
	if (this.evento.getId() == null) {
		repository.adiciona(this.evento);
	} else {
		repository.atualiza(this.evento);
	}
	this.evento = new Evento();
	this.evento = null;
}

public void preparaAlteracao() {
	Map&lt;String, String&gt; params = FacesContext.getCurrentInstance()
			.getExternalContext().getRequestParameterMap();
	Long id = Long.parseLong(params.get("id"));
	EntityManager manager = this.getManager();
	EventoRepository repository = new EventoRepository(manager);
	this.evento = repository.procura(id);
}

public void remove() {
	Map&lt;String, String&gt; params = FacesContext.getCurrentInstance()
			.getExternalContext().getRequestParameterMap();
	Long id = Long.parseLong(params.get("id"));
	EntityManager manager = this.getManager();
	EventoRepository repository = new EventoRepository(manager);
	repository.remove(id);
	this.evento = null;
}

public List&lt;Evento&gt; completeEvento(String query) {
	ELContext context = FacesContext.getCurrentInstance().getELContext();
	FacesContext.getCurrentInstance().getApplication().getELResolver()
			.getValue(context, null, "entityManager");
	EventoRepository repository = new EventoRepository(getManager());
	List&lt;Evento&gt; results = new ArrayList&lt;Evento&gt;();

	if (eventocomplete.isEmpty()) {
		this.eventocomplete = repository.complete();
	}
	for (Evento e : eventocomplete) {
		if (e.getEvento().startsWith(query)) {
			results.add(e);
		}
	}
	return results;
}

public List&lt;Evento&gt; getEventos() {
	ELContext context = FacesContext.getCurrentInstance().getELContext();
	FacesContext.getCurrentInstance().getApplication().getELResolver()
			.getValue(context, null, "entityManager");
	if (this.eventos.isEmpty()) {
		EventoRepository repository = new EventoRepository(getManager());
		this.eventos = repository.getLista();
	}
	return this.eventos;

}

private EntityManager getManager() {
	FacesContext fc = FacesContext.getCurrentInstance();
	ExternalContext ec = fc.getExternalContext();
	HttpServletRequest request = (HttpServletRequest) ec.getRequest();
	EntityManager manager = (EntityManager) request
			.getAttribute("EntityManager");
	return manager;

}

public Evento getEvento() {
	return evento;
}

public void setEvento(Evento evento) {
	this.evento = evento;
}

public List&lt;Evento&gt; getEventocomplete() {
	return eventocomplete;
}

public void setEventocomplete(List&lt;Evento&gt; eventocomplete) {
	this.eventocomplete = eventocomplete;
}

public Evento getEventoSelecionado() {
	return eventoSelecionado;
}

public void setEventoSelecionado(Evento eventoSelecionado) {
	this.eventoSelecionado = eventoSelecionado;
}

public void setEventos(List&lt;Evento&gt; eventos) {
	this.eventos = eventos;
}

}
[/code]

#2