O Primefaces executa diversas ações no lado do servidor, nesse conjunto do funcionalidades é possível executar javascripts dentro de ManagedBeans/Controller, segue um exemplo a seguir onde dentro de um ManagedBeans/Controller será aberto um p:dialog.
PrimeBackendController.java
package br.com.emmanuelneri.blog;
import org.primefaces.context.RequestContext;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.RequestScoped;
import javax.inject.Named;
@ManagedBean(name = "primeBackendController")
@RequestScoped
public class PrimeBackendController {
public void abrirDialog() {
RequestContext context = RequestContext.getCurrentInstance();
context.execute("dialog.show()");
}
}
- RequestContext.getCurrentInstance(): Pega o contexto do Primefaces dentro do contexto atual do JSF;
- execute: executa javascript;
primefaces-backend.xhtml
<!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:p="http://primefaces.org/ui">
<body>
<h:form id="form">
<h:commandButton value="Abrir Dialog"
actionListener="#{primeBackendController.abrirDialog}" />
<p:dialog header="Effects" widgetVar="dialog" height="100">
<h:outputText value="Dialog Aberto!" />
</p:dialog>
</h:form>
</body>
</html>
Emmanuel Neri 