Primefaces team.
I chose primefaces for a reason over Richfaces. The primefaces approach was easy to understand and compact for some of the functionalities and component implementation.
I am not sure if the primefaces showcase for 3.0 examples are intentially incomplete or a mistake for missing parts of the code, but it seems like every example I try, I run into issues.
One example I am trying to implement is the Datatable Checkbox selection my post unanswered (viewtopic.php?f=3&t=15853)
or
the single rowselection below
I keep running into nullpointer exceptions.
I am using 3.0.M3 AND TOMCAT 6.
Example site
http://www.primefaces.org/showcase-labs ... nstant.jsf
error
Code: Select all
Caused by: java.lang.NullPointerException
at com.jpmc.cisd.TableBean.onRowSelect(TableBean.java:119)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.el.parser.AstValue.invoke(AstValue.java:191)
... 23 more
Code: Select all
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
import java.util.UUID;
import javax.enterprise.context.SessionScoped;
import javax.faces.application.FacesMessage;
import javax.faces.bean.ManagedBean;
import javax.faces.context.FacesContext;
import org.primefaces.event.SelectEvent;
import org.primefaces.event.UnselectEvent;
@ManagedBean
@SessionScoped
public class TableBean implements Serializable {
/**
*
*/
private static final long serialVersionUID = -6839748907567487131L;
private final static String[] colors;
private final static String[] manufacturers;
static {
colors = new String[10];
colors[0] = "Black";
colors[1] = "White";
colors[2] = "Green";
colors[3] = "Red";
colors[4] = "Blue";
colors[5] = "Orange";
colors[6] = "Silver";
colors[7] = "Yellow";
colors[8] = "Brown";
colors[9] = "Maroon";
manufacturers = new String[10];
manufacturers[0] = "Mercedes";
manufacturers[1] = "BMW";
manufacturers[2] = "Volvo";
manufacturers[3] = "Audi";
manufacturers[4] = "Renault";
manufacturers[5] = "Opel";
manufacturers[6] = "Volkswagen";
manufacturers[7] = "Chrysler";
manufacturers[8] = "Ferrari";
manufacturers[9] = "Ford";
}
private List<Car> cars;
private Car selectedCar;
private Car[] selectedCars;
private CarDataModel mediumCarsModel;
public TableBean() {
cars = new ArrayList<Car>();
populateRandomCars(cars, 500);
mediumCarsModel = new CarDataModel(cars);
}
public Car[] getSelectedCars() {
return selectedCars;
}
public void setSelectedCars(Car[] selectedCars) {
this.selectedCars = selectedCars;
}
public Car getSelectedCar() {
if (selectedCar != null)
System.out.println("Selected Car is...: " + selectedCar);
return selectedCar;
}
public void setSelectedCar(Car selectedCar) {
this.selectedCar = selectedCar;
}
private void populateRandomCars(List<Car> list, int size) {
for (int i = 0; i < size; i++)
list.add(new Car(getRandomModel(), getRandomYear(),
getRandomManufacturer(), getRandomColor()));
}
private int getRandomYear() {
return (int) (Math.random() * 50 + 1960);
}
private String getRandomColor() {
return colors[(int) (Math.random() * 10)];
}
private String getRandomManufacturer() {
return manufacturers[(int) (Math.random() * 10)];
}
private String getRandomModel() {
return UUID.randomUUID().toString().substring(0, 8);
}
public CarDataModel getMediumCarsModel() {
return mediumCarsModel;
}
public void onRowSelect(SelectEvent event) {
FacesMessage msg = new FacesMessage("Car Selected",
((Car) event.getObject()).getModel());
FacesContext.getCurrentInstance().addMessage(null, msg);
}
public void onRowUnselect(UnselectEvent event) {
FacesMessage msg = new FacesMessage("Car Unselected",
((Car) event.getObject()).getModel());
FacesContext.getCurrentInstance().addMessage(null, msg);
}
public String onRowSelectNavigate(SelectEvent event) {
FacesContext.getCurrentInstance().getExternalContext().getFlash()
.put("selectedCar", event.getObject());
return "carDetail?faces-redirect=true";
}
}
Code: Select all
<html xmlns="http://www.w3c.org/1999/xhtml"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:p="http://primefaces.prime.com.tr/ui">
<h:head>
</h:head>
<h:body>
<h:form id="form">
<p:growl id="growl" showDetail="true"/>
<p:dataTable var="car" value="#{tableBean.mediumCarsModel}" paginator="true" rows="10" selection="#{tableBean.selectedCar}" selectionMode="single">
<p:ajax event="rowSelect" listener="#{tableBean.onRowSelect}" update=":form:display :form:growl" oncomplete="carDialog.show()"/>
<p:ajax event="rowUnselect" listener="#{tableBean.onRowUnselect}" update=":form:growl"/>
<f:facet name="header">
Select a row to display a message
</f:facet>
<p:column headerText="Model">
#{car.model}
</p:column>
<p:column headerText="Year">
#{car.year}
</p:column>
<p:column headerText="Manufacturer" >
#{car.manufacturer}
</p:column>
<p:column headerText="Color">
#{car.color}
</p:column>
</p:dataTable>
<p:dialog header="Car Detail" widgetVar="carDialog" resizable="false" showEffect="explode" hideEffect="explode">
<h:panelGrid id="display" columns="2" cellpadding="4">
<f:facet name="header">
<p:graphicImage value="/images/cars/#{tableBean.selectedCar.manufacturer}.jpg"/>
</f:facet>
<h:outputText value="Model:" />
<h:outputText value="#{tableBean.selectedCar.model}" />
<h:outputText value="Year:" />
<h:outputText value="#{tableBean.selectedCar.year}" />
<h:outputText value="Manufacturer:" />
<h:outputText value="#{tableBean.selectedCar.manufacturer}" />
<h:outputText value="Color:" />
<h:outputText value="#{tableBean.selectedCar.color}" />
</h:panelGrid>
</p:dialog>
</h:form>
</h:body>
</html>
Please help.
Thanks