Primefaces + DataTable com selection

<p:dataTable id="cars" var="car" value="#{tableBean.mediumCarsModel}" paginator="true" rows="10"  
					                 selection="#{tableBean.selectedCar}" selectionMode="single">  
					  
					        <p:ajax event="rowSelect" listener="#{tableBean.onRowSelect}"   
					                    oncomplete="carDialog.show()" />  
					        <p:ajax event="rowUnselect" listener="#{tableBean.onRowUnselect}" />
					  
					        <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 id="dialog" header="Car Detail" widgetVar="carDialog" resizable="false"  
              width="200" showEffect="clip" hideEffect="fold">  
  
        <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>

import java.util.List;  
import javax.faces.model.ListDataModel;  
import org.primefaces.model.SelectableDataModel;  
  
public class CarDataModel extends ListDataModel<Car> implements SelectableDataModel<Car> {    
  
    public CarDataModel() {  
    }  
  
    public CarDataModel(List<Car> data) {  
        super(data);  
    }  
      
    @Override  
    public Car getRowData(String rowKey) {  
        //In a real app, a more efficient way like a query by rowKey should be implemented to deal with huge data  
          
        List<Car> cars = (List<Car>) getWrappedData();  
          
        for(Car car : cars) {  
            if(car.getModel().equals(rowKey))  
                return car;  
        }  
          
        return null;  
    }  
  
    @Override  
    public Object getRowKey(Car car) {  
        return car.getModel();  
    }  
}

import java.io.Serializable;  
import java.util.ArrayList;  
import java.util.Date;  
import java.util.List;  
import java.util.UUID;  
import java.util.logging.Logger;

import javax.faces.application.FacesMessage;
import javax.faces.bean.ApplicationScoped;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;
import javax.faces.bean.ViewScoped;
import javax.faces.context.FacesContext;
  
import org.primefaces.event.SelectEvent;  
import org.primefaces.event.UnselectEvent;  

@ManagedBean
@SessionScoped
public class TableBean {  
  
	private final static Logger logger = Logger.getLogger(TableBean.class.getName());
    
    private 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> carsSmall;  
      
    private Car selectedCar;  
  
    private CarDataModel mediumCarsModel;  
  
    public TableBean() {  
        carsSmall = new ArrayList<Car>();  
          
        populateRandomCars(carsSmall, 50);  
  
        mediumCarsModel = new CarDataModel(carsSmall);  
    }  
  
    private void populateRandomCars(List<Car> list, int size) {  
        for(int i = 0 ; i < size ; i++)  
            list.add(new Car(getRandomModel(), getRandomYear(), getRandomManufacturer(), getRandomColor()));  
    }  
  
    public Car getSelectedCar() {  
        return selectedCar;  
    }  
    public void setSelectedCar(Car selectedCar, SelectEvent event) {
    	selectedCar = (Car) event.getObject();
        this.selectedCar = selectedCar;  
    }  
  
    public CarDataModel getMediumCarsModel() {  
        return mediumCarsModel;  
    }  
  
    public void onRowSelect(SelectEvent event) {  
        FacesMessage msg = new FacesMessage("Car Selected", ((Car) event.getObject()).getModel());  
        selectedCar = (Car) event.getObject();
        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);  
    }
    
    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 int getRandomSale() {
        return (int) (Math.random() * 100000);
}

private int getRandomProfit() {
        return (int) (Math.random() * 100);
}

private String getRandomModel() {
        return UUID.randomUUID().toString().substring(0, 8);
}
}

public void setSelectedCar(Car selectedCar, SelectEvent event) {
    	selectedCar = (Car) event.getObject();
        this.selectedCar = selectedCar;  
    }