A First Look at the Wicket Framework

All I had to do to bind the properties in the PizzaModel class to the fields in the HTML form was to add following line of code in the PizzaForm class:

setModel(new CompoundPropertyModel(pizzaModel));

Something that wasn't clear from the Wicket examples was how to populate the field in the Model object mapping to a drop down component in the html file. Here is what I had to do to make it work:
I had to write a new Model class to model the options in the drop down, for the test application, I wrote a new class called CrustType:

  
public class CrustType implements Serializable
{
  String id;
  String text;
  
  public CrustType()
  {
    super();
  }
  
  public CrustType(String crustName)
  {
    setId(crustName);
    setText(crustName);
  }
  public String getId()
  {
    return id;
  }
  public void setId(String id)
  {
    this.id = id;
  }
  public String getText()
  {
    return text;
  }
  public void setText(String value)
  {
    this.text = value;
  }
  @Override
  public String toString()
  {
    return getText();
  }
}
  
  

public DropDownChoice(java.lang.String id,
                      IModel model,
                      IModel choices,
                      IChoiceRenderer renderer)

    crustDropDown = new DropDownChoice(
        "crust",new PropertyModel(pizzaModel, "crust"), Arrays
        .asList(new CrustType[]
                              { new CrustType("Thin & Crispy"), 
                                new CrustType("Hand Tossed"),
                                new CrustType("Pan Pizza") }), 
                                new ChoiceRenderer("text", "id"));

After I figured out how to populate the crust property of the PizzaModel, the last step was to display a confirmation page displaying all the user entered values.