Wicket Next (1.4/1.5)
- 1. Wicket NEXT Johan Compagner
- 2. Who is Johan Compagner Senior Java Developer at Servoy 10+ years of Java experience Swing and the Web (Struts/Tapestry) Core Wicket developer since September 2004
- 3. Agenda Wicket 1.4 (GENERICS!!) Wicket 1.5 (or 2.0) Q&A
- 4. Wicket 1.4 Generics Model<T> Component<T> MetaData<T>
- 5. Model<T> class IModel<T> { T getObject() void setObject(T) } Model<String> model = new Model<String>(“Wicket”); String str = model.getObject(); // no cast.
- 6. Component<T> Why the need to generify Component? IModel parameter in constructor. public Component(String id, IModel<T> model) set/getModel() methods public Component<T> setModel(IModel<T> model) public final IModel<T> getModel() getModelObject() public final T getModelObject()
- 7. Component<T> TextField<Double> tf = new TextField<Double>(“txt”,Double.class) Double.class still needed for converter.. Also makes it more clear what components really want like ListView: ListView<T> extends AbstractRepeater<List<T>> public ListView(String id, IModel<List<T>> model) And my personal favorite: public DropDownChoice(String id,IModel<T> model, IModel<List<T>> choices, IChoiceRenderer<T> renderer) public ListMultipleChoice(String id, IModel<Collection<T>> model, IModel<List<T>> choices, IChoiceRenderer<T> renderer)
- 8. Wicket 1.4 what more.. A little bit more generics here and there MetaData without generics: MetaDataKey PERMISSION = new MetaDataKey(Permission. class ); Permission p = (Permission)session.getMetaData(PERMISSION); With generics: MetaDataKey<Permission> PERMISSIONS = new MetaDataKey<Permission>(); Permission p = session.getMetaData(PERMISSION); Varargs.. MarkupContainer.add(Component... childs) Component.add(IBehavior... behavior) Some API breakage compared to 1.3 to fix some bugs and cleanup some API. So no drop in replacement!
- 9. Wicket 1.4, WHEN!?! NOW!!! (or almost, start commit now!) At least in svn (trunk) Or snapshot release (if bambo works out) Not a release yet in a few weeks first milestone build.
- 10. Wicket 1.5/2.0 Don't hold me responsible if some of the next mentioned features don't make it!
- 11. Inheritance Improvement Multiply extend/child area's <html><body> This is in the super markup.<wicket:child />This is in the super markup. </body></html> <html><body> This is in the child markup. <wicket:extend>This is in the child markup.</wicket:extend> This is in the child markup. </body></html> <html><body> This is in the super markup. This is in the child markup. This is in the super markup. </body></html>
- 12. Inheritance Improvement <html><body> This is in the super markup.<wicket:child name=”child1”/> This is in the super markup.<wicket:child name=”child2”/> </body></html> <html><body> This is in the child markup. <wicket:extend name=”child1”>This is in the child1 markup.</wicket:extend> This is in the child markup. <wicket:extend name=”child2”>This is in the child2 markup.</wicket:extend> </body></html> <html><body> This is in the super markup. This is in the child1 markup. This is in the super markup. This is in the child2 markup. </body></html>
- 13. Inheritance Improvement Childs can come from different sub pages. Can have multiply childs itself again.
- 14. ProxyModel A Model based on invocation recording. Generates string expressions for the existing PropertyModel SafePropertyModel<Person> p = new SafePropertyModel<Person>(new Person()); TextField field = new TextField("name", p.bind(p.toProperty().getFirstName()));
- 15. ProxyModel Generates byte code that is a Macro SafePropertyModel<Person> p = new SafePropertyModel<Person>(new Person()); TextField field = new TextField("name", p.bind(p.toProperty().getAddress().getCity())); class Macro implements IPropertyInvoker { void setObject(Object rootObject, Object value) { Address address = ((Person)rootObject).getAddress(); if (address != null) address.setCity((City)value); } Object getObject(Object rootObject) { Address address = ((Person)rootObject).getAddress(); if (address != null) return address.getCity(); return null; } Almost no state to keep, the state is a class that is shared Build on top of commons-proxy (and needs proxy/codegen classes) Most likely not in core but in a separate project.
- 16. Validators/Behaviors Validator should also be able to contribute to the markup. Class MyLengthValidator implements IContributeBehaviorValidator { void validate(IValidatable validatable) { String str = validatable.getValue(); if (str.length() > length) error(); } IBehavior getBehavior() { return SimpleAttributeModifier(“maxlength”,length); } }
- 17. Wicket 1.5/2.0 Window support (PageMap replacement) A sub session for every tab in a browser. More URL improvements So that it becomes easier to use any URL encoding for everything (stateless forms etc) CompoundAjaxBehavior More then 1 action under 1 event. Development Mode dashboard widget Combination of InspectorBug and AjaxDebug Resource/IResourceStream cleanup
- 18. Wicket Testing WicketTester improved or replaced completely. JDave/Hamcrest style testing
- 19. Wicket Security Swarm/Wasp moved to Apache
- 20. Q/A Do you guys want even more?