Annotation Type Init

  • @Target({METHOD,TYPE})
    public @interface Init

    Marker annotation to identify a initial method.
    Only one (could be zero) initial method is allowed in a particular class. If you want binder to call super calss's initial method also, you have to set superclass() to true, and super class's initial method will be called first. You could annotate it on the type if the class doesn't has a init method but super-class has.

    For example, in class hierarchy A(has @Init) <- B(has @Init, superclass true) <- C(no @Init) <- D (has @Init, superclass false). D is the last one.
    If D is the view model, will call D.init only
    If C is the view model, no method will be called
    If B is the view model, will call A.init then B.init
    If A is the view model, will call A.init

    Exception: if superclass() was been set to true and your initial method is an overridden method to it's super's initial method, ex:
    X.m1() <- Y.m1()
    Binder will throw an exception due to the conflict of java language's overriding nature.

    Parameter Binding, for convenience, initial method support several kinds of Parameter Annotations. Binder will weave it's context(Zul page annotation, Java EE Context) with method's parameters while invocation.
    For example, you can wire @init('BlaBlaVM', a='b') to an initial method like:
    @Init public void doInit(@BindingParam("a") String a)

    See Also:
    BindingParam, ExecutionParam, ExecutionArgParam, HeaderParam, CookieParam, QueryParam, ScopeParam, ContextParam, Default, AfterCompose
    • Optional Element Summary

      Optional Elements 
      Modifier and Type Optional Element Description
      boolean superclass  
    • Element Detail

      • superclass

        boolean superclass