Class ExtensionsInvoker<A extends Action>

  • All Implemented Interfaces:
    Iterable<A>

    public class ExtensionsInvoker<A extends Action>
    extends Object
    implements Iterable<A>
    Object of this class handles a single invokation of the extensions for one or several extension points. Call Registry.useExtensions(ClientContext, ExtensionsFilter, String...) to create an invoker object. With this object you can iterate() over all actions created by the extensions, or use one of the render methods to render all actions automatically.

    The renderDefault() method uses the default render objects registered with the extension points and/or extensions (see ExtensionPoint.getRendererFactory() and Extension.getRendererFactory()). Since the registration of rendering factories are optional, the renderDefault() method only works with extensions that have done so. If an action can't be associated with a renderer, an exception is thrown.

    If there is no default rendering factory or if you want to override the default renderer, you can use the render(Renderer) method. This will force the use of the specified renderer for all extensions, ignoring all renderers set by extension points or extensions.

    Version:
    2.7
    Author:
    nicklas
    Last modified
    $Date:2008-03-20 12:15:25 +0100 (Thu, 20 Mar 2008) $
    • Method Detail

      • setClearErrors

        public void setClearErrors​(boolean clearErrors)
        Set a flag to indicate if existing errors should be cleared before an action is rendered. If this setting is not enabled (default) old errors are never cleared.
        Parameters:
        clearErrors - TRUE to clear old errors, FALSE to keep them
        Since:
        2.9
      • getNumExtensions

        public int getNumExtensions()
        Get the number of enabled extensions in this invokation. Note that this number doesn't have to correspond to the actual number of actions since an extension may choose to create 0, 1 or more actions.
        Returns:
        The number of enabled extensions
        Since:
        2.12
      • iterate

        public ActionIterator<A> iterate()
        Create an iterator that iterates over all Action:s created by the extensions. The iterator may return zero actions if none has been created.
        Returns:
        An iterator
      • renderDefault

        public void renderDefault​(WrappingRenderer<A> wrapper)
        Render all actions by wrapping the default renderers by the given wrapping renderer.
        Parameters:
        wrapper - A wrapping renderer, or null to not wrap the default renderers
        Since:
        2.12
      • renderWithEvent

        public void renderWithEvent​(Renderer<A> renderer,
                                    EventType event)
        Render all actions using a specific renderer and send the specified event to event handlers.
        Parameters:
        event - The event to send or null to not send any event
        Since:
        3.10