src/main/java/eu/etaxonomy/vaadin/mvp/AbstractPresenter.java

   1 package eu.etaxonomy.vaadin.mvp;
   2
   3 import java.util.logging.Logger;
   4
   5 import org.springframework.beans.factory.annotation.Autowired;
   6 import org.springframework.beans.factory.annotation.Qualifier;
   7
   8 import com.vaadin.spring.annotation.SpringComponent;
   9 import com.vaadin.spring.annotation.ViewScope;
  10
  11 import eu.etaxonomy.cdm.api.application.CdmRepository;
  12
  13 /**
  14  * AbstractPresenter is the base class of all presenter components. Presenter's
  15  * role is to govern the view and control the complex UI logic based on
  16  * notifications presenter receives from its view.
  17  *
  18  * @author Peter / Vaadin
  19  *
  20  * @param <V>
  21  *            type of the view this presenter governs
  22  */
  23 @SpringComponent
  24 @ViewScope
  25 public abstract class AbstractPresenter<V extends ApplicationView> {
  26
  27         private V view;
  28
  29
  30         protected V getView() {
  31                 return view;
  32         }
  33
  34         @Autowired
  35         @Qualifier("cdmRepository")
  36         private CdmRepository repo;
  37
  38         /**
  39          * @return the repo
  40          */
  41         public CdmRepository getRepo() {
  42             return repo;
  43         }
  44
  45         /**
  46          * Notifies the presenter that its view is initialized so that presenter can
  47          * start its own initialization if required.
  48          *
  49          * @param view
  50          */
  51         protected final void init(V view) {
  52                 Logger.getLogger(getClass().getName()).info("Presenter init");
  53                 this.view = view;
  54                 onPresenterReady();
  55         }
  56
  57         /**
  58          * Extending classes should overwrite this method in order to perform logic
  59          * after presenter has finished initializing.
  60          */
  61         protected void onPresenterReady() {
  62                 Logger.getLogger(getClass().getName()).info("Presenter ready");
  63         }
  64
  65         /**
  66          * Extending classes should overwrite this method to react to the event when
  67          * user has navigated into the view that this presenter governs.
  68          */
  69         public void onViewEnter() {
  70                 Logger.getLogger(getClass().getName()).info("View entered");
  71         }
  72
  73         public void onViewExit() {
  74
  75         }
  76
  77 }