JSF Phase Event to CDI bridge

[nickarls]

Here is a quickie for JSF phase event propagation

public class PhaseEventListener implements PhaseListener {

     private BeanManager beanManager;

     private enum When {
          BEFORE, AFTER
     };

     public PhaseEventListener() {
          try {
               beanManager = (BeanManager) new InitialContext().lookup("java:app/BeanManager");
          } catch (NamingException e) {
               e.printStackTrace();
          }
     }

     @SuppressWarnings("serial")
     private void handlePhase(When when, PhaseEvent e) {
          Annotation whenAnnotation = null;
          Annotation phaseAnnotation = null;
          switch (when) {
          case BEFORE:
               whenAnnotation = new AnnotationLiteral<Before>() {
               };
               break;
          case AFTER:
               whenAnnotation = new AnnotationLiteral<After>() {
               };
               break;
          }
          if (e.getPhaseId() == PhaseId.APPLY_REQUEST_VALUES) {
               phaseAnnotation = new AnnotationLiteral<ApplyRequestValues>() {
               };
          } else if (e.getPhaseId() == PhaseId.INVOKE_APPLICATION) {
               phaseAnnotation = new AnnotationLiteral<InvokeApplication>() {
               };
          } else if (e.getPhaseId() == PhaseId.PROCESS_VALIDATIONS) {
               phaseAnnotation = new AnnotationLiteral<ProcessValidations>() {
               };
          } else if (e.getPhaseId() == PhaseId.RENDER_RESPONSE) {
               phaseAnnotation = new AnnotationLiteral<RenderResponse>() {
               };
          } else if (e.getPhaseId() == PhaseId.RESTORE_VIEW) {
               phaseAnnotation = new AnnotationLiteral<RestoreView>() {
               };
          } else if (e.getPhaseId() == PhaseId.UPDATE_MODEL_VALUES) {
               phaseAnnotation = new AnnotationLiteral<UpdateModelValues>() {
               };
          }
          beanManager.fireEvent(e, new Annotation[] { whenAnnotation,     phaseAnnotation });
     }

     public void afterPhase(PhaseEvent e) {
          handlePhase(When.AFTER, e);
     }

     public void beforePhase(PhaseEvent e) {
          handlePhase(When.BEFORE, e);
     }

     public PhaseId getPhaseId() {
          return PhaseId.ANY_PHASE;
     }

}

and the qualifiers

@Qualifier
@Target({FIELD, PARAMETER})
@Retention(RUNTIME)
public @interface Before {}

@Qualifier
@Target({FIELD, PARAMETER})
@Retention(RUNTIME)
public @interface After {}

@Qualifier
@Target({FIELD, PARAMETER})
@Retention(RUNTIME)
public @interface ApplyRequestValues {}

@Qualifier
@Target({FIELD, PARAMETER})
@Retention(RUNTIME)
public @interface InvokeApplication {}

@Qualifier
@Target({FIELD, PARAMETER})
@Retention(RUNTIME)
public @interface ProcessValidations {}

@Qualifier
@Target({FIELD, PARAMETER})
@Retention(RUNTIME)
public @interface RenderResponse {}

@Qualifier
@Target({FIELD, PARAMETER})
@Retention(RUNTIME)
public @interface RestoreView {}

@Qualifier
@Target({FIELD, PARAMETER})
@Retention(RUNTIME)
public @interface UpdateModelValues {}

Then you should be able to do

     public void jsf(@Observes @Before @RenderResponse PhaseEvent e) {
          System.out.println("before response " + e);
     }

Notes:

1. Register it yourself in faces-config


2. Use correct JNDI name for bean manager if not on JBoss 5.2+ ;-)


3. System events not included yet