PostRedirectMessagesSupport.java

package fi.otavanopisto.muikku.jsf;

import java.util.List;
import java.util.Map;

import javax.faces.application.FacesMessage;
import javax.faces.context.FacesContext;
import javax.faces.event.PhaseEvent;
import javax.faces.event.PhaseId;

import fi.otavanopisto.muikku.utils.FacesUtils;

public class PostRedirectMessagesSupport implements javax.faces.event.PhaseListener {

  private static final long serialVersionUID = -4074833216740931951L;

  @Override
  public void afterPhase(PhaseEvent event) {

  }

  @Override
  public void beforePhase(PhaseEvent event) {
    if (PhaseId.RENDER_RESPONSE.equals(event.getPhaseId())) {
      FacesContext facesContext = event.getFacesContext();

      if (!facesContext.getResponseComplete()) {

        Map<String, Object> sessionMap = facesContext.getExternalContext().getSessionMap();
        @SuppressWarnings("unchecked")
        List<FacesMessage> messages = (List<FacesMessage>) sessionMap.get(FacesUtils.POST_REDIRECT_SESSION_KEY);
        if (messages != null) {
          for (FacesMessage message : messages) {
            facesContext.addMessage(null, message);
          }

          sessionMap.remove(FacesUtils.POST_REDIRECT_SESSION_KEY);
        }
      }
    }
  }

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

}