Examples of javax.faces.application.NavigationHandler

javax.faces.application.NavigationHandler

A NavigationHandler is passed the outcome string returned by an application action invoked for this application, and will use this (along with related state information) to choose the view to be displayed next.

A default implementation of NavigationHandler must be provided by the JSF implementation, which will be utilized unless setNavigationHandler() is called to establish a different one. This default instance will compare the view identifier of the current view, the specified action binding, and the specified outcome against any navigation rules provided in faces-config.xml file(s). If a navigation case matches, the current view will be changed by a call to FacesContext.setViewRoot(). Note that a null outcome value will never match any navigation rule, so it can be used as an indicator that the current view should be redisplayed.

        if (command != null)
        {
            try
            {
                facesContext.getAttributes().put(ViewPoolProcessor.DISPOSE_VIEW_NAVIGATION, Boolean.TRUE);
                NavigationHandler navigationHandler = facesContext.getApplication().getNavigationHandler();
                if (command.length == 3)
                {
                    navigationHandler.handleNavigation(facesContext, (String) command[0], (String) command[1], 
                        (String) command[2]);
                }
                else
                {
                    navigationHandler.handleNavigation(facesContext, (String) command[0], (String) command[1]);
                }
                //Render Response if needed
                facesContext.renderResponse();
                facesContext.getAttributes().remove(ViewPoolProcessor.INVOKE_DEFERRED_NAVIGATION);
            }

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        String outcome = component.getOutcome();
        outcome = (outcome == null) ? facesContext.getViewRoot().getViewId()
                : outcome;
        outcome = ((outcome == null) ? HtmlRendererUtils.STR_EMPTY : outcome.trim());
        // Get the correct URL for the outcome.
        NavigationHandler nh = facesContext.getApplication().getNavigationHandler();
        if (!(nh instanceof ConfigurableNavigationHandler))
        {
            throw new FacesException(
                    "Navigation handler must be an instance of "
                            + "ConfigurableNavigationHandler for using h:link or h:button");

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            Throwable t = context.getException();
            if (t instanceof ViewExpiredException) {
                ViewExpiredException vee = (ViewExpiredException) t;
                FacesContext facesContext = FacesContext.getCurrentInstance();
                Map<String, Object> requestMap = facesContext.getExternalContext().getRequestMap();
                NavigationHandler navigationHandler = facesContext.getApplication().getNavigationHandler();
                try {
                    // Push some useful stuff to the request scope for use in the page
                    requestMap.put("currentViewId", vee.getViewId());
                    navigationHandler.handleNavigation(facesContext, null, "/viewExpired");
                    facesContext.renderResponse();
                } finally {
                    i.remove();
                }
            }

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            Throwable t = context.getException();
            if (t instanceof ViewExpiredException) {
                ViewExpiredException vee = (ViewExpiredException) t;
                FacesContext facesContext = FacesContext.getCurrentInstance();
                Map<String, Object> requestMap = facesContext.getExternalContext().getRequestMap();
                NavigationHandler navigationHandler = facesContext.getApplication().getNavigationHandler();
                try {
                    // Push some useful stuff to the request scope for use in the page
                    requestMap.put("currentViewId", vee.getViewId());
                    navigationHandler.handleNavigation(facesContext, null, "/viewExpired");
                    facesContext.renderResponse();
                } finally {
                    i.remove();
                }
            }

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            Throwable t = context.getException();
            if (t instanceof ViewExpiredException) {
                ViewExpiredException vee = (ViewExpiredException) t;
                FacesContext facesContext = FacesContext.getCurrentInstance();
                Map<String, Object> requestMap = facesContext.getExternalContext().getRequestMap();
                NavigationHandler navigationHandler = facesContext.getApplication().getNavigationHandler();
                try {
                    // Push some useful stuff to the request scope for use in the page
                    requestMap.put("currentViewId", vee.getViewId());
                    navigationHandler.handleNavigation(facesContext, null, "/viewExpired");
                    facesContext.renderResponse();
                } finally {
                    i.remove();
                }
            }

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      return;
    }
    if (LOG.isDebugEnabled()) {
      LOG.debug("outcome = '" + outcome + "'");
    }
    NavigationHandler navigationHandler = application.getNavigationHandler();
    navigationHandler.handleNavigation(facesContext, null, outcome);
    lifecycle.render(facesContext);
  }

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        String outcome = component.getOutcome();
        outcome = (outcome == null) ? facesContext.getViewRoot().getViewId()
                : outcome;
        outcome = ((outcome == null) ? STR_EMPTY : outcome.trim());
        // Get the correct URL for the outcome.
        NavigationHandler nh = facesContext.getApplication().getNavigationHandler();
        if (!(nh instanceof ConfigurableNavigationHandler))
        {
            throw new FacesException(
                    "Navigation handler must be an instance of "
                            + "ConfigurableNavigationHandler for using h:link or h:button");

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        String viewId = getFromViewId();
        UIViewRoot view = viewHandler.createView(facesContext, viewId);
        facesContext.setViewRoot(view);
      }


      NavigationHandler navigationHandler = application.getNavigationHandler();
      navigationHandler.handleNavigation(facesContext, null, outcome);


      lifecycle.render(facesContext);
    } finally {
      facesContext.release();
    }

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            {
                throw new FacesException("Error calling action method of component with id " + actionEvent.getComponent().getClientId(facesContext), e);
            }
        }


        NavigationHandler navigationHandler = application.getNavigationHandler();
        navigationHandler.handleNavigation(facesContext,
                                           fromAction,
                                           outcome);
        //Render Response if needed
        facesContext.renderResponse();

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        String outcome = component.getOutcome();
        outcome = (outcome == null) ? facesContext.getViewRoot().getViewId()
                : outcome;
        outcome = ((outcome == null) ? HtmlRendererUtils.STR_EMPTY : outcome.trim());
        // Get the correct URL for the outcome.
        NavigationHandler nh = facesContext.getApplication().getNavigationHandler();
        if (!(nh instanceof ConfigurableNavigationHandler))
        {
            throw new FacesException(
                    "Navigation handler must be an instance of "
                            + "ConfigurableNavigationHandler for using h:link or h:button");

View Full Code Here

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