public void beforePhase()

in empire-db-jsf2/src/main/java/org/apache/empire/jsf2/pages/PagePhaseListener.java [58:181]
68 lines of code
16 McCabe index (conditional complexity)

    public void beforePhase(PhaseEvent pe)
    {
        PhaseId phaseId = pe.getPhaseId();
        if (log.isTraceEnabled())
            log.trace("Processing Phase {}.", phaseId);

        FacesContext fc = pe.getFacesContext();
        UIViewRoot vr = fc.getViewRoot();
        if (vr == null)
        {
            /*
            PartialViewContext pvc = fc.getPartialViewContext(); 
            boolean ajax = pvc.isAjaxRequest();
            boolean part = pvc.isPartialRequest();
            if (!part && !ajax)
            {
                HttpServletRequest req = FacesUtils.getHttpRequest(fc);
                String reqURI = req.getRequestURI();
                log.info("No View Root for request to '"+reqURI+"' in Phase "+String.valueOf(phaseId));
            }
            */
            return;
        }

        // Get the view Id
        String viewId = vr.getViewId();
        if (viewId==null)
        {   // Error: No viewId!
            if (phaseId==PhaseId.RENDER_RESPONSE)
                FacesUtils.getWebApplication().onViewNotFound(fc, FacesUtils.getHttpRequest(fc));
            else
                log.error("No viewId provided for PagePhaseEvent in phase "+phaseId.getName());
            return;
        }
        
        // Detect view change
        Map<String, Object> sessionMap = fc.getExternalContext().getSessionMap();
        Object lastViewId = sessionMap.get(LAST_PAGE_VIEW_ID);
        if (lastViewId == null || !(((String) lastViewId).equalsIgnoreCase(viewId)))
        { // view changes
            FacesUtils.getWebApplication().onChangeView(fc, viewId);
            if (fc.getResponseComplete())
                return;
            // set view Id
            sessionMap.put(LAST_PAGE_VIEW_ID, viewId);
        }

        // Get Page Definition
        PageDefinition pageDef = PageDefinitions.getInstance().getPageFromViewId(viewId);
        if (pageDef == null)
        {   // No page definition available
            if (log.isDebugEnabled())
                log.debug("No page definition available for viewId {}.", viewId);
        }    

        // Check Request context path 
        /*
        if (viewChanged)
        {
            log.debug("Checking view context path");
            HttpServletRequest req = FacesUtils.getHttpRequest(fc);
            String reqURI = req.getRequestURI();
            viewId = pageDef.getPath();
            int vix = viewId.lastIndexOf('.');
            int rix = reqURI.lastIndexOf('.');
            if (rix<vix || !viewId.regionMatches(true, 0, reqURI, rix-vix, vix))
            {   // redirect to view page
                String ctxPath = fc.getExternalContext().getRequestContextPath();
                String pageURI = ctxPath + viewId.substring(0,vix) + ".iface";
                log.warn("Invalid RequestURI '" + reqURI + "'. Redirecting to '"+pageURI+"'.");
                FacesUtils.redirectDirectly(fc, pageURI);
                return;
            }
            // Save current viewId
        }
        */
        
        // Obtain PageBean from BeanManager
        String name = pageDef.getPageBeanName();
        Map<String, Object> viewMap = vr.getViewMap();
        Page pageBean = (Page) viewMap.get(name);
        if (pageBean == null)
        {   // Not available yet
            Class<? extends Page> pageClass = pageDef.getPageBeanClass();
            if (log.isDebugEnabled())
                log.debug("Creating page bean {} for {} in Phase {}.", new Object[] { pageClass.getName(), viewId, pe.getPhaseId() });
            // Use Bean Manager
            pageBean = (Page)FacesUtils.getManagedBean(fc, name);
            if (pageBean==null)
            {   // Create Instance ourselves
                log.warn("Unable to obtain page bean '{}' from BeanManager. Page bean probably not registered. Creating new instance but Injection might not work! ", name);
                try
                {   // Create Instance
                    pageBean = pageClass.newInstance();
                    viewMap.put(name, pageBean);
                }
                catch (Exception e)
                {
                    log.error("Error creating instance of page bean " + pageClass.getName(), e);
                    throw new InternalException(e);
                }
            }
            else if (!pageClass.isInstance(pageBean))
            {   // Wrong class
                log.warn("Page bean '"+name+"' is not an instance of class {} as expected. Detected class is {}", pageClass.getName(), pageBean.getClass().getName());
            }
            // Add 'page' to map 
            viewMap.put("page", pageBean);
        }
        // set definition
        pageBean.setPageDefinition(pageDef);

        // Init PageBean
        if (pe.getPhaseId() == PhaseId.RENDER_RESPONSE)
            initPageBean(pageBean, fc, viewMap);

        /*
        Collection<UIViewParameter> params = ViewMetadata.getViewParameters(vr);
        for (UIViewParameter p : params)
        {
            log.info("p {} = {}", p.getName(), p.getValue());
        }
        */
    }