Examples of javax.faces.render.ResponseStateManager

javax.faces.render.ResponseStateManager
sun.com/j2ee/javaserverfaces/1.1_01/docs/api/index.html">JSF Specification @author Manfred Geiler (latest modification by $Author: dennisbyrne $) @version $Revision: 413563 $ $Date: 2006-06-11 19:25:41 -0700 (Sun, 11 Jun 2006) $

        //===========================================
        // first, locate the saved state information
        //===========================================


        RenderKit renderKit = getRenderKitFactory().getRenderKit(facesContext, renderKitId);
        ResponseStateManager responseStateManager = renderKit.getResponseStateManager();


        Object serializedComponentStates;
        if (isSavingStateInClient(facesContext))
        {
            if (isLegacyResponseStateManager(responseStateManager))
            {
                serializedComponentStates = responseStateManager.getComponentStateToRestore(facesContext);
            }
            else
            {
                serializedComponentStates = responseStateManager.getState(facesContext, uiViewRoot.getViewId());
            }
            if (serializedComponentStates == null)
            {
                log.severe("No serialized component state found in client request!");
                // mark UIViewRoot invalid by resetting view id
                uiViewRoot.setViewId(null);
                return;
            }
        }
        else
        {
            Integer serverStateId = getServerStateId((Object[]) responseStateManager.getState(facesContext, uiViewRoot.getViewId()));


            Object[] stateObj = (Object[])( (serverStateId == null)? null : getSerializedViewFromServletSession(facesContext, uiViewRoot.getViewId(), serverStateId) );
            if (stateObj == null)
            {
                 log.severe("No serialized view found in server session!");

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                                              String renderKitId)
    {
        if (log.isLoggable(Level.FINEST)) log.finest("Entering restoreTreeStructure");


        RenderKit rk = getRenderKitFactory().getRenderKit(facesContext, renderKitId);
        ResponseStateManager responseStateManager = rk.getResponseStateManager();


        UIViewRoot uiViewRoot;
        if (isSavingStateInClient(facesContext))
        {
            //reconstruct tree structure from request
            Object treeStructure = responseStateManager.getTreeStructureToRestore(facesContext, viewId);
            if (treeStructure == null)
            {
                if (log.isLoggable(Level.FINE)) log.fine("Exiting restoreTreeStructure - No tree structure state found in client request");
                return null;
            }


            TreeStructureManager tsm = new TreeStructureManager();
            uiViewRoot = tsm.restoreTreeStructure(treeStructure);
            if (log.isLoggable(Level.FINEST)) log.finest("Tree structure restored from client request");
        }
        else
        {
            //reconstruct tree structure from ServletSession
            Integer serverStateId = getServerStateId((Object[]) responseStateManager.getState(facesContext, viewId));


            Object[] stateObj = (Object[])( (serverStateId == null)? null : getSerializedViewFromServletSession(facesContext, viewId, serverStateId) );
            if (stateObj == null)
            {
                if (log.isLoggable(Level.FINE)) log.fine("Exiting restoreTreeStructure - No serialized view found in server session!");

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            uiViewRoot = sms.restoreView(facesContext, viewId, renderKitId);
        }
        else
        {
            RenderKit renderKit = getRenderKitFactory().getRenderKit(facesContext, renderKitId);
            ResponseStateManager responseStateManager = renderKit.getResponseStateManager();


            Object state;
            if (isSavingStateInClient(facesContext))
            {
                if (log.isLoggable(Level.FINEST)) log.finest("Restoring view from client");


                state = responseStateManager.getState(facesContext, viewId);
            }
            else
            {
                if (log.isLoggable(Level.FINEST)) log.finest("Restoring view from session");


                Integer serverStateId = getServerStateId((Object[]) responseStateManager.getState(facesContext, viewId));


                state = (serverStateId == null) ? null : getSerializedViewFromServletSession(facesContext, viewId, serverStateId);
            }


            if (state != null) {

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        if (log.isLoggable(Level.FINEST)) log.finest("Entering writeState");


        UIViewRoot uiViewRoot = facesContext.getViewRoot();
        //save state in response (client)
        RenderKit renderKit = getRenderKitFactory().getRenderKit(facesContext, uiViewRoot.getRenderKitId());
        ResponseStateManager responseStateManager = renderKit.getResponseStateManager();


        if (isLegacyResponseStateManager(responseStateManager))
        {
            responseStateManager.writeState(facesContext, serializedView);
        }
        else if (!isSavingStateInClient(facesContext))
        {
            Object[] state = new Object[2];
            state[JSF_SEQUENCE_INDEX] = Integer.toString(getNextViewSequence(facesContext), Character.MAX_RADIX);
            responseStateManager.writeState(facesContext, state);
        }
        else
        {
            Object[] state = new Object[2];
            state[0] = serializedView.getStructure();
            state[1] = serializedView.getState();
            responseStateManager.writeState(facesContext, state);
        }


        if (log.isLoggable(Level.FINEST)) log.finest("Exiting writeState");


    }

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            if (log.isLoggable(Level.FINEST)) log.finest("Processing writeStateAsUrlParams - client-side state saving writing state");


            UIViewRoot uiViewRoot = facesContext.getViewRoot();
            //save state in response (client)
            RenderKit renderKit = getRenderKitFactory().getRenderKit(facesContext, uiViewRoot.getRenderKitId());
            ResponseStateManager responseStateManager = renderKit.getResponseStateManager();
            if (responseStateManager instanceof MyfacesResponseStateManager)
            {
                ((MyfacesResponseStateManager)responseStateManager).writeStateAsUrlParams(facesContext,
                                                                                          serializedView);
            }

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    @SuppressWarnings("unchecked")
    @Override
    public UIViewRoot restoreView (FacesContext context, String viewId, String renderKitId)
    {
        ResponseStateManager manager;
        Object state[];
        Map<String, Object> states;
        UIViewRoot view = null;
 
        // The value returned here is expected to be false (set by RestoreViewExecutor), but
        //we don't know if some ViewHandler wrapper could change it, so it is better to save the value.
        final boolean oldContextEventState = context.isProcessingEvents();
        // Get previous state from ResponseStateManager.
        manager = getRenderKitFactory().getRenderKit(context, renderKitId).getResponseStateManager();
        
        state = (Object[]) manager.getState(context, viewId);
        
        if (state == null)
        {
            //No state could be restored, return null causing ViewExpiredException
            return null;

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    @SuppressWarnings("unchecked")
    @Override
    public UIViewRoot restoreView (FacesContext context, String viewId, String renderKitId)
    {
        ResponseStateManager manager;
        Object state[];
        Map<String, Object> states;
        UIViewRoot view = null;
 
        // The value returned here is expected to be false (set by RestoreViewExecutor), but
        //we don't know if some ViewHandler wrapper could change it, so it is better to save the value.
        final boolean oldContextEventState = context.isProcessingEvents();
        // Get previous state from ResponseStateManager.
        manager = getRenderKitFactory().getRenderKit(context, renderKitId).getResponseStateManager();
        
        state = (Object[]) manager.getState(context, viewId);
        
        if (state == null)
        {
            //No state could be restored, return null causing ViewExpiredException
            return null;

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     * 
     */
    @Override
    protected boolean isViewStateAlreadyEncoded(FacesContext context)
    {
        ResponseStateManager responseStateManager = context.getRenderKit().getResponseStateManager();
        if (StateCacheUtils.isMyFacesResponseStateManager(responseStateManager))
        {
            if (StateCacheUtils.getMyFacesResponseStateManager(responseStateManager).isWriteStateAfterRenderViewRequired(context))
            {
                return false;

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    public boolean isPostback(FacesContext facesContext)
    {
        ViewHandler viewHandler = facesContext.getApplication().getViewHandler();
        String renderkitId = viewHandler.calculateRenderKitId(facesContext);
        ResponseStateManager rsm = getRenderKitFactory().getRenderKit(facesContext, renderkitId).getResponseStateManager();
        return rsm.isPostback(facesContext);
    }

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    @SuppressWarnings("unchecked")
    @Override
    public UIViewRoot restoreView (FacesContext context, String viewId, String renderKitId)
    {
        ResponseStateManager manager;
        Object state[];
        Map<String, Object> states;
        UIViewRoot view = null;
 
        // The value returned here is expected to be false (set by RestoreViewExecutor), but
        //we don't know if some ViewHandler wrapper could change it, so it is better to save the value.
        final boolean oldContextEventState = context.isProcessingEvents();
        // Get previous state from ResponseStateManager.
        manager = getRenderKitFactory().getRenderKit(context, renderKitId).getResponseStateManager();
        
        //state = (Object[]) getStateCache().restoreSerializedView(context, viewId, manager.getState(context, viewId));
        state = (Object[]) manager.getState(context, viewId);
        
        if (state == null)
        {
            //No state could be restored, return null causing ViewExpiredException
            return null;

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