You'd need to address backtracking and page refreshing issues as well.
On 10/4/05, Zhong Li <[EMAIL PROTECTED]> wrote:
> Hi All,
>
> I am trying to find a way to avoid saveState tag on client side, finally I
> got an idea, please give me comments regardless my thought wrong or right.
> Actually it is way to save server side data/model. We define DataSaveManager
> to manage save/remove a data in a session. When code saves data into
> session, sametime need set possible pages the data will be used, or create a
> data path rules. In phaseListener after RENDER_RESPONSE(6), we check the
> data in session, if current viewRoot isn't in possible pages list or data
> path rules list, the data will be removed automatically. Of couse, code can
> remove any data anytime. If the way works, we may find a way to do it in
> config file. We can add possiblePageList in ManageBean defination section
> and pageRuleList in Navigation Rules section.
>
> Codes looks like
>
> /**
> * @author zli
> *
> */
> public class MposPhaseListener implements PhaseListener {
>
> /* (non-Javadoc)
> * @see
> javax.faces.event.PhaseListener#afterPhase(javax.faces.event.PhaseEvent)
> */
> public void afterPhase(PhaseEvent arg0) {
>
> //System.out.println("afterPhase:"+arg0.getPhaseId());
> String viewId = arg0.getFacesContext().getViewRoot().getViewId();
> Map sessionData =
> DataSaveManager.getSessionDataMap();
> Set removeIds = new HashSet();
> if( sessionData!=null ){
> Iterator itr = sessionData.keySet().iterator();
> while( itr.hasNext() ){
> String dataId = (String)itr.next();
> SaveData saveData =
> (SaveData)sessionData.get(dataId);
> LinkedList possiblePageList =
> saveData.getPossiblePageList();
> //we check if the viewId in possible page
> if(possiblePageList!=null &&
> possiblePageList.contains(viewId) ){
> //we need keep it;
> continue;
> }
>
> LinkedList pageRuleList = saveData.getPageRuleList();
> if( pageRuleList!=null ){
> //we check and consume rules
> for( int pi = 0;pi<pageRuleList.size();pi++ ){
> //try one rule
> LinkedList rulePath =
> (LinkedList)pageRuleList.get(pi);
> if( rulePath.contains(viewId) ){
> if( viewId.equals(rulePath.get(0)) ){//cosume
> it
> rulePath.remove(0);//cosumed.
> //we need keep it;
> continue;
> }
> }
> }
> }
> //this data is useless, put in removeIds
> removeIds.add(dataId);
> }
> //remove data
> itr = removeIds.iterator();
> while(itr.hasNext()){
> String dataId = (String)itr.next();
> sessionData.remove(dataId);
> }
>
> }
>
> }
>
> /* (non-Javadoc)
> * @see
> javax.faces.event.PhaseListener#beforePhase(javax.faces.event.PhaseEvent)
> */
> public void beforePhase(PhaseEvent arg0) {
>
> //System.out.println("beforePhase:"+arg0.getPhaseId());
> }
>
> /* (non-Javadoc)
> * @see javax.faces.event.PhaseListener#getPhaseId()
> */
> public PhaseId getPhaseId() {
> return PhaseId.RENDER_RESPONSE;
> //return PhaseId.ANY_PHASE;
> }
>
> }
>
>
> public class DataSaveManager{
> public final static String
> sessionID="_DATA_SAVE_SESSION_ENTRY";
> public static Map getSessionDataMap(){
> FacesContext context = FacesContext.getCurrentInstance();
> ExternalContext ext = context.getExternalContext();
> return (Map)ext.getSessionMap().get(sessionID);
> }
>
> /**
> *
> * @param data
> * @param possiblePageList is LinkedList
> * @param pageRuleList is LinkedList wrap of LinkedList
> */
> public static void saveData(String dataId, Object data, LinkedList
> possiblePageList, LinkedList pageRuleList){
> getSessionDataMap().put(dataId,new
> SaveData(dataId,data, possiblePageList, pageRuleList));
> }
> public static void removeData(String dataId){
> getSessionDataMap().remove(dataId);
> }
> public static SaveData getSaveData(String dataId){
> return (SaveData)getSessionDataMap().get(dataId);
> }
>
> }
>
>
> public class SaveData{
> String dataId;
> Object data;
> LinkedList possiblePageList;
> LinkedList pageRuleList;
> public SaveData(String dataId, Object data, LinkedList
> possiblePageList, LinkedList pageRuleList){
> this.dataId = dataId;
> this.data = data;
> this.possiblePageList = possiblePageList;
> this.pageRuleList = pageRuleList;
> }
> public Object getData(){
> return data;
> }
> public LinkedList getPossiblePageList(){
> return possiblePageList;
> }
> public LinkedList getPageRuleList(){
> return pageRuleList;
> }
> public String getDataId(){
> return dataId;
> }
> }
>
>
>
> If this is possible, so we can make it in JSF1.2, it will solve lots
> problems.
>
>
> --
> Zhong Li
>
> WebJabber.Net
