wicket , build on every time RepeatingView is called -

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i have copied fromwicket site listeditor component support adding item in run time:

public abstract class listeditor<t> extends repeatingview implements iformmodelupdatelistener { list<t> items;  public listeditor(string id, imodel<list<t>> model) {     super(id, model);     setoutputmarkupid(true); }  protected abstract void onpopulateitem(listitem<t> item);  public void additem(t value) {     items.add(value);     listitem<t> item = new listitem<t>(newchildid(), items.size() - 1);     add(item);     onpopulateitem(item); }  @override protected void onbeforerender() {     if (!hasbeenrendered()) {         list<t> modelobject = getmodelobject();         if (modelobject != null) {             items = new arraylist<t>(modelobject);             (int = 0; < items.size(); i++) {                 listitem<t> li = new listitem<t>(newchildid(), i);                 add(li);                 onpopulateitem(li);             }         } else {             items = new arraylist<t>();         }     }     super.onbeforerender(); }  @override public void updatemodel() {     setmodelobject(items); }  /**  * indicates whether or not item can removed, use of  * {@link removebutton}  *   * @param items  * @param item  * @return  */ public boolean canremove(list<t> items, t item) {     return true; }  @suppresswarnings("unchecked") final boolean checkremove(listitem<?> item) {     list<t> list = collections.unmodifiablelist(items);     listitem<t> li = (listitem<t>) item;     return canremove(list, li.getmodelobject()); }  /**  * gets model  *   * @return model  */ @suppresswarnings("unchecked") public final imodel<list<t>> getmodel() {     return (imodel<list<t>>) getdefaultmodel(); }  /**  * sets model  *   * @param model  */ public final void setmodel(imodel<list<t>> model) {     setdefaultmodel(model); }  /**  * gets model object  *   * @return model object  */ @suppresswarnings("unchecked") public final list<t> getmodelobject() {     return (list<t>) getdefaultmodelobject(); }  /**  * sets model object  *   * @param object  */ public final void setmodelobject(list<t> object) {     setdefaultmodelobject(object); } }

problem : want every time refresh called build 0 component , when ever add item, how can achive ?

you can use ajax calls add items normal listview well. make sure item added added underlying list (typically using loadabledetachablemodel) in ajaxcall, refresh entire listview adding ajaxrequesttarget , setting setreuseitems false.

something like:

loadabledetachablemodel<list<myobject>> mylistmodel = new loadabledetachablemodel<list<myobject>>() {   public list<myobject> load()   {     return generatelistdynamically(); //or whatever method use retrieve list including items you've added   } }  listview<myobject> items = new listview("items", mylistmodel); items.setreuseitems(false); add(items);  //a method call in onclick of link adds or removes item. public void onitemadd(ajaxrequesttarget target) {   //should accessible, maybe make member of page or   target.add(items); }

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