java - Smartgwt:刷新树组件上的数据

我正在使用smartgwt树组件。我试图将其扩展到usertree，如下面的类：

public UserTree() {

    final List<NewNode> lista = new ArrayList<NewNode>();
    lista.add(new NewNode(4,"333"));
    setModelType(TreeModelType.PARENT);
    setIdField("UserViewId");
    setParentIdField("ReportsTo");
    setNameProperty("Uzytkownicy");
    zapelnijListeUzytkownikow(lista);
    setRootValue(1);
    setData(userViewData);

    administrationService.zapelnijListeWezlow(token, new AsyncCallback<List<NewNode>>() {
        @Override
        public void onSuccess(List<NewNode> result) {

            zapelnijListeUzytkownikow(result);
            setData(userViewData);
        }

        @Override
        public void onFailure(Throwable caught) {
            Window.alert("fail");
        }
    };
}

protected TreeNode[] zapelnijListeUzytkownikow(List<NewNode> result) {

    userViewData = new TreeNode[12];
    /*  userViewData = new TreeNode[result.size() + 4];

    userViewData[0] = new UserViewTreeNode("2", "1", "Administratorzy");
    userViewData[1] = new UserViewTreeNode("3", "1", "Uprzywilejowani");
    userViewData[2] = new UserViewTreeNode("4", "1", "Uzytkownicy");
    userViewData[3] = new UserViewTreeNode("5", "1", "Pozostali");
    int i = 4;
    for(NewNode nn : result) {
       userViewData[i] = new UserViewTreeNode(String.valueOf(nn.getId()), "2", nn.getName());
       i++;
    }*/
    userViewData[0] = new UserViewTreeNode("2", "1", "Administratorzy");
    userViewData[1] = new UserViewTreeNode("3", "1", "Uprzywilejowani");
    userViewData[2] =new UserViewTreeNode("4", "1", "Uzytkownicy");
    userViewData[3] =new UserViewTreeNode("5", "1", "Pozostali");
    userViewData[4] = new UserViewTreeNode("18", "2", "Fasola Jan");
    userViewData[5] =new UserViewTreeNode("19", "2", "Puchatek Jakub");
    userViewData[6] =new UserViewTreeNode("20", "3", "Klapouchy");
    userViewData[7] =new UserViewTreeNode("21", "3", "Król Lew");
    userViewData[8] =new UserViewTreeNode("22", "4", "Bolek");
    userViewData[9] =new UserViewTreeNode("23", "4", "Lolek");
    userViewData[10] =new UserViewTreeNode("24", "5", "Gargamel");
    userViewData[11] =new UserViewTreeNode("25", "5", "Ciamajda");

    return userViewData;
}

我想使用asyncallback将数据库中的数据放到这棵树上。它运行良好，但是如果我想在onSuccess方法中使用setData方法，则会收到错误消息：

“在创建组件之后，无法将配置属性'data'更改为[Lcom.smartgwt.client.widgets.tree.TreeNode; @ 3c01807]。

创建树后如何刷新树上的数据？我想清理树上的所有值，然后将ZapelnijListeWezlow方法生成的值放入
谢谢你的帮助！

最佳答案

我想我找到了答案。树组件是只读的。但是treegrid没有。所以我决定将TreeGrid扩展到UserTreeGrid，并且总是在我想刷新树时总是这样做：

UserTreeView ust = new UserTreeView（）;
...
...
...
ust.setData（tree）