RichFaces rich：tree nodeFace类型未分配

Question

I've a rich:tree in my JSF like so:

            <rich:tree value="#{MyBacking.treeNodes}" var="item"
                nodeFace="#{item.type}">
                <rich:treeNode type="folder"
                    <h:outputText value="#{item.folder}" />
                </rich:treeNode>
                <rich:treeNode type="file"
                    <h:outputText value="#{item.contfile}" />
                </rich:treeNode>
            </rich:tree>

and the java runtime error

'#{item.type}' Property 'type' not found on type java.lang.String

But I've looked at the javadoc for org.richfaces.model.TreeNodeImpl and there's no mention of a method to assign a type to a tree node. How is this done?

EDIT I have modified the code as per the supplied answer. Although it feels right, my tree is now being ignored. The java looks like this:

In my backing bean (MyBacking):

public TreeNodeImpl<LogTreeItem> getTreeNodes() {
    TreeNodeImpl<LogTreeItem> rootNode = new TreeNodeImpl<LogTreeItem>();
    LogTreeItem rootItem = new LogTreeItem();
    rootItem.setType("folder");
    rootItem.setName("folderName");
    rootNode.setData(rootItem);

    return rootNode;
}

item class:

public class LogTreeItem {
    private String type; 
    private String name; 

    public String getType() {
        return type;
    }

    public void setType(String t) {
        type = t;
    }

    public String getName() {
        return name;
    }

    public void setName(String n) {
        name = n;
    }
}

JSF snippet thus is now:

            <rich:tree value="#{MyBacking.treeNodes}" var="item" nodeFace="#{item.type}">
                <rich:treeNode type="folder">
                    <h:outputText value="#{item.name}" />
                </rich:treeNode>
            </rich:tree>

All I'm trying to do at this point is get a tree recognised. As I'm only creating a tree with a rootNode, I was expecting a one node tree output, but instead I'm seeing nothing at all. I know I'm close but I just cannot see what tweak would bring it to life.

Thanks a lot

Answer 1

It appears that your item is of type String . The nodeFace attribute determines which one of the nodes defined below will be rendered for each item .

You must populate your tree with nodes containing data of your custom type. Let's say your item looks like this:

public class Item {
    private String type; //getter+setter
    private String folder; //getter+setter
    private String contfile; //getter+setter
}

Then treeNodes should actually be rootNode , and must look like this:

rootNode = new TreeNodeImpl<Item>();
for (some loop here) {
    TreeNode<Item> node = new TreeNodeImpl<Item>();
    Item item = ..; //get or create the item;
    node.setData(item);
    node.setParent(rootNode);
    rootNode.addChild("someIdentifier", node);
}

I'd suggest checking out richfaces demo sources to see how it is implemented there.