package test;

import java.util.ArrayList;
import java.util.List;

import org.zkoss.zul.DefaultTreeModel;
import org.zkoss.zul.DefaultTreeNode;
import org.zkoss.zul.TreeNode;

public class TreeVM {

    public DefaultTreeModel<String> getItems() {
        final List<TreeNode<String>> parent = new ArrayList<TreeNode<String>>();
        for (int i = 0; i < 600; i++) {
            final List<TreeNode<String>> children = new ArrayList<TreeNode<String>>();
            for (int j = 0; j < 600; j++) {
                children.add(new DefaultTreeNode<String>("Child node " + j));
            }
            parent.add(new DefaultTreeNode<String>("Node " + i, children));
        }
        final TreeNode<String> root = new DefaultTreeNode<String>("root", parent);
        return new DefaultTreeModel<String>(root);
    }
}