I have a wrapper class called Node implementing TreeNode from RichFaces. I try to avoid recursively populating the whole tree and so have a mechanism in there to populate each node as they are referred. And in conjunction with the "ajax" property of the tree component, I expect the individual population of the nodes happening in the ajax calls. The class "Node" basically keeps a Map (required to be a Map by the tree) of my Category objects that are children of the wrapped Category object when populated. I provide these details because I could not figure out what kind of a component the Node should be. My proof of concept does not even start by populating the root node. I try to inject the session (I use Hibernate/session instead of JPA/em) but it is injected null or not injected. So the question is if my "Node" should be a Seam component to have the Hibernate session injected and if so what kind of a scope I should put it in? Here follows my Node class: | public class Node<E extends Treeable<E>> implements TreeNode { | | @In(create=true) | private Session session; | | private E value; | Node parent; | | public Node(E aValue, Node<E> parent) { | value=aValue; | this.parent=parent; | System.out.println("initing Node with Treeable="+aValue.getName()); | } | | private Map<Long,Node<E>> dataMap; | | public Node(String className) { | List<E> rooties; | System.out.println("Expanding root. session is"+session); | rooties=session.createQuery("from "+className+" where parent"+className+" is null") | .list(); | | System.out.println("Root has "+rooties.size()+" rooties"); | dataMap=new HashMap<Long,Node<E>>(); | for(E rootie:rooties){ | Node node=new Node(rootie,this); | dataMap.put(rootie.getId(),node); | System.out.println("Rootie :"+rootie.getName()+" was added to roots"); | } | | System.out.println("initing rooties done"); | } | | | public Map<Long, Node<E>> getDataMap() { | if (dataMap==null){ | List<E> children; | System.out.println("Expanding Node:"+value); | String className=value.getClass().getName(); | children=session.createQuery("from "+className+" where parent"+className+"= :parent") | .setEntity("parent",value) | .list(); | | dataMap=new HashMap<Long,Node<E>>(); | for(E child:value.getChildren()){ | Node node=new Node(child,this); | dataMap.put(child.getId(),node); | } | } | return dataMap; | } | | public Object getData() { | return this; | } | | public void setData(Object data) { | } | | public boolean isLeaf() { | return getDataMap().isEmpty(); | } | | public Iterator getChildren() { | System.out.println("getChildren is called for:"+toString()); | return getDataMap().entrySet().iterator(); | } | | public TreeNode getChild(Object id) { | return getDataMap().get(id); | } | | public void addChild(Object identifier, TreeNode child) { | } | | public void removeChild(Object id) { | } | | public TreeNode getParent() { | System.out.println("getParent is called for:"+toString()); | return parent; | } | | | public void setParent(TreeNode treeNode) { | System.out.println("setParent is called with:"+treeNode); | } | | public String getType(){ | return (value==null)?"root":value.getType(); | } | | public String toString(){ | ... | } | | public String getName(){ | return value.getName(); | } | | public E getValue() { | return value; | } | | } | View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4074495#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...