Multiple instances of a composite component in a view? - jsf-2

Question

I read many similar questions, but I cannot figure out how to solve my problem:
I wrote a composite component backed by a view-scoped, self-contained managed bean.
The component consists of an autocomplete textbox with a button that opens a dialog. The user can select an item either by name (autocomplete) or selecting a node in a tree (dialog).
The backing bean implements all the stuff needed (data access, tree-logics etc) and should expose the selected item (as a POJO).
Now I have 2 problems:
Due to the complexity of the tree management, selectedObj property is accessed by a getter and a setter that do some stuff in the bean: they are not simply accessing a class field. Now I'm passing the entire bean as an attribute. How can I just make the bean's selectedObj the "value" attribute of my composite component?
How can I use multiple instance of my component in the same view?
Here is an example of the component:
<cc:interface>
<cc:attribute name="bean" type="com.yankee.OUTreeBean" required="true"/>
<cc:attribute name="listener" method-signature="void listener()"/>
</cc:interface>
<cc:implementation>
<p:dialog id="#{cc.id}_dialog" widgetVar="_dlg" header="Select OU" modal="true" dynamic="true" >
<p:toolbar>
<!-- some buttons to refresh, expand, collapse etc. -->
</p:toolbar>
<p:tree id="#{cc.id}_tree" value="#{cc.attrs.bean.root}" var="node"
selectionMode="single"
selection="#{cc.attrs.bean.selectedNode}">
<p:ajax event="select" update="#form" listener="#{cc.attrs.listener}" oncomplete="if (!args.validationFailed) _dlg.hide()" />
<p:treeNode>
<h:outputText value="#{node.OU_NAME}" />
</p:treeNode>
</p:tree>
</p:dialog>
<p:autoComplete id="#{cc.id}_inner" value="#{cc.attrs.bean.selectedObj}" completeMethod="#{cc.attrs.bean.completeObj}"
var="obj" itemLabel="#{obj.OU_NAME}" itemValue="#{obj}"
forceSelection="true"
converter="ouConverter"
multiple="false"
minQueryLength="2">
<p:ajax event="itemSelect" listener="#{cc.attrs.listener}" update="#form"/>
</p:autoComplete>
<div style="float: right">
<p:commandButton id="bSearch" icon="ui-icon-search" onclick="_dlg.show()"/>
</div>
</cc:implementation>
The backing bean of the COMPONENT:
#ManagedBean
#ViewScoped
public class OUTreeBean implements Serializable {
private static final long serialVersionUID = 1L;
private List<OU> data; // Data as plain list
protected TreeNode root; // root node of data as a tree
protected TreeNode selectedNode;
#PostConstruct
private void init() throws SQLException {
refreshData();
}
public OU getSelectedObj() {
if (selectedNode == null) {
return null;
}
return ((OU) selectedNode.getData());
}
public void setSelectedObj(OU ou) {
// Find the right tree node and do whatever needed
}
public TreeNode selectedNode getSelectedNode() {
// Blah blah
}
public void setSelectedNode(TreeNode selectedNode) {
// Blah blah
}
public List<OU> completeObj(String namePattern) {
// Autocomplete handler
}
public void refreshData() {
// Blah blah
}
// etc...
}
The using page excerpt:
<ism:selectOUTree id="cbSelectOu" bean="#{myBean.ouFilterBean}" listener="#{myBean.onOUChange}"/>
The backing bean of the PAGE:
#ManagedBean
#ViewScoped
public class MyBean implements Serializable {
private static final long serialVersionUID = 1L;
#ManagedProperty("#{oUTreeBean}")
private OUTreeBean ouFilterBean;
public void onOUChange() throws SQLException {
// Blah blah
}
}

Answer 1

I had the same problem few days ago. Just like you I used ManagedBean as an object that should do the job. After some time I figured out that I should just create FacesComponent. I'm new in JSF so it wasn't that easy to find the solution but it solved all my problems. This is how does it work:
view.xhtml
<h:body>
<cc:interface componentType="playerComponent">
<cc:attribute name="playerId" required="true"/>
</cc:interface>
<cc:implementation>
<c:set var="inplaceId" value="inplace-#{cc.attrs.playerId}" />
<c:set var="outputId" value="output-#{cc.attrs.playerId}" />
<h:form id="form-#{cc.attrs.playerId}">
<p:inplace editor="false" widgetVar="#{inplaceId}">
<h:inputText value="#{cc.player.name}" id="outputId"/>
<p:commandButton onclick="#{inplaceId}.save()" action="#{cc.save}" update="#{outputId}" value="save" />
<p:commandButton onclick="#{inplaceId}.cancel()" update="#{outputId}" value="cancel" />
</p:inplace>
</h:form>
</cc:implementation>
</h:body>
PlayerComponent.java
#FacesComponent("playerComponent")
public class PlayerComponent extends UINamingContainer {
private Player player;
private void init() {
Object idObj = getAttributes().get("playerId");
if (idObj != null) {
// create player object
}
}
public void save() {
// save player object
}
public Player getPlayer() {
if (player == null) {
init();
}
return player
}
}
Player.java (entity)
public class Player {
private name;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
As I wrote I'm new in JSF and probably player object should be created in different way (using #PostConstruct on in constructor?) but this work.