Duplicate nodes in ADF Tree

Duplicate Entries in ADF Tree
Hi,
Iam facing issue with ADF Tree representation. Getting content from DB. I've a table with self reference. Iam able to provide check box for each node. Following is the usecase of issue
a->b->c->1.xml
a->b1->c1->2.xml
a->b2->c2->3.xml
Issue 1: It's dispaling 3 a's at the first level. But it should display a once within that b,b1,b2 as sub levels.
Even though it's showing 'a' three times, if we click on second & third 'a', first 'a' is effecting. Please suggest to filter duplicate entries while displaing. Following is code snippet of jspx.
<af:tree value="#{bindings.ParentMDTopic1.treeModel}" var="node"
selectionListener="#{bindings.ParentMDTopic1.treeModel.makeCurrent}"
rowSelection="multiple" id="t1"
partialTriggers="#{pageFlowScope.mBean.checkboxFlag.addValueChangeListener}">
<f:facet name="nodeStamp">
<af:group id="g1">
<!-- <af:selectBooleanCheckbox
label="Label 1" id="sbc2"
valueChangeListener="#{pageFlowScope.mBean.checkBoxChange}"/> -->
<af:selectBooleanCheckbox label="Label 1" id="sbc2"
value="#{node.checkboxFlag}"
autoSubmit="true"
valueChangeListener="#{pageFlowScope.mBean.checkBoxChange}"/>
<af:outputText value="#{node}" id="ot1"/>
</af:group>
</f:facet>
</af:tree>
Issue 2: Select/Deselect functionality. If we click on any node, the child nodes & sub levels till leaf nodes should be in select state. Similarly for deselect functionality.
In order to acheve functionality, Created two transient attributes of boolean & string type. I tired to debug the ManagedBean, seems to be it's traversing to sublevels & changing the transient attribute. But while display it's not effeting. Please suggest a hint on this. It could be great if you provide some useful pointers to refer.
Thanks in advance,
Samba.

Hi,
I've provided Parent-Child relationship(Self-reference).
Following is the table structure with primary/foreign key constraints.
DELIVERY_VERSION_ID (PK)(FK)
HIERARCHY_ID (PK)(FK)
DOC_GUID (PK)
PARENT (FK)
CURRENTTITLE
LANGUAGE
Please let me know, if you have any comments on table structure.
Following is the sample data in table
DELIVERY_VERSION_ID     DOC_GUID Parent HIERARCHY_ID
3               a     null     a_b_c
3               b     a     a_b_c
3               c     b     a_b_c
3               1.xml     c     a_b_c
3               a     null     a_b1_c1
3               b1     a     a_b1_c1
3               c1     b1     a_b1_c1
3               2.xml     c1     a_b1_c1
3               a     null     a_b2_c2
3               b2     a     a_b2_c2
3               c2     b2     a_b2_c2
3               3.xml     c2     a_b2_c2
Thanks,
Samba.

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