How to create child without master context.

Question

Hi,
I have a special requirement where I need to allow user to create a child record without master context.
I have two VOs MasterVO and ChildVO and have view link between those two. and cardinality is 0..1 to *. Here my master is read only VO. and it is typically group by of child attributes except Date column. I did like this, because my table is de-normalized table and column VersionNumber which is of type Date represent versions of each master. So I have created my Application module like below.
---MasterVO
         ---ChildVO.
In UI, when I create a child record using ChildVO, but due to view link, it is creating a record under the context of Master.  But is there any way where we can use the same ChildVO instance which is under masterVO to create a new record, but the newly created record should not be created under the context of master.
I want this requirement to reuse the jsff page, because, I have Create and Edit pages, both looks similar but In create I use ChildVO to input all the values, but in Edit page few attributes(which are common attributes except date for version to version of each master) are not editable, those will be under read only Master VO(I used group by here in VO to achieve this), and in edit screen we are allowing user to create new version of master where it copies all the values in the master VO except date. so in backend it get stored as separate record with different Date. 
Any help of this kind of implementation.
Thank you so much for your help in advance.
I am using JDev version  11.1.1.7.0.
Regards,
Dileep.

Answer 1

this wil surely work
RowKeySet selectedRows = treeTable.getSelectedRowKeys();
//use EL to access binding (note that you can do this in Java as well)
JUCtrlHierBinding treeTableBinding = (JUCtrlHierBinding) executeValueExpression("#{bindings.<tree binding name>}");  
//get first entry of selected rows (single selection case)
JUCtrlHierNodeBinding node =  treeTableBinding .findNodeByKeyPath((List)selectedRows .iterator().next());
... do the work with the node here ...
private Object executeValueExpression(String valueExpression){
      FacesContext fctx = FacesContext.getCurrentInstance();
      ELContext elctx = fctx.getELContext();
      Application app = fctx.getApplication();
      ExpressionFactory exprFactory = app.getExpressionFactory();
      ValueExpression valueExpr = exprFactory.createValueExpression(
                                elctx,
                                valueExpression,
                                Object.class);
       return valueExpr.getValue(elctx);