Setting Row in Iterator by Attribute Value

Question

Hello,
I'm using ADF business components in Jdeveloper 10.1.33.
I have a table that lists some values. I want the user to be able to click a row in that table and have a separate iterator set the current row to one that has the same value as the row in the table.
I can't just use the key because the view objects have different values, and I can't just use a view link because the table is controlled by the iterator I want to change.
So far I've tried two methods:
// My first try was just taking the rowkey from the table and using it to set the key on my other iterator:
public void selectParentReq(ActionEvent Event){
       FacesContext fctx = FacesContext.getCurrentInstance();
       // From the table . . .
       ValueBinding vb = (ValueBinding) fctx.getApplication().createValueBinding("#{row}");
       JUCtrlValueBindingRef rwbinding = (JUCtrlValueBindingRef) vb.getValue(fctx);
       String rowkey = rwbinding.getRow().getKey().toStringFormat(true);
       // To the iterator . . .
       vb = fctx.getApplication().createValueBinding("#{bindings.vReqtotalp1Iterator}");
       DCIteratorBinding dciterReqView = (DCIteratorBinding)vb.getValue(fctx);
       dciterReqView.setCurrentRowWithKeyValue((String)rowkey );
// But what happens there is that it tries to send a key of [value, null, null, null]. Which is not right. So next I tried building my own key:
    public void selectParentReq(ActionEvent Event){
       FacesContext fctx = FacesContext.getCurrentInstance();
       ValueBinding vb = (ValueBinding) fctx.getApplication().createValueBinding("#{row}");
       JUCtrlValueBindingRef rwbinding = (JUCtrlValueBindingRef) vb.getValue(fctx);
       Object Engineid = rwbinding.getRow().getAttribute("EngineId");
       Object Levelid = rwbinding.getRow().getAttribute("LevelId");
       Object Parentreq = rwbinding.getRow().getAttribute("Parentreq");
      java.lang.Object[] superkey = {Engineid, Levelid, Parentreq, Parentreq};
       vb = fctx.getApplication().createValueBinding("#{bindings.vReqtotalp1Iterator}");
       DCIteratorBinding dciterReqView = (DCIteratorBinding)vb.getValue(fctx);
       dciterReqView.setCurrentRowWithKeyValue((String)superkey );
      // But I can't cast my Array to String, and I can't find any function that takes the arraw as an argument
    }I feel like I'm missing something really obvious here, and I would really appreciate any help.
Thanks,
-Nelson

Answer 1

How about this? Don't use a view link instance in your application module, but still use a view link definition, and then use its accessor methods.
E.g., in a service method on the view object class displaying the list:
public void findMatchingRows(Key keyForThisVo, String targetIteratorName) {
    Row[] selectedRowArray = findByKey(keyForThisVo);
    ViewRowImpl selectedRow = (ViewRowImpl) Row[0];
    RowIterator targetRows = selectedRow.getAttribute("NameOfViewLinkAccessor");
    Row targetRow = targetRows.first();
    RowSetIterator iterator = targetRow.getViewObject().findRowSetIterator(targetIteratorName);
    iterator.setCurrentRow(targetRow);
}This should find the row matching the key you passed in, get its detail rows, and set the appropriate iterator in the target view object to the first detail row. Expose this as a client method and invoke it.
(Warning: I haven't tested the above code; it's an outline/example.)