The following code is commonly shown and documented for how to access the row key of selected table rows in an ADF Faces table configured for multi row selection.

public void onRemoveSelectedTableRows(ActionEvent actionEvent) {
   RichTable richTable = … get access to your table instance …
   CollectionModel cm =(CollectionModel)richTable.getValue();
   RowKeySet rowKeySet = (RowKeySet)richTable.getSelectedRowKeys();        
  
   for (Object key : rowKeySet) {
      richTable.setRowKey(key);
      JUCtrlHierNodeBinding rowData = (JUCtrlHierNodeBinding)cm.getRowData();
      // do something with rowData e.g.update, print, copy
   }

   //optional, if you changed data, refresh the table      
   AdfFacesContext adfFacesContext = AdfFacesContext.getCurrentInstance();
   adfFacesContext.addPartialTarget(richTable);  
   return null;
}

The code shown above works for 99.5 % of all use cases that deal with multi row selection enabled ADF Faces tables, except for when users use the ctrl+a key to mark all rows for delete. Just to make sure I am clear: if you use ctrl+a to mark rows to perform any other operation on them – like bulk updating all rows for a specific attribute – then this works with the code shown above. Even for bulk row delete, any other mean of row selection (shift+click and multiple ctrl+click) works like a charm and the rows are deleted.

So apparently it is the use of ctrl+a that causes the problem when deleting multiple rows of an ADF Faces table. To implement code that works for all table selection use cases, including the one to delete all table rows in one go, you use the code shown below.

public void onRemoveSelectedTableRows(ActionEvent actionEvent) {
  RichTable richTable = … get access to your table instance …
  CollectionModel cm = (CollectionModel)richTable.getValue();
  RowKeySet rowKeySet = (RowKeySet)richTable.getSelectedRowKeys();

  Object[] rowKeySetArray = rowKeySet.toArray();   

  for (Object key : rowKeySetArray){           
    richTable.setRowKey(key);
    JUCtrlHierNodeBinding rowData = (JUCtrlHierNodeBinding)cm.getRowData();                           
    rowData.getRow().remove();
  }
  
  AdfFacesContext adfFacesContext = AdfFacesContext.getCurrentInstance();          
  adfFacesContext.addPartialTarget(richTable);
}