/**
* sorts the elements in this column so that the rows that were originally valid remain valid
* after sorting Note - sort() supports only Comparable Objects or char arrays or byte arrays.
* using sort with objects different than the above will throw an exception.
*/
public void sort() {
VIntIntHashMap newOrder = getNewOrder();
elements = (VIntObjectHashMap) elements.reorder(newOrder);
missing = missing.reorder(newOrder);
empty = empty.reorder(newOrder);
}
/**
* Reorders the data stored in this column in a new column. Does not change this column.
*
* <p>Algorithm: copy this column into the returned vlaue. for each pair (key, val) in <code>
* newOrder</code>, if val is a valid row in this column, put the value mapped to it in row no.
* key in the returned values.
*
* @param newOrder - an int to int hashmap, defining the new order for the returned column.
* @return a SparseObjectColumn ordered according to <code>newOrder</code>.
*/
public Column reorderRows(VIntIntHashMap newOrder) {
SparseObjectColumn retVal = new SparseObjectColumn();
retVal.elements = (VIntObjectHashMap) elements.reorder(newOrder);
reorderRows(retVal, newOrder);
return retVal;
}