/**
* Returns a SparseObjectColumn that holds only the data from rows <code>
* pos</code> through <code>pos+len</code>
*
* @param pos the row number which is the beginning of the subset
* @param len number of consequetive rows after <code>pos</code> that are to be included in the
* subset.
* @return a SparseObjectColumn with the data from rows <code>pos</code> through <code>pos+len
* </code>
*/
public Column getSubset(int pos, int len) {
SparseObjectColumn subCol = new SparseObjectColumn();
subCol.elements = (VIntObjectHashMap) elements.getSubset(pos, len);
getSubset(subCol, pos, len);
return subCol;
/*
//the map to hold the data of the subset
VIntObjectHashMap tempMap = new VIntObjectHashMap(len);
//for each Object from pos till pos+len
for (int i=0; i<len; i++)
//if a value is mapped to current inspected row number
if(elements.containsKey(pos+i))
//put it in the new map
tempMap.put(pos+i, getObject(pos+i));
SparseObjectColumn subCol = new SparseObjectColumn(); //the returned value
super.copy(subCol); //copying general attributes
//activating copy method in order to have a deep copy of the subset
subCol.elements = tempMap.copy(); //linking the data to the returned value
return subCol;
*/
}
