/**
* Returns the object at row # row
*
* @param row the row number
* @return the object at row # row. if no such object exists - returns null.
*/
public Object getObject(int row) {
if (elements.containsKey(row)) {
return elements.get(row);
} else {
return SparseDefaultValues.getDefaultObject();
}
}
/**
* returns a subset of this column with entried from rows indicated by <code>indices</code>.
*
* @param indices row numbers to include in the returned subset.
* @return a subset of this column, including rows indicated by <code>indices</code>.
*/
public Column getSubset(int[] indices) {
SparseObjectColumn retVal = new SparseObjectColumn(indices.length);
for (int i = 0; i < indices.length; i++) {
if (elements.containsKey(indices[i])) {
// XIAOLEI
// retVal.setObject(getObject(indices[i]), indices[i]);
retVal.setObject(getObject(indices[i]), i);
}
}
super.getSubset(retVal, indices);
return retVal;
}