/**
* Creates a map from column id to value according to the aggregation columns.
*
* @param row The table row.
* @param table The table.
* @return A map from column id to value according to the aggregation columns.
*/
private Map<String, Value> getValuesToAggregate(TableRow row, DataTable table) {
Map<String, Value> result = Maps.newHashMap();
// The map is generated by looking for the values of the aggregation columns
// in the table row.
for (String columnId : aggregateColumns) {
Value curValue = row.getCell(table.getColumnIndex(columnId)).getValue();
result.put(columnId, curValue);
}
return result;
}
/**
* Creates a path for the aggregation tree defined by a table row.
*
* @param row The table row.
* @param table The table.
* @param depth The depth of the desired path.
* @return A path for the aggregation tree defined by the table row.
*/
public AggregationPath getRowPath(TableRow row, DataTable table, int depth) {
AggregationPath result = new AggregationPath();
// The tree path is generated by looking for the values of the group-by
// columns in the table row (in the correct order).
for (int i = 0; i <= depth; i++) {
String columnId = groupByColumns.get(i);
Value curValue = row.getCell(table.getColumnIndex(columnId)).getValue();
result.add(curValue);
}
return result;
}