public Stats(List<AggregationField> fields, List<String> clause) {
this.EMPTY_KEY = new ArrayList<Object>(0);
this.clauses = clause;
this.clauseCount = clauses.size();
this.useClause = clauseCount > 0;
this.fields = fields;
this.funcs = new AggregationFunction[fields.size()];
this.fieldOrder = new ArrayList<String>(clauses);
// prepare template functions
for (int i = 0; i < fields.size(); i++) {
AggregationField f = fields.get(i);
this.funcs[i] = f.getFunction();
this.fieldOrder.add(f.getName());
}
}
@Override
public String toString() {
String aggregation = "";
int i = 0;
for (AggregationField f : this.fields) {
if (i++ != 0) aggregation += ",";
aggregation += " " + f.toString();
}
String clause = "";
if (!clauses.isEmpty()) {
clause = " by";
i = 0;
for (String c : clauses) {
if (i++ != 0) clause += ",";
clause += " " + c;
}
}
return "stats" + aggregation + clause;
}
