public static Tuple join(Tuple t1, Tuple t2, int joinkey1, int joinkey2) {
Tuple t = new Tuple(t1.getSize() + t2.getSize() - 1);
int fieldNumber = 0;
for (String f1 : t1.getFields()) t.set(fieldNumber++, f1);
for (String f2 : t2.getFields()) if (!t2.field[joinkey2].equals(f2)) t.set(fieldNumber++, f2);
return t;
}
// this constructor unserializes a string into a tuple
public static Tuple makeTupleFromPipeData(String line) {
StringTokenizer st = new StringTokenizer(line, separator, false);
int size = Integer.parseInt(st.nextToken());
Tuple t = new Tuple(size);
int fieldNumber = 0;
while (st.hasMoreTokens()) t.set(fieldNumber++, st.nextToken());
return t;
}
// this constructor unserializes a string into a tuple
public static Tuple makeTupleFromFileData(Relation r, String line) {
StringTokenizer st = new StringTokenizer(line);
int size = r.getSize();
Tuple t = new Tuple(size);
int fieldNumber = 0;
while (st.hasMoreTokens()) t.set(fieldNumber++, st.nextToken());
return t;
}