@Override
public KEY getKey(TaggedUnion<T1, T2> value) throws Exception {
if (value.isOne()) {
return keySelector1.getKey(value.getOne());
} else {
return keySelector2.getKey(value.getTwo());
}
}
@Override
public TaggedUnion<T1, T2> copy(TaggedUnion<T1, T2> from, TaggedUnion<T1, T2> reuse) {
if (from.isOne()) {
return TaggedUnion.one(oneSerializer.copy(from.getOne()));
} else {
return TaggedUnion.two(twoSerializer.copy(from.getTwo()));
}
}
@Override
public void serialize(TaggedUnion<T1, T2> record, DataOutputView target) throws IOException {
if (record.isOne()) {
target.writeByte(1);
oneSerializer.serialize(record.getOne(), target);
} else {
target.writeByte(2);
twoSerializer.serialize(record.getTwo(), target);
}
}
@Override
public void apply(KEY key, W window, Iterable<TaggedUnion<T1, T2>> values, Collector<T> out)
throws Exception {
List<T1> oneValues = new ArrayList<>();
List<T2> twoValues = new ArrayList<>();
for (TaggedUnion<T1, T2> val : values) {
if (val.isOne()) {
oneValues.add(val.getOne());
} else {
twoValues.add(val.getTwo());
}
}
wrappedFunction.coGroup(oneValues, twoValues, out);
}