Instance *SequenceReader::GetNext() {
// Fill all fields for the entire sentence.
vector<vector<string> > sentence_fields;
string line;
if (is_.is_open()) {
while (!is_.eof()) {
getline(is_, line);
if (line.length() <= 0) break;
vector<string> fields;
StringSplit(line, "\t", &fields);
sentence_fields.push_back(fields);
}
}
// Sentence length.
int length = sentence_fields.size();
// Convert to array of words and tags.
vector<string> forms(length);
vector<string> tags(length);
for(int i = 0; i < length; ++i) {
const vector<string> &info = sentence_fields[i];
forms[i] = info[0];
tags[i] = info[1];
}
SequenceInstance *instance = NULL;
if (length > 0) {
instance = new SequenceInstance;
instance->Initialize(forms, tags);
}
return static_cast<Instance*>(instance);
}
