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#include "arc_ff.h"
#include "tdict.h"
#include "fdict.h"
#include "sentence_metadata.h"
using namespace std;
struct ArcFFImpl {
ArcFFImpl() : kROOT("ROOT"), kLEFT_POS("LEFT"), kRIGHT_POS("RIGHT") {}
const string kROOT;
const string kLEFT_POS;
const string kRIGHT_POS;
map<WordID, vector<int> > pcs;
void PrepareForInput(const TaggedSentence& sent) {
pcs.clear();
for (int i = 0; i < sent.pos.size(); ++i)
pcs[sent.pos[i]].resize(1, 0);
pcs[sent.pos[0]][0] = 1;
for (int i = 1; i < sent.pos.size(); ++i) {
const WordID posi = sent.pos[i];
for (map<WordID, vector<int> >::iterator j = pcs.begin(); j != pcs.end(); ++j) {
const WordID posj = j->first;
vector<int>& cs = j->second;
cs.push_back(cs.back() + (posj == posi ? 1 : 0));
}
}
}
template <typename A>
static void Fire(SparseVector<weight_t>* v, const A& a) {
ostringstream os;
os << a;
v->set_value(FD::Convert(os.str()), 1);
}
template <typename A, typename B>
static void Fire(SparseVector<weight_t>* v, const A& a, const B& b) {
ostringstream os;
os << a << '_' << b;
v->set_value(FD::Convert(os.str()), 1);
}
template <typename A, typename B, typename C>
static void Fire(SparseVector<weight_t>* v, const A& a, const B& b, const C& c) {
ostringstream os;
os << a << '_' << b << '_' << c;
v->set_value(FD::Convert(os.str()), 1);
}
template <typename A, typename B, typename C, typename D>
static void Fire(SparseVector<weight_t>* v, const A& a, const B& b, const C& c, const D& d) {
ostringstream os;
os << a << '_' << b << '_' << c << '_' << d;
v->set_value(FD::Convert(os.str()), 1);
}
template <typename A, typename B, typename C, typename D, typename E>
static void Fire(SparseVector<weight_t>* v, const A& a, const B& b, const C& c, const D& d, const E& e) {
ostringstream os;
os << a << '_' << b << '_' << c << '_' << d << '_' << e;
v->set_value(FD::Convert(os.str()), 1);
}
void EdgeFeatures(const TaggedSentence& sent,
short h,
short m,
SparseVector<weight_t>* features) const {
const bool is_root = (h == -1);
int num_words = sent.words.size();
const string& head_word = (is_root ? kROOT : TD::Convert(sent.words[h]));
const string& head_pos = (is_root ? kROOT : TD::Convert(sent.pos[h]));
const string& mod_word = TD::Convert(sent.words[m]);
const string& mod_pos = TD::Convert(sent.pos[m]);
const string& mod_pos_L = (m > 0 ? TD::Convert(sent.pos[m-1]) : kLEFT_POS);
const string& mod_pos_R = (m < sent.pos.size() - 1 ? TD::Convert(sent.pos[m]) : kRIGHT_POS);
const bool dir = m < h;
int v = m - h;
if (v < 0) {
v= -1 - int(log(-v) / log(2));
} else {
v= int(log(v) / log(2));
}
ostringstream os;
if (v < 0) os << "LenL" << -v; else os << "LenR" << v;
const string lenstr = os.str();
if (is_root) {
Fire(features, "ROOT", mod_pos);
Fire(features, "DROOT", mod_pos, lenstr);
Fire(features, "LROOT", mod_pos_L);
Fire(features, "RROOT", mod_pos_R);
Fire(features, "LROOT", mod_pos_L, mod_pos);
Fire(features, "RROOT", mod_pos_R, mod_pos);
Fire(features, "LDist", m);
Fire(features, "RDist", m - num_words);
} else { // not root
const string& head_pos_L = (h > 0 ? TD::Convert(sent.pos[h-1]) : kLEFT_POS);
const string& head_pos_R = (h < sent.pos.size() - 1 ? TD::Convert(sent.pos[h]) : kRIGHT_POS);
Fire(features, lenstr);
Fire(features, "H", head_pos);
Fire(features, "M", mod_pos);
Fire(features, "HM", head_pos, mod_pos);
Fire(features, "HM", head_pos, mod_pos, dir);
Fire(features, "HM", head_pos, mod_pos, lenstr);
Fire(features, "LexH", head_word);
Fire(features, "LexM", mod_word);
Fire(features, "LexHM", head_word, mod_word);
Fire(features, "LexHM", head_word, mod_word, dir);
Fire(features, "LexHM", head_word, mod_word, lenstr);
// surrounders
Fire(features, "posLL", head_pos, mod_pos, head_pos_L, mod_pos_L);
Fire(features, "posRR", head_pos, mod_pos, head_pos_R, mod_pos_R);
Fire(features, "posLR", head_pos, mod_pos, head_pos_L, mod_pos_R);
Fire(features, "posRL", head_pos, mod_pos, head_pos_R, mod_pos_L);
Fire(features, "lexRL", head_word, head_pos_L, mod_pos_L);
// between features
int left = min(h,m);
int right = max(h,m);
if (right - left > 2) {
++left;
for (map<WordID, vector<int> >::const_iterator it = pcs.begin(); it != pcs.end(); ++it) {
if (it->second[left] != it->second[right])
Fire(features, "BT", head_pos, TD::Convert(it->first), mod_pos);
}
}
}
}
};
ArcFeatureFunctions::ArcFeatureFunctions() : pimpl(new ArcFFImpl) {}
ArcFeatureFunctions::~ArcFeatureFunctions() { delete pimpl; }
void ArcFeatureFunctions::PrepareForInput(const TaggedSentence& sentence) {
pimpl->PrepareForInput(sentence);
}
void ArcFeatureFunctions::EdgeFeatures(const TaggedSentence& sentence,
short h,
short m,
SparseVector<weight_t>* features) const {
pimpl->EdgeFeatures(sentence, h, m, features);
}
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