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#ifndef FEATURE_ACCUM_H
#define FEATURE_ACCUM_H
#include "ff.h"
#include "sparse_vector.h"
#include "value_array.h"
struct SparseFeatureAccumulator : public FeatureVector {
typedef FeatureVector State;
SparseFeatureAccumulator() { }
template <class FF>
FeatureVector const& describe(FF const& ) { return *this; }
void Store(FeatureVector *fv) const {
fv->set_from(*this);
}
template <class FF>
void Store(FF const& /* ff */,FeatureVector *fv) const {
fv->set_from(*this);
}
template <class FF>
void Add(FF const& /* ff */,FeatureVector const& fv) {
(*this)+=fv;
}
void Add(FeatureVector const& fv) {
(*this)+=fv;
}
/*
SparseFeatureAccumulator(FeatureVector const& fv) : State(fv) {}
FeatureAccumulator(Features const& fids) {}
FeatureAccumulator(Features const& fids,FeatureVector const& fv) : State(fv) {}
void Add(Features const& fids,FeatureVector const& fv) {
*this += fv;
}
*/
void Add(int i,Featval v) {
(*this)[i]+=v;
}
void Add(Features const& fids,int i,Featval v) {
(*this)[i]+=v;
}
};
struct SingleFeatureAccumulator {
typedef Featval State;
typedef SingleFeatureAccumulator Self;
State v;
/*
void operator +=(State const& o) {
v+=o;
}
*/
void operator +=(Self const& s) {
v+=s.v;
}
SingleFeatureAccumulator() : v() {}
template <class FF>
State const& describe(FF const& ) const { return v; }
template <class FF>
void Store(FF const& ff,FeatureVector *fv) const {
fv->set_value(ff.fid_,v);
}
void Store(Features const& fids,FeatureVector *fv) const {
assert(fids.size()==1);
fv->set_value(fids[0],v);
}
/*
SingleFeatureAccumulator(Features const& fids) { assert(fids.size()==1); }
SingleFeatureAccumulator(Features const& fids,FeatureVector const& fv)
{
assert(fids.size()==1);
v=fv.get_singleton();
}
*/
template <class FF>
void Add(FF const& ff,FeatureVector const& fv) {
v+=fv.get(ff.fid_);
}
void Add(FeatureVector const& fv) {
v+=fv.get_singleton();
}
void Add(Features const& fids,FeatureVector const& fv) {
v += fv.get(fids[0]);
}
void Add(Featval dv) {
v+=dv;
}
void Add(int,Featval dv) {
v+=dv;
}
void Add(FeatureVector const& fids,int i,Featval dv) {
assert(fids.size()==1 && i==0);
v+=dv;
}
};
#if 0
// omitting this so we can default construct an accum. might be worth resurrecting in the future
struct ArrayFeatureAccumulator : public ValueArray<Featval> {
typedef ValueArray<Featval> State;
template <class Fsa>
ArrayFeatureAccumulator(Fsa const& fsa) : State(fsa.features_.size()) { }
ArrayFeatureAccumulator(Features const& fids) : State(fids.size()) { }
ArrayFeatureAccumulator(Features const& fids) : State(fids.size()) { }
ArrayFeatureAccumulator(Features const& fids,FeatureVector const& fv) : State(fids.size()) {
for (int i=0,e=i<fids.size();i<e;++i)
(*this)[i]=fv.get(i);
}
State const& describe(Features const& fids) const { return *this; }
void Store(Features const& fids,FeatureVector *fv) const {
assert(fids.size()==size());
for (int i=0,e=i<fids.size();i<e;++i)
fv->set_value(fids[i],(*this)[i]);
}
void Add(Features const& fids,FeatureVector const& fv) {
for (int i=0,e=i<fids.size();i<e;++i)
(*this)[i]+=fv.get(i);
}
void Add(FeatureVector const& fids,int i,Featval v) {
(*this)[i]+=v;
}
};
#endif
#endif
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