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https://github.com/moses-smt/mosesdecoder.git
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125 lines
2.8 KiB
C++
125 lines
2.8 KiB
C++
#include <stdexcept>
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#include "util/check.hh"
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#include "util/exception.hh"
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#include "FeatureFunction.h"
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#include "moses/Hypothesis.h"
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#include "moses/Manager.h"
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#include "moses/TranslationOption.h"
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using namespace std;
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namespace Moses
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{
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multiset<string> FeatureFunction::description_counts;
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std::vector<FeatureFunction*> FeatureFunction::m_producers;
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FeatureFunction &FeatureFunction::FindFeatureFunction(const std::string& name)
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{
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for (size_t i = 0; i < m_producers.size(); ++i) {
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FeatureFunction &ff = *m_producers[i];
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if (ff.GetScoreProducerDescription() == name) {
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return ff;
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}
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}
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throw "Unknown feature " + name;
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}
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FeatureFunction::
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FeatureFunction(const std::string& description,
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const std::string& line)
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: m_tuneable(true)
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, m_numScoreComponents(1)
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{
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Initialize(description, line);
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}
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FeatureFunction::
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FeatureFunction(const std::string& description,
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size_t numScoreComponents,
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const std::string& line)
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: m_tuneable(true)
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, m_numScoreComponents(numScoreComponents)
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{
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Initialize(description, line);
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}
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void
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FeatureFunction::
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Initialize(const std::string& description, const std::string &line)
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{
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ParseLine(description, line);
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if (m_description == "") {
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size_t index = description_counts.count(description);
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ostringstream dstream;
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dstream << description;
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dstream << index;
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description_counts.insert(description);
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m_description = dstream.str();
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}
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ScoreComponentCollection::RegisterScoreProducer(this);
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m_producers.push_back(this);
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}
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FeatureFunction::~FeatureFunction() {}
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void FeatureFunction::ParseLine(const std::string& description, const std::string &line)
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{
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vector<string> toks = Tokenize(line);
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CHECK(toks.size());
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set<string> keys;
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for (size_t i = 1; i < toks.size(); ++i) {
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vector<string> args = TokenizeFirstOnly(toks[i], "=");
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CHECK(args.size() == 2);
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pair<set<string>::iterator,bool> ret = keys.insert(args[0]);
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UTIL_THROW_IF(!ret.second, util::Exception, "Duplicate key in line " << line);
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if (args[0] == "num-features") {
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m_numScoreComponents = Scan<size_t>(args[1]);
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} else if (args[0] == "name") {
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m_description = args[1];
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} else {
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m_args.push_back(args);
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}
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}
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}
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void FeatureFunction::SetParameter(const std::string& key, const std::string& value)
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{
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if (key == "tuneable") {
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m_tuneable = Scan<bool>(value);
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} else if (key == "filterable") { //ignore
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} else {
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UTIL_THROW(util::Exception, "Unknown argument " << key << "=" << value);
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}
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}
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void FeatureFunction::ReadParameters()
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{
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while (!m_args.empty()) {
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const vector<string> &args = m_args[0];
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SetParameter(args[0], args[1]);
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m_args.erase(m_args.begin());
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}
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}
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std::vector<float> FeatureFunction::DefaultWeights() const
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{
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UTIL_THROW(util::Exception, "No default weights");
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}
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}
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