mosesdecoder/moses/TargetPhrase.cpp
2014-08-08 15:59:34 +01:00

301 lines
9.1 KiB
C++

// $Id$
/***********************************************************************
Moses - factored phrase-based language decoder
Copyright (C) 2006 University of Edinburgh
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
***********************************************************************/
#include <algorithm>
#include <stdlib.h>
#include "util/exception.hh"
#include "util/tokenize_piece.hh"
#include "TargetPhrase.h"
#include "GenerationDictionary.h"
#include "LM/Base.h"
#include "StaticData.h"
#include "ScoreComponentCollection.h"
#include "Util.h"
#include "AlignmentInfoCollection.h"
#include "InputPath.h"
#include "moses/TranslationModel/PhraseDictionary.h"
using namespace std;
namespace Moses
{
TargetPhrase::TargetPhrase(const PhraseDictionary *pt)
:Phrase()
, m_fullScore(0.0)
, m_futureScore(0.0)
, m_alignTerm(&AlignmentInfoCollection::Instance().GetEmptyAlignmentInfo())
, m_alignNonTerm(&AlignmentInfoCollection::Instance().GetEmptyAlignmentInfo())
, m_lhsTarget(NULL)
, m_ruleSource(NULL)
, m_container(pt)
{
}
TargetPhrase::TargetPhrase(const Phrase &phrase, const PhraseDictionary *pt)
: Phrase(phrase)
, m_fullScore(0.0)
, m_futureScore(0.0)
, m_alignTerm(&AlignmentInfoCollection::Instance().GetEmptyAlignmentInfo())
, m_alignNonTerm(&AlignmentInfoCollection::Instance().GetEmptyAlignmentInfo())
, m_lhsTarget(NULL)
, m_ruleSource(NULL)
, m_container(pt)
{
}
TargetPhrase::TargetPhrase(const TargetPhrase &copy)
: Phrase(copy)
, m_fullScore(copy.m_fullScore)
, m_futureScore(copy.m_futureScore)
, m_scoreBreakdown(copy.m_scoreBreakdown)
, m_alignTerm(copy.m_alignTerm)
, m_alignNonTerm(copy.m_alignNonTerm)
, m_container(copy.m_container)
{
if (copy.m_lhsTarget) {
m_lhsTarget = new Word(*copy.m_lhsTarget);
} else {
m_lhsTarget = NULL;
}
if (copy.m_ruleSource) {
m_ruleSource = new Phrase(*copy.m_ruleSource);
} else {
m_ruleSource = NULL;
}
}
TargetPhrase::~TargetPhrase()
{
//cerr << "m_lhsTarget=" << m_lhsTarget << endl;
delete m_lhsTarget;
delete m_ruleSource;
}
#ifdef HAVE_PROTOBUF
void TargetPhrase::WriteToRulePB(hgmert::Rule* pb) const
{
pb->add_trg_words("[X,1]");
for (size_t pos = 0 ; pos < GetSize() ; pos++)
pb->add_trg_words(GetWord(pos)[0]->GetString());
}
#endif
void TargetPhrase::EvaluateInIsolation(const Phrase &source)
{
const std::vector<FeatureFunction*> &ffs = FeatureFunction::GetFeatureFunctions();
EvaluateInIsolation(source, ffs);
}
void TargetPhrase::EvaluateInIsolation(const Phrase &source, const std::vector<FeatureFunction*> &ffs)
{
if (ffs.size()) {
const StaticData &staticData = StaticData::Instance();
ScoreComponentCollection futureScoreBreakdown;
for (size_t i = 0; i < ffs.size(); ++i) {
const FeatureFunction &ff = *ffs[i];
if (! staticData.IsFeatureFunctionIgnored( ff )) {
ff.EvaluateInIsolation(source, *this, m_scoreBreakdown, futureScoreBreakdown);
}
}
float weightedScore = m_scoreBreakdown.GetWeightedScore();
m_futureScore += futureScoreBreakdown.GetWeightedScore();
m_fullScore = weightedScore + m_futureScore;
}
}
void TargetPhrase::EvaluateWithSourceContext(const InputType &input, const InputPath &inputPath)
{
const std::vector<FeatureFunction*> &ffs = FeatureFunction::GetFeatureFunctions();
const StaticData &staticData = StaticData::Instance();
ScoreComponentCollection futureScoreBreakdown;
for (size_t i = 0; i < ffs.size(); ++i) {
const FeatureFunction &ff = *ffs[i];
if (! staticData.IsFeatureFunctionIgnored( ff )) {
ff.EvaluateWithSourceContext(input, inputPath, *this, NULL, m_scoreBreakdown, &futureScoreBreakdown);
}
}
float weightedScore = m_scoreBreakdown.GetWeightedScore();
m_futureScore += futureScoreBreakdown.GetWeightedScore();
m_fullScore = weightedScore + m_futureScore;
}
void TargetPhrase::SetXMLScore(float score)
{
const FeatureFunction* prod = PhraseDictionary::GetColl()[0];
size_t numScores = prod->GetNumScoreComponents();
vector <float> scoreVector(numScores,score/numScores);
m_scoreBreakdown.Assign(prod, scoreVector);
}
void TargetPhrase::SetAlignmentInfo(const StringPiece &alignString)
{
AlignmentInfo::CollType alignTerm, alignNonTerm;
for (util::TokenIter<util::AnyCharacter, true> token(alignString, util::AnyCharacter(" \t")); token; ++token) {
util::TokenIter<util::SingleCharacter, false> dash(*token, util::SingleCharacter('-'));
char *endptr;
size_t sourcePos = strtoul(dash->data(), &endptr, 10);
UTIL_THROW_IF(endptr != dash->data() + dash->size(), util::ErrnoException, "Error parsing alignment" << *dash);
++dash;
size_t targetPos = strtoul(dash->data(), &endptr, 10);
UTIL_THROW_IF(endptr != dash->data() + dash->size(), util::ErrnoException, "Error parsing alignment" << *dash);
UTIL_THROW_IF2(++dash, "Extra gunk in alignment " << *token);
if (GetWord(targetPos).IsNonTerminal()) {
alignNonTerm.insert(std::pair<size_t,size_t>(sourcePos, targetPos));
} else {
alignTerm.insert(std::pair<size_t,size_t>(sourcePos, targetPos));
}
}
SetAlignTerm(alignTerm);
SetAlignNonTerm(alignNonTerm);
}
void TargetPhrase::SetAlignTerm(const AlignmentInfo::CollType &coll)
{
const AlignmentInfo *alignmentInfo = AlignmentInfoCollection::Instance().Add(coll);
m_alignTerm = alignmentInfo;
}
void TargetPhrase::SetAlignNonTerm(const AlignmentInfo::CollType &coll)
{
const AlignmentInfo *alignmentInfo = AlignmentInfoCollection::Instance().Add(coll);
m_alignNonTerm = alignmentInfo;
}
void TargetPhrase::SetSparseScore(const FeatureFunction* translationScoreProducer, const StringPiece &sparseString)
{
m_scoreBreakdown.Assign(translationScoreProducer, sparseString.as_string());
}
void TargetPhrase::Merge(const TargetPhrase &copy, const std::vector<FactorType>& factorVec)
{
Phrase::MergeFactors(copy, factorVec);
m_scoreBreakdown.Merge(copy.GetScoreBreakdown());
m_futureScore += copy.m_futureScore;
m_fullScore += copy.m_fullScore;
}
void TargetPhrase::SetProperties(const StringPiece &str)
{
if (str.size() == 0) {
return;
}
vector<string> toks;
TokenizeMultiCharSeparator(toks, str.as_string(), "{{");
for (size_t i = 0; i < toks.size(); ++i) {
string &tok = toks[i];
if (tok.empty()) {
continue;
}
size_t endPos = tok.rfind("}");
tok = tok.substr(0, endPos - 1);
vector<string> keyValue = TokenizeFirstOnly(tok, " ");
UTIL_THROW_IF2(keyValue.size() != 2,
"Incorrect format of property: " << str);
SetProperty(keyValue[0], keyValue[1]);
}
}
void TargetPhrase::SetProperty(const std::string &key, const std::string &value)
{
const StaticData &staticData = StaticData::Instance();
const PhrasePropertyFactory& phrasePropertyFactory = staticData.GetPhrasePropertyFactory();
m_properties[key] = phrasePropertyFactory.ProduceProperty(key,value);
}
const PhraseProperty *TargetPhrase::GetProperty(const std::string &key) const
{
std::map<std::string, boost::shared_ptr<PhraseProperty> >::const_iterator iter;
iter = m_properties.find(key);
if (iter != m_properties.end()) {
const boost::shared_ptr<PhraseProperty> &pp = iter->second;
return pp.get();
}
return NULL;
}
void TargetPhrase::SetRuleSource(const Phrase &ruleSource) const
{
if (m_ruleSource == NULL) {
m_ruleSource = new Phrase(ruleSource);
}
}
void swap(TargetPhrase &first, TargetPhrase &second)
{
first.SwapWords(second);
std::swap(first.m_fullScore, second.m_fullScore);
std::swap(first.m_futureScore, second.m_futureScore);
swap(first.m_scoreBreakdown, second.m_scoreBreakdown);
std::swap(first.m_alignTerm, second.m_alignTerm);
std::swap(first.m_alignNonTerm, second.m_alignNonTerm);
std::swap(first.m_lhsTarget, second.m_lhsTarget);
}
TO_STRING_BODY(TargetPhrase);
std::ostream& operator<<(std::ostream& os, const TargetPhrase& tp)
{
if (tp.m_lhsTarget) {
os << *tp.m_lhsTarget<< " -> ";
}
os << static_cast<const Phrase&>(tp) << ":" << flush;
os << tp.GetAlignNonTerm() << flush;
os << ": c=" << tp.m_fullScore << flush;
os << " " << tp.m_scoreBreakdown << flush;
const Phrase *sourcePhrase = tp.GetRuleSource();
if (sourcePhrase) {
os << " sourcePhrase=" << *sourcePhrase << flush;
}
if (tp.m_properties.size()) {
os << " properties: " << flush;
TargetPhrase::Properties::const_iterator iter;
for (iter = tp.m_properties.begin(); iter != tp.m_properties.end(); ++iter) {
const string &key = iter->first;
const PhraseProperty *prop = iter->second.get();
assert(prop);
os << key << "=" << *prop << " ";
}
}
return os;
}
}