mirror of
https://github.com/moses-smt/mosesdecoder.git
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561 lines
19 KiB
C++
561 lines
19 KiB
C++
/***********************************************************************
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Moses - factored phrase-based language decoder
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Copyright (C) 2009 University of Edinburgh
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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***********************************************************************/
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#include <sstream>
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#include "ExtractionPhrasePair.h"
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#include "tables-core.h"
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#include "score.h"
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#include "moses/Util.h"
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#include <cstdlib>
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using namespace std;
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namespace MosesTraining
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{
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extern Vocabulary vcbT;
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extern Vocabulary vcbS;
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extern bool hierarchicalFlag;
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ExtractionPhrasePair::ExtractionPhrasePair( const PHRASE *phraseSource,
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const PHRASE *phraseTarget,
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ALIGNMENT *targetToSourceAlignment,
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float count, float pcfgSum ) :
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m_phraseSource(phraseSource),
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m_phraseTarget(phraseTarget),
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m_count(count),
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m_pcfgSum(pcfgSum)
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{
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assert(!phraseSource->empty());
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m_count = count;
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m_pcfgSum = pcfgSum;
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std::pair< std::map<ALIGNMENT*,float>::iterator, bool > insertedAlignment =
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m_targetToSourceAlignments.insert( std::pair<ALIGNMENT*,float>(targetToSourceAlignment,count) );
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m_lastTargetToSourceAlignment = insertedAlignment.first;
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m_lastCount = m_count;
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m_lastPcfgSum = m_pcfgSum;
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m_isValid = true;
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}
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ExtractionPhrasePair::~ExtractionPhrasePair( )
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{
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Clear();
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}
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// return value: true if the given alignment was seen for the first time and thus will be stored,
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// false if it was present already (the pointer may thus be deleted(
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bool ExtractionPhrasePair::Add( ALIGNMENT *targetToSourceAlignment,
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float count, float pcfgSum )
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{
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m_count += count;
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m_pcfgSum += pcfgSum;
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m_lastCount = count;
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m_lastPcfgSum = pcfgSum;
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std::map<ALIGNMENT*,float>::iterator iter = m_lastTargetToSourceAlignment;
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if ( *(iter->first) == *targetToSourceAlignment ) {
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iter->second += count;
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return false;
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} else {
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std::pair< std::map<ALIGNMENT*,float>::iterator, bool > insertedAlignment =
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m_targetToSourceAlignments.insert( std::pair<ALIGNMENT*,float>(targetToSourceAlignment,count) );
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if ( !insertedAlignment.second ) {
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// the alignment already exists: increment count
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insertedAlignment.first->second += count;
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return false;
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}
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m_lastTargetToSourceAlignment = insertedAlignment.first;
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}
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return true;
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}
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void ExtractionPhrasePair::IncrementPrevious( float count, float pcfgSum )
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{
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m_count += count;
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m_pcfgSum += pcfgSum;
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m_lastTargetToSourceAlignment->second += count;
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// properties
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for ( std::map<std::string, std::pair< PROPERTY_VALUES*, LAST_PROPERTY_VALUE* > >::iterator iter=m_properties.begin();
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iter !=m_properties.end(); ++iter ) {
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LAST_PROPERTY_VALUE *lastPropertyValue = (iter->second).second;
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(*lastPropertyValue)->second += count;
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}
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m_lastCount = count;
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m_lastPcfgSum = pcfgSum;
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}
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// Check for lexical match
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// and in case of SCFG rules for equal non-terminal alignment.
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bool ExtractionPhrasePair::Matches( const PHRASE *otherPhraseSource,
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const PHRASE *otherPhraseTarget,
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ALIGNMENT *otherTargetToSourceAlignment ) const
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{
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if (*otherPhraseTarget != *m_phraseTarget) {
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return false;
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}
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if (*otherPhraseSource != *m_phraseSource) {
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return false;
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}
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return MatchesAlignment( otherTargetToSourceAlignment );
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}
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// Check for lexical match
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// and in case of SCFG rules for equal non-terminal alignment.
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// Set boolean indicators.
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// (Note that we check in the order: target - source - alignment
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// and do not touch the subsequent boolean indicators once a previous one has been set to false.)
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bool ExtractionPhrasePair::Matches( const PHRASE *otherPhraseSource,
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const PHRASE *otherPhraseTarget,
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ALIGNMENT *otherTargetToSourceAlignment,
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bool &sourceMatch,
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bool &targetMatch,
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bool &alignmentMatch ) const
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{
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if (*otherPhraseSource != *m_phraseSource) {
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sourceMatch = false;
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return false;
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} else {
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sourceMatch = true;
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}
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if (*otherPhraseTarget != *m_phraseTarget) {
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targetMatch = false;
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return false;
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} else {
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targetMatch = true;
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}
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if ( !MatchesAlignment(otherTargetToSourceAlignment) ) {
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alignmentMatch = false;
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return false;
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} else {
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alignmentMatch = true;
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}
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return true;
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}
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// Check for equal non-terminal alignment in case of SCFG rules.
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// Precondition: otherTargetToSourceAlignment has the same size as m_targetToSourceAlignments.begin()->first
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bool ExtractionPhrasePair::MatchesAlignment( ALIGNMENT *otherTargetToSourceAlignment ) const
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{
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if (!hierarchicalFlag) return true;
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// all or none of the phrasePair's word alignment matrices match, so just pick one
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const ALIGNMENT *thisTargetToSourceAlignment = m_targetToSourceAlignments.begin()->first;
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assert(m_phraseTarget->size() == thisTargetToSourceAlignment->size() + 1);
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assert(thisTargetToSourceAlignment->size() == otherTargetToSourceAlignment->size());
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// loop over all symbols but the left hand side of the rule
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for (size_t i=0; i<thisTargetToSourceAlignment->size()-1; ++i) {
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if (isNonTerminal( vcbT.getWord( m_phraseTarget->at(i) ) )) {
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size_t thisAlign = *(thisTargetToSourceAlignment->at(i).begin());
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size_t otherAlign = *(otherTargetToSourceAlignment->at(i).begin());
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if (thisTargetToSourceAlignment->at(i).size() != 1 ||
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otherTargetToSourceAlignment->at(i).size() != 1 ||
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thisAlign != otherAlign) {
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return false;
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}
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}
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}
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return true;
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}
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void ExtractionPhrasePair::Clear()
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{
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delete m_phraseSource;
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delete m_phraseTarget;
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m_count = 0.0f;
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m_pcfgSum = 0.0f;
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for ( std::map<ALIGNMENT*,float>::iterator iter=m_targetToSourceAlignments.begin();
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iter!=m_targetToSourceAlignments.end(); ++iter) {
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delete iter->first;
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}
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m_targetToSourceAlignments.clear();
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for ( std::map<std::string, std::pair< PROPERTY_VALUES*, LAST_PROPERTY_VALUE* > >::iterator iter=m_properties.begin();
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iter!=m_properties.end(); ++iter) {
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delete (iter->second).second;
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delete (iter->second).first;
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}
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m_properties.clear();
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m_lastCount = 0.0f;
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m_lastPcfgSum = 0.0f;
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m_lastTargetToSourceAlignment = m_targetToSourceAlignments.begin();
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m_isValid = false;
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}
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void ExtractionPhrasePair::AddProperties( const std::string &propertiesString, float count )
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{
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if (propertiesString.empty()) {
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return;
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}
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vector<std::string> toks;
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Moses::TokenizeMultiCharSeparator(toks, propertiesString, "{{");
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for (size_t i = 1; i < toks.size(); ++i) {
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std::string &tok = toks[i];
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if (tok.empty()) {
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continue;
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}
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size_t endPos = tok.rfind("}");
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tok = tok.substr(0, endPos - 1);
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vector<std::string> keyValue = Moses::TokenizeFirstOnly(tok, " ");
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assert(keyValue.size() == 2);
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AddProperty(keyValue[0], keyValue[1], count);
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}
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}
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const ALIGNMENT *ExtractionPhrasePair::FindBestAlignmentTargetToSource() const
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{
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float bestAlignmentCount = -1;
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std::map<ALIGNMENT*,float>::const_iterator bestAlignment = m_targetToSourceAlignments.end();
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for (std::map<ALIGNMENT*,float>::const_iterator iter=m_targetToSourceAlignments.begin();
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iter!=m_targetToSourceAlignments.end(); ++iter) {
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if ( (iter->second > bestAlignmentCount) ||
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( (iter->second == bestAlignmentCount) &&
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(*(iter->first) > *(bestAlignment->first)) ) ) {
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bestAlignmentCount = iter->second;
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bestAlignment = iter;
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}
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}
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if ( bestAlignment == m_targetToSourceAlignments.end()) {
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return NULL;
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}
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return bestAlignment->first;
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}
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const std::string *ExtractionPhrasePair::FindBestPropertyValue(const std::string &key) const
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{
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float bestPropertyCount = -1;
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const PROPERTY_VALUES *allPropertyValues = GetProperty( key );
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if ( allPropertyValues == NULL ) {
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return NULL;
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}
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PROPERTY_VALUES::const_iterator bestPropertyValue = allPropertyValues->end();
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for (PROPERTY_VALUES::const_iterator iter=allPropertyValues->begin();
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iter!=allPropertyValues->end(); ++iter) {
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if ( (iter->second > bestPropertyCount) ||
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( (iter->second == bestPropertyCount) &&
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(iter->first > bestPropertyValue->first) ) ) {
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bestPropertyCount = iter->second;
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bestPropertyValue = iter;
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}
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}
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if ( bestPropertyValue == allPropertyValues->end()) {
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return NULL;
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}
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return &(bestPropertyValue->first);
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}
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std::string ExtractionPhrasePair::CollectAllPropertyValues(const std::string &key) const
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{
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const PROPERTY_VALUES *allPropertyValues = GetProperty( key );
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if ( allPropertyValues == NULL ) {
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return "";
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}
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std::ostringstream oss;
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for (PROPERTY_VALUES::const_iterator iter=allPropertyValues->begin();
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iter!=allPropertyValues->end(); ++iter) {
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if (iter!=allPropertyValues->begin()) {
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oss << " ";
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}
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oss << iter->first;
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oss << " ";
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oss << iter->second;
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}
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std::string allPropertyValuesString(oss.str());
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return allPropertyValuesString;
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}
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std::string ExtractionPhrasePair::CollectAllLabelsSeparateLHSAndRHS(const std::string& propertyKey,
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std::set<std::string>& labelSet,
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boost::unordered_map<std::string,float>& countsLabelsLHS,
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boost::unordered_map<std::string, boost::unordered_map<std::string,float>* >& jointCountsRulesTargetLHSAndLabelsLHS,
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Vocabulary &vcbT) const
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{
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const PROPERTY_VALUES *allPropertyValues = GetProperty( propertyKey );
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if ( allPropertyValues == NULL ) {
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return "";
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}
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std::string lhs="", rhs="", currentRhs="";
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float currentRhsCount = 0.0;
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std::list< std::pair<std::string,float> > lhsGivenCurrentRhsCounts;
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std::ostringstream oss;
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for (PROPERTY_VALUES::const_iterator iter=allPropertyValues->begin();
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iter!=allPropertyValues->end(); ++iter) {
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size_t space = (iter->first).find_last_of(' ');
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if ( space == string::npos ) {
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lhs = iter->first;
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rhs.clear();
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} else {
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lhs = (iter->first).substr(space+1);
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rhs = (iter->first).substr(0,space);
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}
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labelSet.insert(lhs);
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if ( rhs.compare(currentRhs) ) {
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if ( iter!=allPropertyValues->begin() ) {
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if ( !currentRhs.empty() ) {
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istringstream tokenizer(currentRhs);
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std::string rhsLabel;
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while ( tokenizer.peek() != EOF ) {
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tokenizer >> rhsLabel;
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labelSet.insert(rhsLabel);
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}
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oss << " " << currentRhs << " " << currentRhsCount;
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}
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if ( lhsGivenCurrentRhsCounts.size() > 0 ) {
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if ( !currentRhs.empty() ) {
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oss << " " << lhsGivenCurrentRhsCounts.size();
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}
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for ( std::list< std::pair<std::string,float> >::const_iterator iter2=lhsGivenCurrentRhsCounts.begin();
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iter2!=lhsGivenCurrentRhsCounts.end(); ++iter2 ) {
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oss << " " << iter2->first << " " << iter2->second;
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// update countsLabelsLHS and jointCountsRulesTargetLHSAndLabelsLHS
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std::string ruleTargetLhs = vcbT.getWord(m_phraseTarget->back());
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ruleTargetLhs.erase(ruleTargetLhs.begin()); // strip square brackets
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ruleTargetLhs.erase(ruleTargetLhs.size()-1);
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std::pair< boost::unordered_map<std::string,float>::iterator, bool > insertedCountsLabelsLHS =
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countsLabelsLHS.insert(std::pair<std::string,float>(iter2->first,iter2->second));
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if (!insertedCountsLabelsLHS.second) {
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(insertedCountsLabelsLHS.first)->second += iter2->second;
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}
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boost::unordered_map<std::string, boost::unordered_map<std::string,float>* >::iterator jointCountsRulesTargetLHSAndLabelsLHSIter =
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jointCountsRulesTargetLHSAndLabelsLHS.find(ruleTargetLhs);
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if ( jointCountsRulesTargetLHSAndLabelsLHSIter == jointCountsRulesTargetLHSAndLabelsLHS.end() ) {
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boost::unordered_map<std::string,float>* jointCounts = new boost::unordered_map<std::string,float>;
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jointCounts->insert(std::pair<std::string,float>(iter2->first,iter2->second));
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jointCountsRulesTargetLHSAndLabelsLHS.insert(std::pair<std::string,boost::unordered_map<std::string,float>* >(ruleTargetLhs,jointCounts));
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} else {
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boost::unordered_map<std::string,float>* jointCounts = jointCountsRulesTargetLHSAndLabelsLHSIter->second;
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std::pair< boost::unordered_map<std::string,float>::iterator, bool > insertedJointCounts =
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jointCounts->insert(std::pair<std::string,float>(iter2->first,iter2->second));
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if (!insertedJointCounts.second) {
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(insertedJointCounts.first)->second += iter2->second;
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}
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}
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}
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}
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lhsGivenCurrentRhsCounts.clear();
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}
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currentRhsCount = 0.0;
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currentRhs = rhs;
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}
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currentRhsCount += iter->second;
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lhsGivenCurrentRhsCounts.push_back( std::pair<std::string,float>(lhs,iter->second) );
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}
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if ( !currentRhs.empty() ) {
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istringstream tokenizer(currentRhs);
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std::string rhsLabel;
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while ( tokenizer.peek() != EOF ) {
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tokenizer >> rhsLabel;
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labelSet.insert(rhsLabel);
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}
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oss << " " << currentRhs << " " << currentRhsCount;
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}
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if ( lhsGivenCurrentRhsCounts.size() > 0 ) {
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if ( !currentRhs.empty() ) {
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oss << " " << lhsGivenCurrentRhsCounts.size();
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}
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for ( std::list< std::pair<std::string,float> >::const_iterator iter2=lhsGivenCurrentRhsCounts.begin();
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iter2!=lhsGivenCurrentRhsCounts.end(); ++iter2 ) {
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oss << " " << iter2->first << " " << iter2->second;
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// update countsLabelsLHS and jointCountsRulesTargetLHSAndLabelsLHS
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std::string ruleTargetLhs = vcbT.getWord(m_phraseTarget->back());
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ruleTargetLhs.erase(ruleTargetLhs.begin()); // strip square brackets
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ruleTargetLhs.erase(ruleTargetLhs.size()-1);
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std::pair< boost::unordered_map<std::string,float>::iterator, bool > insertedCountsLabelsLHS =
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countsLabelsLHS.insert(std::pair<std::string,float>(iter2->first,iter2->second));
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if (!insertedCountsLabelsLHS.second) {
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(insertedCountsLabelsLHS.first)->second += iter2->second;
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}
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boost::unordered_map<std::string, boost::unordered_map<std::string,float>* >::iterator jointCountsRulesTargetLHSAndLabelsLHSIter =
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jointCountsRulesTargetLHSAndLabelsLHS.find(ruleTargetLhs);
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if ( jointCountsRulesTargetLHSAndLabelsLHSIter == jointCountsRulesTargetLHSAndLabelsLHS.end() ) {
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boost::unordered_map<std::string,float>* jointCounts = new boost::unordered_map<std::string,float>;
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jointCounts->insert(std::pair<std::string,float>(iter2->first,iter2->second));
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jointCountsRulesTargetLHSAndLabelsLHS.insert(std::pair<std::string,boost::unordered_map<std::string,float>* >(ruleTargetLhs,jointCounts));
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} else {
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boost::unordered_map<std::string,float>* jointCounts = jointCountsRulesTargetLHSAndLabelsLHSIter->second;
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std::pair< boost::unordered_map<std::string,float>::iterator, bool > insertedJointCounts =
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jointCounts->insert(std::pair<std::string,float>(iter2->first,iter2->second));
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if (!insertedJointCounts.second) {
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(insertedJointCounts.first)->second += iter2->second;
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}
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}
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}
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}
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std::string allPropertyValuesString(oss.str());
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return allPropertyValuesString;
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}
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void ExtractionPhrasePair::CollectAllPhraseOrientations(const std::string &key,
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const std::vector<float> &orientationClassPriorsL2R,
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const std::vector<float> &orientationClassPriorsR2L,
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double smoothingFactor,
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std::ostream &out) const
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{
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assert(orientationClassPriorsL2R.size()==4 && orientationClassPriorsR2L.size()==4); // mono swap dleft dright
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const PROPERTY_VALUES *allPropertyValues = GetProperty( key );
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if ( allPropertyValues == NULL ) {
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return;
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}
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// bidirectional MSLR phrase orientation with 2x4 orientation classes:
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// mono swap dright dleft
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std::vector<float> orientationClassCountSumL2R(4,0);
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std::vector<float> orientationClassCountSumR2L(4,0);
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for (PROPERTY_VALUES::const_iterator iter=allPropertyValues->begin();
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iter!=allPropertyValues->end(); ++iter) {
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std::string l2rOrientationClass, r2lOrientationClass;
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try {
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istringstream tokenizer(iter->first);
|
|
tokenizer >> l2rOrientationClass;
|
|
tokenizer >> r2lOrientationClass;
|
|
if ( tokenizer.peek() != EOF ) {
|
|
UTIL_THROW(util::Exception, "ExtractionPhrasePair"
|
|
<< ": Collecting phrase orientations failed. "
|
|
<< "Too many tokens?");
|
|
}
|
|
} catch (const std::exception &e) {
|
|
UTIL_THROW(util::Exception, "ExtractionPhrasePair"
|
|
<< ": Collecting phrase orientations failed. "
|
|
<< "Flawed property value in extract file?");
|
|
}
|
|
|
|
int l2rOrientationClassId = -1;
|
|
if (!l2rOrientationClass.compare("mono")) {
|
|
l2rOrientationClassId = 0;
|
|
}
|
|
if (!l2rOrientationClass.compare("swap")) {
|
|
l2rOrientationClassId = 1;
|
|
}
|
|
if (!l2rOrientationClass.compare("dleft")) {
|
|
l2rOrientationClassId = 2;
|
|
}
|
|
if (!l2rOrientationClass.compare("dright")) {
|
|
l2rOrientationClassId = 3;
|
|
}
|
|
if (l2rOrientationClassId == -1) {
|
|
UTIL_THROW(util::Exception, "ExtractionPhrasePair"
|
|
<< ": Collecting phrase orientations failed. "
|
|
<< "Unknown orientation class \"" << l2rOrientationClass << "\"." );
|
|
}
|
|
int r2lOrientationClassId = -1;
|
|
if (!r2lOrientationClass.compare("mono")) {
|
|
r2lOrientationClassId = 0;
|
|
}
|
|
if (!r2lOrientationClass.compare("swap")) {
|
|
r2lOrientationClassId = 1;
|
|
}
|
|
if (!r2lOrientationClass.compare("dleft")) {
|
|
r2lOrientationClassId = 2;
|
|
}
|
|
if (!r2lOrientationClass.compare("dright")) {
|
|
r2lOrientationClassId = 3;
|
|
}
|
|
if (r2lOrientationClassId == -1) {
|
|
UTIL_THROW(util::Exception, "ExtractionPhrasePair"
|
|
<< ": Collecting phrase orientations failed. "
|
|
<< "Unknown orientation class \"" << r2lOrientationClass << "\"." );
|
|
}
|
|
|
|
orientationClassCountSumL2R[l2rOrientationClassId] += iter->second;
|
|
orientationClassCountSumR2L[r2lOrientationClassId] += iter->second;
|
|
}
|
|
|
|
for (size_t i=0; i<4; ++i) {
|
|
if (i>0) {
|
|
out << " ";
|
|
}
|
|
out << (float)( (smoothingFactor*orientationClassPriorsL2R[i] + orientationClassCountSumL2R[i]) / (smoothingFactor + m_count) );
|
|
}
|
|
for (size_t i=0; i<4; ++i) {
|
|
out << " " << (float)( (smoothingFactor*orientationClassPriorsR2L[i] + orientationClassCountSumR2L[i]) / (smoothingFactor + m_count) );
|
|
}
|
|
}
|
|
|
|
|
|
|
|
}
|
|
|