mosesdecoder/moses/Sentence.cpp
2015-05-02 11:45:24 +01:00

378 lines
12 KiB
C++

// $Id$
// vim:tabstop=2
/***********************************************************************
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 <stdexcept>
#include <boost/algorithm/string.hpp>
#include <boost/foreach.hpp>
#include "Sentence.h"
#include "TranslationOptionCollectionText.h"
#include "StaticData.h"
#include "moses/FF/DynamicCacheBasedLanguageModel.h"
#include "moses/TranslationModel/PhraseDictionaryDynamicCacheBased.h"
#include "ChartTranslationOptions.h"
#include "Util.h"
#include "XmlOption.h"
#include "FactorCollection.h"
using namespace std;
namespace Moses
{
Sentence::
Sentence() : Phrase(0) , InputType()
{
const StaticData& SD = StaticData::Instance();
if (SD.IsSyntax())
m_defaultLabelSet.insert(SD.GetInputDefaultNonTerminal());
}
Sentence::
~Sentence()
{
RemoveAllInColl(m_xmlOptions);
}
void
Sentence::
aux_init_partial_translation(string& line)
{
string sourceCompletedStr;
int loc1 = line.find( "|||", 0 );
int loc2 = line.find( "|||", loc1 + 3 );
if (loc1 > -1 && loc2 > -1) {
m_initialTargetPhrase = Trim(line.substr(0, loc1));
string scov = Trim(line.substr(loc1 + 3, loc2 - loc1 - 3));
line = line.substr(loc2 + 3);
m_sourceCompleted.resize(scov.size());
int contiguous = 1;
for (size_t i = 0; i < scov.size(); ++i) {
if (sourceCompletedStr.at(i) == '1') {
m_sourceCompleted[i] = true;
if (contiguous) m_frontSpanCoveredLength++;
} else {
m_sourceCompleted[i] = false;
contiguous = 0;
}
}
}
}
void
Sentence::
aux_interpret_sgml_markup(string& line)
{
// if sentences is specified as "<seg id=1> ... </seg>", extract id
typedef std::map<std::string, std::string> metamap;
metamap meta = ProcessAndStripSGML(line);
metamap::const_iterator i;
if ((i = meta.find("id")) != meta.end())
this->SetTranslationId(atol(i->second.c_str()));
if ((i = meta.find("docid")) != meta.end()) {
this->SetDocumentId(atol(i->second.c_str()));
this->SetUseTopicId(false);
this->SetUseTopicIdAndProb(false);
}
if ((i = meta.find("topic")) != meta.end()) {
vector<string> topic_params;
boost::split(topic_params, i->second, boost::is_any_of("\t "));
if (topic_params.size() == 1) {
this->SetTopicId(atol(topic_params[0].c_str()));
this->SetUseTopicId(true);
this->SetUseTopicIdAndProb(false);
} else {
this->SetTopicIdAndProb(topic_params);
this->SetUseTopicId(false);
this->SetUseTopicIdAndProb(true);
}
}
if ((i = meta.find("weight-setting")) != meta.end()) {
this->SetWeightSetting(i->second);
this->SetSpecifiesWeightSetting(true);
StaticData::Instance().SetWeightSetting(i->second);
// oh this is so horrible! Why does this have to be propagated globally?
// --- UG
} else this->SetSpecifiesWeightSetting(false);
}
void
Sentence::
aux_interpret_dlt(string& line) // whatever DLT means ... --- UG
{
using namespace std;
typedef map<string, string> str2str_map;
vector<str2str_map> meta = ProcessAndStripDLT(line);
BOOST_FOREACH(str2str_map const& M, meta) {
str2str_map::const_iterator i,j;
if ((i = M.find("type")) != M.end()) {
j = M.find("id");
string id = j == M.end() ? "default" : j->second;
if (i->second == "cbtm") {
PhraseDictionaryDynamicCacheBased* cbtm;
cbtm = PhraseDictionaryDynamicCacheBased::InstanceNonConst(id);
if (cbtm) cbtm->ExecuteDlt(M);
}
if (i->second == "cblm") {
DynamicCacheBasedLanguageModel* cblm;
cblm = DynamicCacheBasedLanguageModel::InstanceNonConst(id);
if (cblm) cblm->ExecuteDlt(M);
}
}
}
}
void
Sentence::
aux_interpret_xml(std::string& line, std::vector<size_t> & xmlWalls,
std::vector<std::pair<size_t, std::string> >& placeholders)
{
// parse XML markup in translation line
const StaticData &SD = StaticData::Instance();
using namespace std;
if (SD.GetXmlInputType() != XmlPassThrough) {
int offset = SD.IsSyntax() ? 1 : 0;
bool OK = ProcessAndStripXMLTags(line, m_xmlOptions,
m_reorderingConstraint,
xmlWalls, placeholders, offset,
SD.GetXmlBrackets().first,
SD.GetXmlBrackets().second);
UTIL_THROW_IF2(!OK, "Unable to parse XML in line: " << line);
}
}
void
Sentence::
init(string line, std::vector<FactorType> const& factorOrder)
{
using namespace std;
const StaticData &SD = StaticData::Instance();
m_frontSpanCoveredLength = 0;
m_sourceCompleted.resize(0);
if (SD.ContinuePartialTranslation())
aux_init_partial_translation(line);
line = Trim(line);
aux_interpret_sgml_markup(line); // for "<seg id=..." markup
aux_interpret_dlt(line); // some poorly documented cache-based stuff
// if sentences is specified as "<passthrough tag1=""/>"
if (SD.IsPassthroughEnabled() || SD.IsPassthroughInNBestEnabled()) {
string pthru = PassthroughSGML(line,"passthrough");
this->SetPassthroughInformation(pthru);
}
vector<size_t> xmlWalls;
vector<pair<size_t, string> >placeholders;
aux_interpret_xml(line, xmlWalls, placeholders);
Phrase::CreateFromString(Input, factorOrder, line, NULL);
ProcessPlaceholders(placeholders);
if (SD.IsSyntax()) InitStartEndWord();
// now that we have final word positions in phrase (from
// CreateFromString), we can make input phrase objects to go with
// our XmlOptions and create TranslationOptions
// only fill the vector if we are parsing XML
if (SD.GetXmlInputType() != XmlPassThrough) {
m_xmlCoverageMap.assign(GetSize(), false);
BOOST_FOREACH(XmlOption* o, m_xmlOptions) {
WordsRange const& r = o->range;
for(size_t j = r.GetStartPos(); j <= r.GetEndPos(); ++j)
m_xmlCoverageMap[j]=true;
}
}
// reordering walls and zones
m_reorderingConstraint.InitializeWalls(GetSize());
// set reordering walls, if "-monotone-at-punction" is set
if (SD.UseReorderingConstraint() && GetSize()) {
WordsRange r(0, GetSize()-1);
m_reorderingConstraint.SetMonotoneAtPunctuation(GetSubString(r));
}
// set walls obtained from xml
for(size_t i=0; i<xmlWalls.size(); i++)
if(xmlWalls[i] < GetSize()) // no buggy walls, please
m_reorderingConstraint.SetWall(xmlWalls[i], true);
m_reorderingConstraint.FinalizeWalls();
}
int
Sentence::
Read(std::istream& in,const std::vector<FactorType>& factorOrder)
{
std::string line;
if (getline(in, line, '\n').eof())
return 0;
init(line, factorOrder);
return 1;
}
void
Sentence::
ProcessPlaceholders(const std::vector< std::pair<size_t, std::string> > &placeholders)
{
FactorType placeholderFactor = StaticData::Instance().GetPlaceholderFactor();
if (placeholderFactor == NOT_FOUND) {
return;
}
for (size_t i = 0; i < placeholders.size(); ++i) {
size_t pos = placeholders[i].first;
const string &str = placeholders[i].second;
const Factor *factor = FactorCollection::Instance().AddFactor(str);
Word &word = Phrase::GetWord(pos);
word[placeholderFactor] = factor;
}
}
TranslationOptionCollection*
Sentence::
CreateTranslationOptionCollection(ttasksptr const& ttask) const
{
size_t maxNoTransOptPerCoverage = StaticData::Instance().GetMaxNoTransOptPerCoverage();
float transOptThreshold = StaticData::Instance().GetTranslationOptionThreshold();
TranslationOptionCollection *rv
= new TranslationOptionCollectionText(ttask, *this, maxNoTransOptPerCoverage,
transOptThreshold);
assert(rv);
return rv;
}
void Sentence::Print(std::ostream& out) const
{
out<<*static_cast<Phrase const*>(this);
}
bool Sentence::XmlOverlap(size_t startPos, size_t endPos) const
{
for (size_t pos = startPos; pos <= endPos ; pos++) {
if (pos < m_xmlCoverageMap.size() && m_xmlCoverageMap[pos]) {
return true;
}
}
return false;
}
void Sentence::GetXmlTranslationOptions(std::vector <TranslationOption*> &list) const
{
for (std::vector<XmlOption*>::const_iterator iterXMLOpts = m_xmlOptions.begin();
iterXMLOpts != m_xmlOptions.end(); ++iterXMLOpts) {
const XmlOption &xmlOption = **iterXMLOpts;
const WordsRange &range = xmlOption.range;
const TargetPhrase &targetPhrase = xmlOption.targetPhrase;
TranslationOption *transOpt = new TranslationOption(range, targetPhrase);
list.push_back(transOpt);
}
}
void Sentence::GetXmlTranslationOptions(std::vector <TranslationOption*> &list, size_t startPos, size_t endPos) const
{
//iterate over XmlOptions list, find exact source/target matches
for (std::vector<XmlOption*>::const_iterator iterXMLOpts = m_xmlOptions.begin();
iterXMLOpts != m_xmlOptions.end(); ++iterXMLOpts) {
const XmlOption &xmlOption = **iterXMLOpts;
const WordsRange &range = xmlOption.range;
if (startPos == range.GetStartPos()
&& endPos == range.GetEndPos()) {
const TargetPhrase &targetPhrase = xmlOption.targetPhrase;
TranslationOption *transOpt = new TranslationOption(range, targetPhrase);
list.push_back(transOpt);
}
}
}
std::vector <ChartTranslationOptions*> Sentence::GetXmlChartTranslationOptions() const
{
const StaticData &staticData = StaticData::Instance();
std::vector <ChartTranslationOptions*> ret;
// XML Options
// this code is a copy of the 1 in Sentence.
//only fill the vector if we are parsing XML
if (staticData.GetXmlInputType() != XmlPassThrough ) {
//TODO: needed to handle exclusive
//for (size_t i=0; i<GetSize(); i++) {
// m_xmlCoverageMap.push_back(false);
//}
//iterXMLOpts will be empty for XmlIgnore
//look at each column
for(std::vector<XmlOption*>::const_iterator iterXmlOpts = m_xmlOptions.begin();
iterXmlOpts != m_xmlOptions.end(); iterXmlOpts++) {
const XmlOption &xmlOption = **iterXmlOpts;
TargetPhrase *targetPhrase = new TargetPhrase(xmlOption.targetPhrase);
WordsRange *range = new WordsRange(xmlOption.range);
StackVec emptyStackVec; // hmmm... maybe dangerous, but it is never consulted
TargetPhraseCollection *tpc = new TargetPhraseCollection;
tpc->Add(targetPhrase);
ChartTranslationOptions *transOpt = new ChartTranslationOptions(*tpc, emptyStackVec, *range, 0.0f);
ret.push_back(transOpt);
//TODO: needed to handle exclusive
//for(size_t j=transOpt->GetSourceWordsRange().GetStartPos(); j<=transOpt->GetSourceWordsRange().GetEndPos(); j++) {
// m_xmlCoverageMap[j]=true;
//}
}
}
return ret;
}
void
Sentence::
CreateFromString(vector<FactorType> const& FOrder, string const& phraseString)
{
Phrase::CreateFromString(Input, FOrder, phraseString, NULL);
}
Sentence::
Sentence(size_t const transId, string const& stext,
vector<FactorType> const* IFO)
: InputType(transId)
{
if (IFO) init(stext, *IFO);
else init(stext, StaticData::Instance().GetInputFactorOrder());
}
}