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#include "TranslationRequest.h"
#include "moses/ContextScope.h"
#include <boost/foreach.hpp>
namespace MosesServer
{
using namespace std;
using Moses::Hypothesis;
using Moses::StaticData;
using Moses::WordsRange;
using Moses::ChartHypothesis;
using Moses::Phrase;
using Moses::Manager;
using Moses::SearchGraphNode;
using Moses::TrellisPathList;
using Moses::TranslationOptionCollection;
using Moses::TranslationOptionList;
using Moses::TranslationOption;
using Moses::TargetPhrase;
using Moses::FValue;
using Moses::PhraseDictionaryMultiModel;
using Moses::FindPhraseDictionary;
using Moses::Sentence;
boost::shared_ptr<TranslationRequest>
TranslationRequest::
create(xmlrpc_c::paramList const& paramList,
boost::condition_variable& cond,
boost::mutex& mut)
{
boost::shared_ptr<TranslationRequest> ret;
ret.reset(new TranslationRequest(paramList,cond, mut));
ret->m_self = ret;
ret->m_scope.reset(new Moses::ContextScope);
return ret;
}
void
TranslationRequest::
Run()
{
parse_request(m_paramList.getStruct(0));
Moses::StaticData const& SD = Moses::StaticData::Instance();
//Make sure alternative paths are retained, if necessary
if (m_withGraphInfo || m_nbestSize>0)
// why on earth is this a global variable? Is this even thread-safe???? UG
(const_cast<Moses::StaticData&>(SD)).SetOutputSearchGraph(true);
std::stringstream out, graphInfo, transCollOpts;
if (SD.IsSyntax())
run_chart_decoder();
else
run_phrase_decoder();
XVERBOSE(1,"Output: " << out.str() << endl);
{
boost::lock_guard<boost::mutex> lock(m_mutex);
m_done = true;
}
m_cond.notify_one();
}
/// add phrase alignment information from a Hypothesis
void
TranslationRequest::
add_phrase_aln_info(Hypothesis const& h, vector<xmlrpc_c::value>& aInfo) const
{
if (!m_withAlignInfo) return;
WordsRange const& trg = h.GetCurrTargetWordsRange();
WordsRange const& src = h.GetCurrSourceWordsRange();
std::map<std::string, xmlrpc_c::value> pAlnInfo;
pAlnInfo["tgt-start"] = xmlrpc_c::value_int(trg.GetStartPos());
pAlnInfo["src-start"] = xmlrpc_c::value_int(src.GetStartPos());
pAlnInfo["src-end"] = xmlrpc_c::value_int(src.GetEndPos());
aInfo.push_back(xmlrpc_c::value_struct(pAlnInfo));
}
void
TranslationRequest::
outputChartHypo(ostream& out, const ChartHypothesis* hypo)
{
Phrase outPhrase(20);
hypo->GetOutputPhrase(outPhrase);
// delete 1st & last
assert(outPhrase.GetSize() >= 2);
outPhrase.RemoveWord(0);
outPhrase.RemoveWord(outPhrase.GetSize() - 1);
for (size_t pos = 0 ; pos < outPhrase.GetSize() ; pos++)
out << *outPhrase.GetFactor(pos, 0) << " ";
}
bool
TranslationRequest::
compareSearchGraphNode(const Moses::SearchGraphNode& a,
const Moses::SearchGraphNode& b)
{
return a.hypo->GetId() < b.hypo->GetId();
}
void
TranslationRequest::
insertGraphInfo(Manager& manager, map<string, xmlrpc_c::value>& retData)
{
using xmlrpc_c::value_int;
using xmlrpc_c::value_double;
using xmlrpc_c::value_struct;
using xmlrpc_c::value_string;
vector<xmlrpc_c::value> searchGraphXml;
vector<SearchGraphNode> searchGraph;
manager.GetSearchGraph(searchGraph);
std::sort(searchGraph.begin(), searchGraph.end());
BOOST_FOREACH(Moses::SearchGraphNode const& n, searchGraph) {
map<string, xmlrpc_c::value> x; // search graph xml node
x["forward"] = value_double(n.forward);
x["fscore"] = value_double(n.fscore);
const Hypothesis* hypo = n.hypo;
x["hyp"] = value_int(hypo->GetId());
x["stack"] = value_int(hypo->GetWordsBitmap().GetNumWordsCovered());
if (hypo->GetId() != 0) {
const Hypothesis *prevHypo = hypo->GetPrevHypo();
x["back"] = value_int(prevHypo->GetId());
x["score"] = value_double(hypo->GetScore());
x["transition"] = value_double(hypo->GetScore() - prevHypo->GetScore());
if (n.recombinationHypo)
x["recombined"] = value_int(n.recombinationHypo->GetId());
x["cover-start"] = value_int(hypo->GetCurrSourceWordsRange().GetStartPos());
x["cover-end"] = value_int(hypo->GetCurrSourceWordsRange().GetEndPos());
x["out"] = value_string(hypo->GetCurrTargetPhrase().GetStringRep(StaticData::Instance().GetOutputFactorOrder()));
}
searchGraphXml.push_back(value_struct(x));
}
retData["sg"] = xmlrpc_c::value_array(searchGraphXml);
}
void
TranslationRequest::
output_phrase(ostream& out, Phrase const& phrase) const
{
if (!m_reportAllFactors) {
for (size_t i = 0 ; i < phrase.GetSize(); ++i)
out << *phrase.GetFactor(i, 0) << " ";
} else out << phrase;
}
void
TranslationRequest::
outputNBest(const Manager& manager, map<string, xmlrpc_c::value>& retData)
{
TrellisPathList nBestList;
vector<xmlrpc_c::value> nBestXml;
manager.CalcNBest(m_nbestSize, nBestList, m_nbestDistinct);
BOOST_FOREACH(Moses::TrellisPath const* path, nBestList) {
vector<const Hypothesis *> const& E = path->GetEdges();
if (!E.size()) continue;
std::map<std::string, xmlrpc_c::value> nBestXmlItem;
pack_hypothesis(E, "hyp", nBestXmlItem);
if (m_withScoreBreakdown) {
// should the score breakdown be reported in a more structured manner?
ostringstream buf;
path->GetScoreBreakdown()->OutputAllFeatureScores(buf);
nBestXmlItem["fvals"] = xmlrpc_c::value_string(buf.str());
}
// weighted score
nBestXmlItem["totalScore"] = xmlrpc_c::value_double(path->GetTotalScore());
nBestXml.push_back(xmlrpc_c::value_struct(nBestXmlItem));
}
retData["nbest"] = xmlrpc_c::value_array(nBestXml);
}
void
TranslationRequest::
insertTranslationOptions(Moses::Manager& manager,
std::map<std::string, xmlrpc_c::value>& retData)
{
const TranslationOptionCollection* toptsColl
= manager.getSntTranslationOptions();
vector<xmlrpc_c::value> toptsXml;
size_t const stop = toptsColl->GetSource().GetSize();
TranslationOptionList const* tol;
for (size_t s = 0 ; s < stop ; ++s) {
for (size_t e = s;
(tol = toptsColl->GetTranslationOptionList(s,e)) != NULL;
++e) {
BOOST_FOREACH(TranslationOption const* topt, *tol) {
std::map<std::string, xmlrpc_c::value> toptXml;
TargetPhrase const& tp = topt->GetTargetPhrase();
StaticData const& GLOBAL = StaticData::Instance();
std::string tphrase = tp.GetStringRep(GLOBAL.GetOutputFactorOrder());
toptXml["phrase"] = xmlrpc_c::value_string(tphrase);
toptXml["fscore"] = xmlrpc_c::value_double(topt->GetFutureScore());
toptXml["start"] = xmlrpc_c::value_int(s);
toptXml["end"] = xmlrpc_c::value_int(e);
vector<xmlrpc_c::value> scoresXml;
const std::valarray<FValue> &scores
= topt->GetScoreBreakdown().getCoreFeatures();
for (size_t j = 0; j < scores.size(); ++j)
scoresXml.push_back(xmlrpc_c::value_double(scores[j]));
toptXml["scores"] = xmlrpc_c::value_array(scoresXml);
toptsXml.push_back(xmlrpc_c::value_struct(toptXml));
}
}
}
retData["topt"] = xmlrpc_c::value_array(toptsXml);
}
bool
check(std::map<std::string, xmlrpc_c::value> const& params, std::string const key)
{
std::map<std::string, xmlrpc_c::value>::const_iterator m;
return (params.find(key) != params.end());
}
TranslationRequest::
TranslationRequest(xmlrpc_c::paramList const& paramList,
boost::condition_variable& cond, boost::mutex& mut)
: m_cond(cond), m_mutex(mut), m_done(false), m_paramList(paramList)
, m_nbestSize(0)
{ }
void
TranslationRequest::
parse_request(std::map<std::string, xmlrpc_c::value> const& params)
{
// parse XMLRPC request
// params_t const params = m_paramList.getStruct(0);
m_paramList.verifyEnd(1); // ??? UG
// source text must be given, or we don't know what to translate
typedef std::map<std::string, xmlrpc_c::value> params_t;
params_t::const_iterator si = params.find("text");
if (si == params.end())
throw xmlrpc_c::fault("Missing source text", xmlrpc_c::fault::CODE_PARSE);
m_source_string = xmlrpc_c::value_string(si->second);
XVERBOSE(1,"Input: " << m_source_string << endl);
m_withAlignInfo = check(params, "align");
m_withWordAlignInfo = check(params, "word-align");
m_withGraphInfo = check(params, "sg");
m_withTopts = check(params, "topt");
m_reportAllFactors = check(params, "report-all-factors");
m_nbestDistinct = check(params, "nbest-distinct");
m_withScoreBreakdown = check(params, "add-score-breakdown");
m_source.reset(new Sentence(0,m_source_string));
si = params.find("lambda");
if (si != params.end()) {
// muMo = multiModel
xmlrpc_c::value_array muMoArray = xmlrpc_c::value_array(si->second);
vector<xmlrpc_c::value> muMoValVec(muMoArray.vectorValueValue());
vector<float> w(muMoValVec.size());
for (size_t i = 0; i < muMoValVec.size(); ++i)
w[i] = xmlrpc_c::value_double(muMoValVec[i]);
if (w.size() && (si = params.find("model_name")) != params.end()) {
string const model_name = xmlrpc_c::value_string(si->second);
PhraseDictionaryMultiModel* pdmm
= (PhraseDictionaryMultiModel*) FindPhraseDictionary(model_name);
// Moses::PhraseDictionaryMultiModel* pdmm
// = FindPhraseDictionary(model_name);
pdmm->SetTemporaryMultiModelWeightsVector(w);
}
}
si = params.find("nbest");
if (si != params.end())
m_nbestSize = xmlrpc_c::value_int(si->second);
si = params.find("context");
if (si != params.end()) {
m_context_string = xmlrpc_c::value_string(si->second);
}
// // biased sampling for suffix-array-based sampling phrase table?
// if ((si = params.find("bias")) != params.end())
// {
// std::vector<xmlrpc_c::value> tmp
// = xmlrpc_c::value_array(si->second).cvalue();
// for (size_t i = 1; i < tmp.size(); i += 2)
// m_bias[xmlrpc_c::value_int(tmp[i-1])] = xmlrpc_c::value_double(tmp[i]);
// }
} // end of Translationtask::parse_request()
void
TranslationRequest::
run_chart_decoder()
{
Moses::TreeInput tinput;
istringstream buf(m_source_string + "\n");
tinput.Read(buf, StaticData::Instance().GetInputFactorOrder());
Moses::ChartManager manager(this->self());
manager.Decode();
const Moses::ChartHypothesis *hypo = manager.GetBestHypothesis();
ostringstream out;
outputChartHypo(out,hypo);
m_target_string = out.str();
m_retData["text"] = xmlrpc_c::value_string(m_target_string);
if (m_withGraphInfo) {
std::ostringstream sgstream;
manager.OutputSearchGraphMoses(sgstream);
m_retData["sg"] = xmlrpc_c::value_string(sgstream.str());
}
} // end of TranslationRequest::run_chart_decoder()
void
TranslationRequest::
pack_hypothesis(vector<Hypothesis const* > const& edges, string const& key,
map<string, xmlrpc_c::value> & dest) const
{
// target string
ostringstream target;
BOOST_REVERSE_FOREACH(Hypothesis const* e, edges)
output_phrase(target, e->GetCurrTargetPhrase());
dest[key] = xmlrpc_c::value_string(target.str());
if (m_withAlignInfo) {
// phrase alignment, if requested
vector<xmlrpc_c::value> p_aln;
BOOST_REVERSE_FOREACH(Hypothesis const* e, edges)
add_phrase_aln_info(*e, p_aln);
dest["align"] = xmlrpc_c::value_array(p_aln);
}
if (m_withWordAlignInfo) {
// word alignment, if requested
vector<xmlrpc_c::value> w_aln;
BOOST_FOREACH(Hypothesis const* e, edges)
e->OutputLocalWordAlignment(w_aln);
dest["word-align"] = xmlrpc_c::value_array(w_aln);
}
}
void
TranslationRequest::
pack_hypothesis(Hypothesis const* h, string const& key,
map<string, xmlrpc_c::value>& dest) const
{
using namespace std;
vector<Hypothesis const*> edges;
for (; h; h = h->GetPrevHypo())
edges.push_back(h);
pack_hypothesis(edges, key, dest);
}
void
TranslationRequest::
run_phrase_decoder()
{
Manager manager(this->self());
// if (m_bias.size()) manager.SetBias(&m_bias);
manager.Decode();
pack_hypothesis(manager.GetBestHypothesis(), "text", m_retData);
if (m_withGraphInfo) insertGraphInfo(manager,m_retData);
if (m_withTopts) insertTranslationOptions(manager,m_retData);
if (m_nbestSize) outputNBest(manager, m_retData);
(const_cast<StaticData&>(Moses::StaticData::Instance()))
.SetOutputSearchGraph(false);
// WTF? one more reason not to have this as global variable! --- UG
}
}
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