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#include "ExampleLM.h"
#include "moses/FactorCollection.h"
using namespace std;
namespace Moses
{
ExampleLM::ExampleLM(const std::string &line)
:LanguageModelSingleFactor(line)
{
ReadParameters();
UTIL_THROW_IF2(m_nGramOrder == NOT_FOUND, "Must set order");
UTIL_THROW_IF2(m_nGramOrder <= 1, "Ngram order must be more than 1");
FactorCollection &factorCollection = FactorCollection::Instance();
// needed by parent language model classes. Why didn't they set these themselves?
m_sentenceStart = factorCollection.AddFactor(Output, m_factorType, BOS_);
m_sentenceStartWord[m_factorType] = m_sentenceStart;
m_sentenceEnd = factorCollection.AddFactor(Output, m_factorType, EOS_);
m_sentenceEndWord[m_factorType] = m_sentenceEnd;
}
ExampleLM::~ExampleLM()
{
}
LMResult ExampleLM::GetValue(const vector<const Word*> &contextFactor, State* finalState) const
{
LMResult ret;
ret.score = contextFactor.size();
ret.unknown = false;
// use last word as state info
const Factor *factor;
size_t hash_value(const Factor &f);
if (contextFactor.size()) {
factor = contextFactor.back()->GetFactor(m_factorType);
} else {
factor = NULL;
}
(*finalState) = (State*) factor;
return ret;
}
}
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