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// $Id$
/***********************************************************************
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 "LanguageModelFactory.h"
#include "UserMessage.h"
#include "TypeDef.h"
#include "FactorCollection.h"
// include appropriate header
#ifdef LM_SRI
# include "LanguageModelSRI.h"
#endif
#ifdef LM_IRST
# include "LanguageModelIRST.h"
#endif
#include "LanguageModelInternal.h"
#include "LanguageModelSkip.h"
#include "LanguageModelJoint.h"
namespace LanguageModelFactory
{
LanguageModel* CreateLanguageModel(LMImplementation lmImplementation
, const std::vector<FactorType> &factorTypes
, size_t nGramOrder
, const std::string &languageModelFile
, float weight
, ScoreIndexManager &scoreIndexManager)
{
LanguageModel *lm = NULL;
switch (lmImplementation)
{
case SRI:
#ifdef LM_SRI
lm = new LanguageModelSRI(true, scoreIndexManager);
#elif LM_INTERNAL
lm = new LanguageModelInternal(true, scoreIndexManager);
#endif
break;
case IRST:
#ifdef LM_IRST
lm = new LanguageModelIRST(true, scoreIndexManager);
#endif
break;
case Skip:
#ifdef LM_SRI
lm = new LanguageModelSkip(new LanguageModelSRI(false, scoreIndexManager)
, true
, scoreIndexManager);
#elif LM_INTERNAL
lm = new LanguageModelSkip(new LanguageModelInternal(false, scoreIndexManager)
, true
, scoreIndexManager);
#endif
break;
case Joint:
#ifdef LM_SRI
lm = new LanguageModelJoint(new LanguageModelSRI(false, scoreIndexManager)
, true
, scoreIndexManager);
#elif LM_INTERNAL
lm = new LanguageModelJoint(new LanguageModelInternal(false, scoreIndexManager)
, true
, scoreIndexManager);
#endif
break;
case Internal:
#ifdef LM_INTERNAL
lm = new LanguageModelInternal(true, scoreIndexManager);
#endif
break;
}
if (lm == NULL)
{
UserMessage::Add("Language model type unknown. Probably not compiled into library");
}
else
{
switch (lm->GetLMType())
{
case SingleFactor:
if (! static_cast<LanguageModelSingleFactor*>(lm)->Load(languageModelFile, factorTypes[0], weight, nGramOrder))
{
delete lm;
lm = NULL;
}
break;
case MultiFactor:
if (! static_cast<LanguageModelMultiFactor*>(lm)->Load(languageModelFile, factorTypes, weight, nGramOrder))
{
delete lm;
lm = NULL;
}
break;
}
}
return lm;
}
}
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