mosesdecoder/moses/src/RuleTable/PhraseDictionaryNodeSCFG.cpp

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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 "PhraseDictionaryNodeSCFG.h"
#include "TargetPhrase.h"
#include "PhraseDictionary.h"

namespace Moses
{

PhraseDictionaryNodeSCFG::~PhraseDictionaryNodeSCFG()
{
  delete m_targetPhraseCollection;
}

void PhraseDictionaryNodeSCFG::Prune(size_t tableLimit)
{
  // recusively prune
  for (TerminalMap::iterator p = m_sourceTermMap.begin(); p != m_sourceTermMap.end(); ++p) {
    p->second.Prune(tableLimit);
  }
  for (NonTerminalMap::iterator p = m_nonTermMap.begin(); p != m_nonTermMap.end(); ++p) {
    p->second.Prune(tableLimit);
  }

  // prune TargetPhraseCollection in this node
  if (m_targetPhraseCollection != NULL)
    m_targetPhraseCollection->Prune(true, tableLimit);
}

void PhraseDictionaryNodeSCFG::Sort(size_t tableLimit)
{
  // recusively sort
  for (TerminalMap::iterator p = m_sourceTermMap.begin(); p != m_sourceTermMap.end(); ++p) {
    p->second.Sort(tableLimit);
  }
  for (NonTerminalMap::iterator p = m_nonTermMap.begin(); p != m_nonTermMap.end(); ++p) {
    p->second.Sort(tableLimit);
  }

  // prune TargetPhraseCollection in this node
  if (m_targetPhraseCollection != NULL) {
    m_targetPhraseCollection->Sort(true, tableLimit);
  }
}

PhraseDictionaryNodeSCFG *PhraseDictionaryNodeSCFG::GetOrCreateChild(const Word &sourceTerm)
{
  //CHECK(!sourceTerm.IsNonTerminal());

  std::pair <TerminalMap::iterator,bool> insResult;
  insResult = m_sourceTermMap.insert( std::make_pair(sourceTerm, PhraseDictionaryNodeSCFG()) );
  const TerminalMap::iterator &iter = insResult.first;
  PhraseDictionaryNodeSCFG &ret = iter->second;
  return &ret;
}

PhraseDictionaryNodeSCFG *PhraseDictionaryNodeSCFG::GetOrCreateChild(const Word &sourceNonTerm, const Word &targetNonTerm)
{
  CHECK(sourceNonTerm.IsNonTerminal());
  CHECK(targetNonTerm.IsNonTerminal());

  NonTerminalMapKey key(sourceNonTerm, targetNonTerm);
  std::pair <NonTerminalMap::iterator,bool> insResult;
  insResult = m_nonTermMap.insert( std::make_pair(key, PhraseDictionaryNodeSCFG()) );
  const NonTerminalMap::iterator &iter = insResult.first;
  PhraseDictionaryNodeSCFG &ret = iter->second;
  return &ret;
}

const PhraseDictionaryNodeSCFG *PhraseDictionaryNodeSCFG::GetChild(const Word &sourceTerm) const
{
  CHECK(!sourceTerm.IsNonTerminal());

  TerminalMap::const_iterator p = m_sourceTermMap.find(sourceTerm);
  return (p == m_sourceTermMap.end()) ? NULL : &p->second;
}

const PhraseDictionaryNodeSCFG *PhraseDictionaryNodeSCFG::GetChild(const Word &sourceNonTerm, const Word &targetNonTerm) const
{
  CHECK(sourceNonTerm.IsNonTerminal());
  CHECK(targetNonTerm.IsNonTerminal());

  NonTerminalMapKey key(sourceNonTerm, targetNonTerm);
  NonTerminalMap::const_iterator p = m_nonTermMap.find(key);
  return (p == m_nonTermMap.end()) ? NULL : &p->second;
}

void PhraseDictionaryNodeSCFG::Clear()
{
  m_sourceTermMap.clear();
  m_nonTermMap.clear();
  delete m_targetPhraseCollection;
  
}
  
std::ostream& operator<<(std::ostream &out, const PhraseDictionaryNodeSCFG &node)
{
  out << node.GetTargetPhraseCollection();
  return out;
}

TO_STRING_BODY(PhraseDictionaryNodeSCFG)

}

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