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/***********************************************************************
Moses - statistical machine translation system
Copyright (C) 2006-2011 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 "ScfgRuleWriter.h"
#include "Alignment.h"
#include "Options.h"
#include "ScfgRule.h"
#include <cassert>
#include <ostream>
#include <map>
#include <sstream>
#include <vector>
namespace Moses {
namespace GHKM {
void ScfgRuleWriter::Write(const ScfgRule &rule)
{
if (m_options.unpairedExtractFormat) {
WriteUnpairedFormat(rule);
} else {
WriteStandardFormat(rule);
}
}
void ScfgRuleWriter::WriteStandardFormat(const ScfgRule &rule)
{
const std::vector<Symbol> &sourceRHS = rule.GetSourceRHS();
const std::vector<Symbol> &targetRHS = rule.GetTargetRHS();
std::map<int, int> sourceToTargetNTMap;
std::map<int, int> targetToSourceNTMap;
const Alignment &alignment = rule.GetAlignment();
for (Alignment::const_iterator p(alignment.begin());
p != alignment.end(); ++p) {
if (sourceRHS[p->first].GetType() == NonTerminal) {
assert(targetRHS[p->second].GetType() == NonTerminal);
sourceToTargetNTMap[p->first] = p->second;
targetToSourceNTMap[p->second] = p->first;
}
}
std::ostringstream sourceSS;
std::ostringstream targetSS;
// Write the source side of the rule to sourceSS.
int i = 0;
for (std::vector<Symbol>::const_iterator p(sourceRHS.begin());
p != sourceRHS.end(); ++p, ++i) {
WriteSymbol(*p, sourceSS);
if (p->GetType() == NonTerminal) {
int targetIndex = sourceToTargetNTMap[i];
WriteSymbol(targetRHS[targetIndex], sourceSS);
}
sourceSS << " ";
}
WriteSymbol(rule.GetSourceLHS(), sourceSS);
// Write the target side of the rule to targetSS.
i = 0;
for (std::vector<Symbol>::const_iterator p(targetRHS.begin());
p != targetRHS.end(); ++p, ++i) {
if (p->GetType() == NonTerminal) {
int sourceIndex = targetToSourceNTMap[i];
WriteSymbol(sourceRHS[sourceIndex], targetSS);
}
WriteSymbol(*p, targetSS);
targetSS << " ";
}
WriteSymbol(rule.GetTargetLHS(), targetSS);
// Write the rule to the forward and inverse extract files.
m_fwd << sourceSS.str() << " ||| " << targetSS.str() << " |||";
m_inv << targetSS.str() << " ||| " << sourceSS.str() << " |||";
for (Alignment::const_iterator p(alignment.begin());
p != alignment.end(); ++p) {
m_fwd << " " << p->first << "-" << p->second;
m_inv << " " << p->second << "-" << p->first;
}
m_fwd << " ||| 1" << std::endl;
m_inv << " ||| 1" << std::endl;
}
void ScfgRuleWriter::WriteUnpairedFormat(const ScfgRule &rule)
{
const std::vector<Symbol> &sourceRHS = rule.GetSourceRHS();
const std::vector<Symbol> &targetRHS = rule.GetTargetRHS();
const Alignment &alignment = rule.GetAlignment();
std::ostringstream sourceSS;
std::ostringstream targetSS;
// Write the source side of the rule to sourceSS.
int i = 0;
for (std::vector<Symbol>::const_iterator p(sourceRHS.begin());
p != sourceRHS.end(); ++p, ++i) {
WriteSymbol(*p, sourceSS);
sourceSS << " ";
}
WriteSymbol(rule.GetSourceLHS(), sourceSS);
// Write the target side of the rule to targetSS.
i = 0;
for (std::vector<Symbol>::const_iterator p(targetRHS.begin());
p != targetRHS.end(); ++p, ++i) {
WriteSymbol(*p, targetSS);
targetSS << " ";
}
WriteSymbol(rule.GetTargetLHS(), targetSS);
// Write the rule to the forward and inverse extract files.
m_fwd << sourceSS.str() << " ||| " << targetSS.str() << " |||";
m_inv << targetSS.str() << " ||| " << sourceSS.str() << " |||";
for (Alignment::const_iterator p(alignment.begin());
p != alignment.end(); ++p) {
m_fwd << " " << p->first << "-" << p->second;
m_inv << " " << p->second << "-" << p->first;
}
m_fwd << " ||| 1" << std::endl;
m_inv << " ||| 1" << std::endl;
}
void ScfgRuleWriter::WriteSymbol(const Symbol &symbol, std::ostream &out)
{
if (symbol.GetType() == NonTerminal) {
out << "[" << symbol.GetValue() << "]";
} else {
out << symbol.GetValue();
}
}
} // namespace GHKM
} // namespace Moses
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