File size: 8,226 Bytes
158b61b |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 |
/***********************************************************************
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 "LoaderCompact.h"
#include "moses/AlignmentInfoCollection.h"
#include "moses/InputFileStream.h"
#include "moses/Util.h"
#include "moses/Timer.h"
#include "moses/Word.h"
#include "Trie.h"
#include <istream>
#include <sstream>
namespace Moses
{
bool RuleTableLoaderCompact::Load(AllOptions const& opts,
const std::vector<FactorType> &input,
const std::vector<FactorType> &output,
const std::string &inFile,
size_t /* tableLimit */,
RuleTableTrie &ruleTable)
{
PrintUserTime("Start loading compact rule table");
InputFileStream inStream(inFile);
LineReader reader(inStream);
// Read and check version number.
reader.ReadLine();
if (reader.m_line != "1") {
std::cerr << "Unexpected compact rule table format: " << reader.m_line;
return false;
}
// Load vocabulary.
std::vector<Word> vocab;
LoadVocabularySection(reader, input, vocab);
// Load source phrases.
std::vector<Phrase> sourcePhrases;
std::vector<size_t> sourceLhsIds;
LoadPhraseSection(reader, vocab, sourcePhrases, sourceLhsIds);
// Load target phrases.
std::vector<Phrase> targetPhrases;
std::vector<size_t> targetLhsIds;
LoadPhraseSection(reader, vocab, targetPhrases, targetLhsIds);
// Load alignments.
std::vector<const AlignmentInfo *> alignmentSets;
LoadAlignmentSection(reader, alignmentSets, sourcePhrases);
// Load rules.
if (!LoadRuleSection(reader, vocab, sourcePhrases, targetPhrases,
targetLhsIds, alignmentSets,
ruleTable)) {
return false;
}
// Sort and prune each target phrase collection.
SortAndPrune(ruleTable);
return true;
}
void RuleTableLoaderCompact::LoadVocabularySection(
LineReader &reader,
const std::vector<FactorType> &factorTypes,
std::vector<Word> &vocabulary)
{
// Read symbol count.
reader.ReadLine();
const size_t vocabSize = std::atoi(reader.m_line.c_str());
// Read symbol lines and create Word objects.
vocabulary.resize(vocabSize);
for (size_t i = 0; i < vocabSize; ++i) {
reader.ReadLine();
const size_t len = reader.m_line.size();
bool isNonTerm = (reader.m_line[0] == '[' && reader.m_line[len-1] == ']');
if (isNonTerm) {
reader.m_line = reader.m_line.substr(1, len-2);
}
vocabulary[i].CreateFromString(Input, factorTypes, reader.m_line, isNonTerm);
}
}
void RuleTableLoaderCompact::LoadPhraseSection(
LineReader &reader,
const std::vector<Word> &vocab,
std::vector<Phrase> &rhsPhrases,
std::vector<size_t> &lhsIds)
{
// Read phrase count.
reader.ReadLine();
const size_t phraseCount = std::atoi(reader.m_line.c_str());
// Reads lines, storing Phrase object for each RHS and vocab ID for each LHS.
rhsPhrases.resize(phraseCount, Phrase(0));
lhsIds.resize(phraseCount);
std::vector<size_t> tokenPositions;
for (size_t i = 0; i < phraseCount; ++i) {
reader.ReadLine();
tokenPositions.clear();
FindTokens(tokenPositions, reader.m_line);
const char *charLine = reader.m_line.c_str();
lhsIds[i] = std::atoi(charLine+tokenPositions[0]);
for (size_t j = 1; j < tokenPositions.size(); ++j) {
rhsPhrases[i].AddWord(vocab[std::atoi(charLine+tokenPositions[j])]);
}
}
}
void RuleTableLoaderCompact::LoadAlignmentSection(
LineReader &reader, std::vector<const AlignmentInfo *> &alignmentSets, std::vector<Phrase> &sourcePhrases)
{
// Read alignment set count.
reader.ReadLine();
const size_t alignmentSetCount = std::atoi(reader.m_line.c_str());
alignmentSets.resize(alignmentSetCount * 2);
AlignmentInfo::CollType alignTerm, alignNonTerm;
std::vector<std::string> tokens;
std::vector<size_t> points;
for (size_t i = 0; i < alignmentSetCount; ++i) {
// Read alignment set, lookup in collection, and store pointer.
alignTerm.clear();
alignNonTerm.clear();
tokens.clear();
reader.ReadLine();
Tokenize(tokens, reader.m_line);
std::vector<std::string>::const_iterator p;
for (p = tokens.begin(); p != tokens.end(); ++p) {
points.clear();
Tokenize<size_t>(points, *p, "-");
std::pair<size_t, size_t> alignmentPair(points[0], points[1]);
if (sourcePhrases[i].GetWord(alignmentPair.first).IsNonTerminal()) {
alignNonTerm.insert(alignmentPair);
} else {
alignTerm.insert(alignmentPair);
}
}
alignmentSets[i*2] = AlignmentInfoCollection::Instance().Add(alignNonTerm);
alignmentSets[i*2 + 1] = AlignmentInfoCollection::Instance().Add(alignTerm);
}
}
bool RuleTableLoaderCompact::LoadRuleSection(
LineReader &reader,
const std::vector<Word> &vocab,
const std::vector<Phrase> &sourcePhrases,
const std::vector<Phrase> &targetPhrases,
const std::vector<size_t> &targetLhsIds,
const std::vector<const AlignmentInfo *> &alignmentSets,
RuleTableTrie &ruleTable)
{
// Read rule count.
reader.ReadLine();
const size_t ruleCount = std::atoi(reader.m_line.c_str());
// Read rules and add to table.
const size_t numScoreComponents = ruleTable.GetNumScoreComponents();
std::vector<float> scoreVector(numScoreComponents);
std::vector<size_t> tokenPositions;
for (size_t i = 0; i < ruleCount; ++i) {
reader.ReadLine();
tokenPositions.clear();
FindTokens(tokenPositions, reader.m_line);
const char *charLine = reader.m_line.c_str();
// The first three tokens are IDs for the source phrase, target phrase,
// and alignment set.
const int sourcePhraseId = std::atoi(charLine+tokenPositions[0]);
const int targetPhraseId = std::atoi(charLine+tokenPositions[1]);
const int alignmentSetId = std::atoi(charLine+tokenPositions[2]);
const Phrase &sourcePhrase = sourcePhrases[sourcePhraseId];
const Phrase &targetPhrasePhrase = targetPhrases[targetPhraseId];
const Word *targetLhs = new Word(vocab[targetLhsIds[targetPhraseId]]);
Word sourceLHS("X"); // TODO not implemented for compact
const AlignmentInfo *alignNonTerm = alignmentSets[alignmentSetId];
// Then there should be one score for each score component.
for (size_t j = 0; j < numScoreComponents; ++j) {
float score = std::atof(charLine+tokenPositions[3+j]);
scoreVector[j] = FloorScore(TransformScore(score));
}
if (reader.m_line[tokenPositions[3+numScoreComponents]] != ':') {
std::cerr << "Size of scoreVector != number ("
<< scoreVector.size() << "!=" << numScoreComponents
<< ") of score components on line " << reader.m_lineNum;
return false;
}
// The remaining columns are currently ignored.
// Create and score target phrase.
TargetPhrase *targetPhrase = new TargetPhrase(targetPhrasePhrase, &ruleTable);
targetPhrase->SetAlignNonTerm(alignNonTerm);
targetPhrase->SetTargetLHS(targetLhs);
targetPhrase->EvaluateInIsolation(sourcePhrase, ruleTable.GetFeaturesToApply());
// Insert rule into table.
TargetPhraseCollection::shared_ptr coll;
coll = GetOrCreateTargetPhraseCollection(ruleTable, sourcePhrase,
*targetPhrase, &sourceLHS);
coll->Add(targetPhrase);
}
return true;
}
}
|