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/***********************************************************************
Moses - statistical machine translation system
Copyright (C) 2006-2012 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 "pcfg_extract.h"
#include "options.h"
#include "rule_collection.h"
#include "rule_extractor.h"
#include "syntax-common/exception.h"
#include "pcfg-common/pcfg.h"
#include "pcfg-common/pcfg_tree.h"
#include "pcfg-common/syntax_tree.h"
#include "pcfg-common/typedef.h"
#include "pcfg-common/xml_tree_parser.h"
#include <boost/program_options.hpp>
#include <cassert>
#include <cstdlib>
#include <fstream>
#include <iostream>
#include <map>
#include <memory>
#include <set>
#include <string>
#include <vector>
namespace MosesTraining
{
namespace Syntax
{
namespace PCFG
{
int PcfgExtract::Main(int argc, char *argv[])
{
// Process command-line options.
Options options;
ProcessOptions(argc, argv, options);
// Extract PCFG rules from corpus.
Vocabulary non_term_vocab;
RuleExtractor rule_extractor(non_term_vocab);
RuleCollection rule_collection;
XmlTreeParser parser;
std::string line;
std::size_t line_num = 0;
std::auto_ptr<PcfgTree> tree;
while (std::getline(std::cin, line)) {
++line_num;
try {
tree = parser.Parse(line);
} catch (Exception &e) {
std::ostringstream msg;
msg << "line " << line_num << ": " << e.msg();
Error(msg.str());
}
if (!tree.get()) {
std::ostringstream msg;
msg << "no tree at line " << line_num;
Warn(msg.str());
continue;
}
rule_extractor.Extract(*tree, rule_collection);
}
// Score rules and write PCFG to output.
Pcfg pcfg;
rule_collection.CreatePcfg(pcfg);
pcfg.Write(non_term_vocab, std::cout);
return 0;
}
void PcfgExtract::ProcessOptions(int argc, char *argv[],
Options &options) const
{
namespace po = boost::program_options;
std::ostringstream usage_top;
usage_top << "Usage: " << name() << "\n\n" << "Options";
// Declare the command line options that are visible to the user.
po::options_description visible(usage_top.str());
visible.add_options()
("help", "print help message and exit")
;
// Declare the command line options that are hidden from the user
// (these are used as positional options).
po::options_description hidden("Hidden options");
hidden.add_options();
// Compose the full set of command-line options.
po::options_description cmd_line_options;
cmd_line_options.add(visible).add(hidden);
// Register the positional options.
po::positional_options_description p;
// Process the command-line.
po::variables_map vm;
try {
po::store(po::command_line_parser(argc, argv).style(CommonOptionStyle()).
options(cmd_line_options).positional(p).run(), vm);
po::notify(vm);
} catch (const std::exception &e) {
std::ostringstream msg;
msg << e.what() << "\n\n" << visible;
Error(msg.str());
}
if (vm.count("help")) {
std::cout << visible << std::endl;
std::exit(0);
}
}
} // namespace PCFG
} // namespace Syntax
} // namespace MosesTraining
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