// Copyright 2010-2012, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// NOTE(tabata): This code is used mainly by rx_builder to build
// dictionary. Please check error handling, if you want to include
// this to run within client.
#include "dictionary/text_dictionary_loader.h"
#include <climits>
#include <cstring>
#include "base/base.h"
#include "base/file_stream.h"
#include "base/util.h"
#include "dictionary/dictionary_token.h"
#include "dictionary/pos_matcher.h"
namespace mozc {
TextDictionaryLoader::TextDictionaryLoader() {
}
TextDictionaryLoader::~TextDictionaryLoader() {
Close();
}
bool TextDictionaryLoader::RewriteSpecialToken(Token *token,
const string &label) {
CHECK(token);
if (label.empty()) {
return true;
}
if (Util::StartsWith(label, "SPELLING_CORRECTION")) {
token->attributes = Token::SPELLING_CORRECTION;
return true;
}
if (Util::StartsWith(label, "ZIP_CODE")) {
token->lid = POSMatcher::GetZipcodeId();
token->rid = POSMatcher::GetZipcodeId();
return true;
}
return false;
}
bool TextDictionaryLoader::Open(const char *filename) {
Close();
return OpenWithLineLimit(filename, -1);
}
bool TextDictionaryLoader::OpenWithLineLimit(const char *filename,
int limit) {
Close();
if (limit < 0) {
limit = INT_MAX;
}
vector<string> filenames;
Util::SplitStringUsing(filename, ",", &filenames);
if (filenames.empty()) {
LOG(ERROR) << "filename is empty";
return false;
}
for (size_t i = 0; i < filenames.size(); ++i) {
LOG(INFO) << "Loading: " << filenames[i];
InputFileStream ifs(filenames[i].c_str());
if (!ifs) {
LOG(INFO) << "cannot open: " << filenames[i];
return false;
}
string line;
while (limit > 0 && getline(ifs, line)) {
Util::ChopReturns(&line);
ParseTSV(line);
--limit;
}
}
LOG(INFO) << tokens_.size() << " tokens from " << filename << "\n";
return true;
}
void TextDictionaryLoader::Close() {
for (vector<Token *>::iterator it = tokens_.begin();
it != tokens_.end(); ++it) {
delete *it;
}
tokens_.clear();
}
void TextDictionaryLoader::CollectTokens(vector<Token *> *res) {
for (vector<Token *>::const_iterator it = tokens_.begin();
it != tokens_.end(); ++it) {
res->push_back(*it);
}
}
void TextDictionaryLoader::ParseTSV(const string &line) {
const int kNumFields = 5;
vector<string> fields;
Util::SplitStringUsing(line, "\t", &fields);
CHECK_GE(fields.size(), kNumFields) << "malformed line in dictionary:"
<< line;
Token *token = new Token;
CHECK(token);
Util::NormalizeVoicedSoundMark(fields[0], &token->key);
token->lid = atoi(fields[1].c_str());
token->rid = atoi(fields[2].c_str());
token->cost = atoi(fields[3].c_str());
Util::NormalizeVoicedSoundMark(fields[4], &token->value);
const string label = fields.size() > 5 ? fields[5] : "";
CHECK(RewriteSpecialToken(token, label))
<< "invalid label: " << line;
tokens_.push_back(token);
}
} // namespace mozc