void XapianIndex::addTermsToDocument(Tokenizer &tokens, Xapian::Document &doc,
const string &prefix, Xapian::termcount &termPos, StemmingMode mode) const
{
Xapian::Stem *pStemmer = NULL;
string term;
// Do we know what language to use for stemming ?
if (m_stemLanguage.empty() == false)
{
pStemmer = new Xapian::Stem(StringManip::toLowerCase(m_stemLanguage));
}
// Get the terms
while (tokens.nextToken(term) == true)
{
if (term.empty() == true)
{
continue;
}
// Does it start with a capital letter ?
if (isupper((int)term[0]) != 0)
{
// R-prefix the raw term
doc.add_posting(string("R") + term, termPos);
}
// Lower case the term
term = StringManip::toLowerCase(term);
// Stem the term ?
if ((mode == STORE_UNSTEM) ||
(pStemmer == NULL))
{
doc.add_posting(limitTermLength(prefix + term), termPos++);
}
else if (mode == STORE_STEM)
{
string stemmedTerm = pStemmer->stem_word(term);
doc.add_posting(limitTermLength(prefix + stemmedTerm), termPos++);
}
else if (mode == STORE_BOTH)
{
string stemmedTerm = pStemmer->stem_word(term);
// Add both
doc.add_posting(limitTermLength(prefix + term), termPos);
// ...at the same position
doc.add_posting(limitTermLength(prefix + stemmedTerm), termPos++);
}
}
#ifdef DEBUG
cout << "XapianIndex::addTermsToDocument: added " << termPos << " terms" << endl;
#endif
if (pStemmer != NULL)
{
delete pStemmer;
}
}
int main(int argc, char **argv)
{
// Simplest possible options parsing: we just require three or more
// parameters.
if(argc < 4) {
cout << "usage: " << argv[0] <<
" <path to database> <document data> <document terms>" << endl;
exit(1);
}
// Catch any Xapian::Error exceptions thrown
try {
// Make the database
Xapian::WritableDatabase database(argv[1], Xapian::DB_CREATE_OR_OPEN);
// Make the document
Xapian::Document newdocument;
// Put the data in the document
newdocument.set_data(string(argv[2]));
// Put the terms into the document
for (int i = 3; i < argc; ++i) {
newdocument.add_posting(argv[i], i - 2);
}
// Add the document to the database
database.add_document(newdocument);
} catch(const Xapian::Error &error) {
cout << "Exception: " << error.get_msg() << endl;
}
}
void XapianIndex::addPostingsToDocument(Tokenizer &tokens, Xapian::Document &doc,
const string &prefix, Xapian::termcount &termPos, StemmingMode mode) const
{
Xapian::Stem *pStemmer = NULL;
string stemPrefix("Z");
string term;
// Do we know what language to use for stemming ?
if (m_stemLanguage.empty() == false)
{
try
{
pStemmer = new Xapian::Stem(StringManip::toLowerCase(m_stemLanguage));
}
catch (const Xapian::Error &error)
{
cerr << "Couldn't create stemmer: " << error.get_type() << ": " << error.get_msg() << endl;
}
}
// Stems are Z-prefixed, unless a prefix is already defined
if (prefix.empty() == false)
{
stemPrefix = prefix;
}
// Get the terms
while (tokens.nextToken(term) == true)
{
bool addStem = false;
if (term.empty() == true)
{
continue;
}
// Lower case the term
term = StringManip::toLowerCase(term);
// Stem the term ?
if ((mode == STORE_UNSTEM) ||
(pStemmer == NULL))
{
doc.add_posting(prefix + XapianDatabase::limitTermLength(term), termPos);
}
else if (mode == STORE_STEM)
{
addStem = true;
}
else if (mode == STORE_BOTH)
{
// Add both
doc.add_posting(prefix + XapianDatabase::limitTermLength(term), termPos);
addStem = true;
}
// Don't stem if the term starts with a digit
if ((addStem == true) &&
(isdigit((int)term[0]) == 0))
{
#if XAPIAN_MAJOR_VERSION==0
string stemmedTerm(pStemmer->stem_word(term));
#else
string stemmedTerm((*pStemmer)(term));
#endif
doc.add_term(stemPrefix + XapianDatabase::limitTermLength(stemmedTerm));
}
++termPos;
}
#ifdef DEBUG
cout << "XapianIndex::addPostingsToDocument: added " << termPos << " terms" << endl;
#endif
if (pStemmer != NULL)
{
delete pStemmer;
}
}
void XapianIndex::addPostingsToDocument(Tokenizer &tokens, Xapian::Document &doc,
const string &prefix, Xapian::termcount &termPos, StemmingMode mode) const
{
Xapian::Stem *pStemmer = NULL;
string upperCasePrefix("R");
string term;
// Do we know what language to use for stemming ?
if (m_stemLanguage.empty() == false)
{
pStemmer = new Xapian::Stem(StringManip::toLowerCase(m_stemLanguage));
}
// Terms starting with a capital letter are R-prefixed, unless a prefix is already defined
if (prefix.empty() == false)
{
upperCasePrefix = prefix;
}
// Get the terms
while (tokens.nextToken(term) == true)
{
if (term.empty() == true)
{
continue;
}
// Does it start with a capital letter ?
if (isupper((int)term[0]) != 0)
{
doc.add_posting(upperCasePrefix + XapianDatabase::limitTermLength(term), termPos);
}
// Lower case the term
term = StringManip::toLowerCase(term);
// Stem the term ?
if ((mode == STORE_UNSTEM) ||
(pStemmer == NULL))
{
doc.add_posting(prefix + XapianDatabase::limitTermLength(term), termPos);
}
else if (mode == STORE_STEM)
{
#if XAPIAN_MAJOR_VERSION==0
string stemmedTerm(pStemmer->stem_word(term));
#else
string stemmedTerm((*pStemmer)(term));
#endif
doc.add_posting(prefix + XapianDatabase::limitTermLength(stemmedTerm), termPos);
}
else if (mode == STORE_BOTH)
{
#if XAPIAN_MAJOR_VERSION==0
string stemmedTerm(pStemmer->stem_word(term));
#else
string stemmedTerm((*pStemmer)(term));
#endif
// Add both at the same position
doc.add_posting(prefix + XapianDatabase::limitTermLength(term), termPos);
if (stemmedTerm != term)
{
// No point adding the same term twice
doc.add_posting(prefix + XapianDatabase::limitTermLength(stemmedTerm), termPos);
}
}
++termPos;
}
#ifdef DEBUG
cout << "XapianIndex::addPostingsToDocument: added " << termPos << " terms" << endl;
#endif
if (pStemmer != NULL)
{
delete pStemmer;
}
}
