/// Renames a label.
bool XapianIndex::renameLabel(const string &name, const string &newName)
{
bool renamedLabel = false;
XapianDatabase *pDatabase = XapianDatabaseFactory::getDatabase(m_databaseName, false);
if (pDatabase == NULL)
{
cerr << "Bad index " << m_databaseName << endl;
return false;
}
try
{
Xapian::WritableDatabase *pIndex = pDatabase->writeLock();
if (pIndex != NULL)
{
string term("XLABEL:");
// Get documents that have this label
term += name;
for (Xapian::PostingIterator postingIter = pIndex->postlist_begin(term);
postingIter != pIndex->postlist_end(term); ++postingIter)
{
Xapian::docid docId = *postingIter;
// Get the document
Xapian::Document doc = pIndex->get_document(docId);
// Remove the term
doc.remove_term(term);
// ...add the new one
doc.add_term(limitTermLength(string("XLABEL:") + newName));
// ...and update the document
pIndex->replace_document(docId, doc);
}
renamedLabel = true;
}
}
catch (const Xapian::Error &error)
{
cerr << "Couldn't delete label: " << error.get_type() << ": " << error.get_msg() << endl;
}
catch (...)
{
cerr << "Couldn't delete label, unknown exception occured" << endl;
}
pDatabase->unlock();
return renamedLabel;
}
/// Updates a document's properties.
bool XapianIndex::updateDocumentInfo(unsigned int docId, const DocumentInfo &docInfo)
{
bool updated = false;
if (docId == 0)
{
return false;
}
XapianDatabase *pDatabase = XapianDatabaseFactory::getDatabase(m_databaseName, false);
if (pDatabase == NULL)
{
cerr << "Bad index " << m_databaseName << endl;
return false;
}
try
{
Xapian::WritableDatabase *pIndex = pDatabase->writeLock();
if (pIndex != NULL)
{
Xapian::Document doc = pIndex->get_document(docId);
Xapian::termcount termPos = 0;
// Update the document data with the current language
removeCommonTerms(doc);
m_stemLanguage = Languages::toEnglish(docInfo.getLanguage());
addCommonTerms(docInfo, doc, termPos);
setDocumentData(docInfo, doc, m_stemLanguage);
pIndex->replace_document(docId, doc);
updated = true;
}
}
catch (const Xapian::Error &error)
{
cerr << "Couldn't update document properties: " << error.get_type() << ": " << error.get_msg() << endl;
}
catch (...)
{
cerr << "Couldn't update document properties, unknown exception occured" << endl;
}
pDatabase->unlock();
return updated;
}
/// Updates a document's properties.
bool XapianIndex::updateDocumentInfo(unsigned int docId, const DocumentInfo &docInfo)
{
bool updated = false;
if (docId == 0)
{
return false;
}
XapianDatabase *pDatabase = XapianDatabaseFactory::getDatabase(m_databaseName, false);
if (pDatabase == NULL)
{
cerr << "Bad index " << m_databaseName << endl;
return false;
}
try
{
Xapian::WritableDatabase *pIndex = pDatabase->writeLock();
if (pIndex != NULL)
{
Xapian::Document doc = pIndex->get_document(docId);
#ifdef DEBUG
cout << "XapianIndex::updateDocumentInfo: language is " << docInfo.getLanguage() << endl;
#endif
// Update the document data with the current language
setDocumentData(doc, docInfo, docInfo.getLanguage());
pIndex->replace_document(docId, doc);
updated = true;
}
}
catch (const Xapian::Error &error)
{
cerr << "Couldn't update document properties: " << error.get_msg() << endl;
}
catch (...)
{
cerr << "Couldn't update document properties, unknown exception occured" << endl;
}
pDatabase->unlock();
return updated;
}
/// Sets a document's labels.
bool XapianIndex::setDocumentLabels(unsigned int docId, const set<string> &labels,
bool resetLabels)
{
bool updatedLabels = false;
XapianDatabase *pDatabase = XapianDatabaseFactory::getDatabase(m_databaseName, false);
if (pDatabase == NULL)
{
cerr << "Bad index " << m_databaseName << endl;
return false;
}
try
{
Xapian::WritableDatabase *pIndex = pDatabase->writeLock();
if (pIndex != NULL)
{
Xapian::Document doc = pIndex->get_document(docId);
// Reset existing labels ?
if (resetLabels == true)
{
Xapian::TermIterator termIter = pIndex->termlist_begin(docId);
if (termIter != pIndex->termlist_end(docId))
{
for (termIter.skip_to("XLABEL:");
termIter != pIndex->termlist_end(docId); ++termIter)
{
// Is this a label ?
if (strncasecmp((*termIter).c_str(), "XLABEL:", min(7, (int)(*termIter).length())) == 0)
{
doc.remove_term(*termIter);
}
}
}
}
// Set new labels
for (set<string>::const_iterator labelIter = labels.begin(); labelIter != labels.end();
++labelIter)
{
if (labelIter->empty() == false)
{
doc.add_term(limitTermLength(string("XLABEL:") + *labelIter));
}
}
pIndex->replace_document(docId, doc);
updatedLabels = true;
}
}
catch (const Xapian::Error &error)
{
cerr << "Couldn't update document's labels: " << error.get_type() << ": " << error.get_msg() << endl;
}
catch (...)
{
cerr << "Couldn't update document's labels, unknown exception occured" << endl;
}
pDatabase->unlock();
return updatedLabels;
}
/// Updates the given document; true if success.
bool XapianIndex::updateDocument(unsigned int docId, Tokenizer &tokens)
{
unsigned int dataLength = 0;
bool updated = false;
const Document *pDocument = tokens.getDocument();
if (pDocument == NULL)
{
return false;
}
XapianDatabase *pDatabase = XapianDatabaseFactory::getDatabase(m_databaseName, false);
if (pDatabase == NULL)
{
cerr << "Bad index " << m_databaseName << endl;
return false;
}
const char *pData = pDocument->getData(dataLength);
if (pData == NULL)
{
return false;
}
// Cache the document's properties
DocumentInfo docInfo(pDocument->getTitle(), pDocument->getLocation(),
pDocument->getType(), pDocument->getLanguage());
docInfo.setTimestamp(pDocument->getTimestamp());
docInfo.setLocation(Url::canonicalizeUrl(docInfo.getLocation()));
// Don't scan the document if a language is specified
m_stemLanguage = Languages::toEnglish(pDocument->getLanguage());
if (m_stemLanguage.empty() == true)
{
m_stemLanguage = scanDocument(pData, dataLength, docInfo);
}
try
{
set<string> labels;
Xapian::Document doc;
Xapian::termcount termPos = 0;
// Add the tokenizer's terms to the document
addPostingsToDocument(tokens, doc, "", termPos, m_stemMode);
// Get the document's labels
if (getDocumentLabels(docId, labels) == true)
{
// Add labels
for (set<string>::const_iterator labelIter = labels.begin(); labelIter != labels.end();
++labelIter)
{
doc.add_term(limitTermLength(string("XLABEL:") + *labelIter));
}
}
if (addCommonTerms(docInfo, doc, termPos) == true)
{
setDocumentData(docInfo, doc, m_stemLanguage);
Xapian::WritableDatabase *pIndex = pDatabase->writeLock();
if (pIndex != NULL)
{
// Update the document in the database
pIndex->replace_document(docId, doc);
updated = true;
}
}
}
catch (const Xapian::Error &error)
{
cerr << "Couldn't update document: " << error.get_type() << ": " << error.get_msg() << endl;
}
catch (...)
{
cerr << "Couldn't update document, unknown exception occured" << endl;
}
pDatabase->unlock();
return updated;
}
