void indri::api::Parameters::loadFile( const std::string& filename ) {
std::ifstream input;
indri::xml::XMLReader reader;
input.open( filename.c_str(), std::ifstream::in );
if( input.rdstate() & std::ios::failbit )
LEMUR_THROW( LEMUR_IO_ERROR, "Couldn't open parameter file '" + filename + "' for reading." );
input.seekg( 0, std::ios::end );
size_t length = input.tellg();
input.seekg( 0, std::ios::beg );
// null terminate it to make a string in the XML reader for comment strip
char* buffer = new char[length + 1];
buffer[length] = '\0';
try {
input.read( buffer, length );
std::auto_ptr<indri::xml::XMLNode> result( reader.read( buffer, length ) );
_loadXML( result.get() );
} catch( lemur::api::Exception& e ) {
LEMUR_RETHROW( e, "Had trouble parsing parameter file '" + filename + "'" );
}
delete[] buffer;
input.close();
}
int indri::xml::XMLReader::_findClosingTag( const char* buffer, int start, int finish, std::string& openingTagName, bool* tagsBetween ) {
int openingTags = 0;
int closingTags = 0;
int position = start;
bool done = false;
bool match = false;
int tagType;
if( tagsBetween )
*tagsBetween = false;
try {
while( !done ) {
std::string tagName;
position = _findBeginTag( buffer, position, finish );
int end = _readTag( buffer, position, finish, &tagName, NULL, &tagType );
if( tagType == TAG_CDATA_TYPE ) {
std::string cdata = &buffer[end];
std::string::size_type dataEnd = cdata.find("]]>");
position = end + dataEnd + 1;
} else if( tagType != TAG_CLOSE_TYPE ) {
if( tagsBetween )
*tagsBetween = true;
if( tagType == TAG_OPEN_TYPE )
openingTags++;
position = end;
while( openingTags > closingTags ) {
// don't need to check for matching tags here, we just need to
// count open and closed tags
position = _findBeginTag( buffer, position, finish );
end = _readTag( buffer, position, finish, NULL, NULL, &tagType );
position = end;
if( tagType == TAG_CDATA_TYPE ) {
std::string cdata = &buffer[end];
std::string::size_type dataEnd = cdata.find("]]>");
position = end + dataEnd + 1;
} else if( tagType == TAG_OPEN_TYPE ) {
openingTags++;
} else if( tagType == TAG_CLOSE_TYPE ) {
closingTags++;
}
}
} else {
match = (tagName == openingTagName);
done = true;
}
}
} catch( lemur::api::Exception& e ) {
LEMUR_RETHROW( e, std::string() + "Caught an error while looking for an end tag for '" + openingTagName + "'" );
}
if( match ) {
return position;
} else {
return -1;
}
}
lemur::api::Stemmer* lemur::api::TextHandlerManager::createStemmer(string type, string datadir, string func) {
Stemmer *stemmer = NULL;
if (type.empty()) {
// didn't pass in type, try to get it from the paramstack
type = ParamGetString("stemmer");
}
// if it's still empty, return nothing
if (type.empty())
return NULL;
// make it all lowercase
for (int i=0;i<type.length();i++)
type[i] = tolower(type[i]);
try {
if (type == lemur::parse::KStemmer::identifier) {
stemmer = new lemur::parse::KStemmer();
// cerr << "created Kstemmer" << endl;
} else if (type == lemur::parse::PorterStemmer::identifier) {
stemmer = new lemur::parse::PorterStemmer();
//cerr << "created porter stemmer" << endl;
}
} catch (Exception &ex) {
LEMUR_RETHROW(ex, "Could not create Stemmer");
}
return stemmer;
}
void indri::api::Parameters::load( const std::string& text ) {
indri::xml::XMLReader reader;
try {
std::auto_ptr<indri::xml::XMLNode> result( reader.read( text ) );
_loadXML( result.get() );
} catch( lemur::api::Exception& e ) {
LEMUR_RETHROW( e, "Had trouble parsing parameter text" );
}
}
// Runs the query, expanding it if necessary. Will print output as well if verbose is on.
void _runQuery( std::stringstream& output, const std::string& query,
const std::string &queryType, const std::vector<std::string> &workingSet, std::vector<std::string> relFBDocs ) {
try {
if( _printQuery ) output << "# query: " << query << std::endl;
std::vector<lemur::api::DOCID_T> docids;;
if (workingSet.size() > 0)
docids = _environment.documentIDsFromMetadata("docno", workingSet);
if (relFBDocs.size() == 0) {
if( _printSnippets ) {
if (workingSet.size() > 0)
_annotation = _environment.runAnnotatedQuery( query, docids, _initialRequested, queryType );
else
_annotation = _environment.runAnnotatedQuery( query, _initialRequested );
_results = _annotation->getResults();
} else {
if (workingSet.size() > 0)
_results = _environment.runQuery( query, docids, _initialRequested, queryType );
else
_results = _environment.runQuery( query, _initialRequested, queryType );
}
}
if( _expander ) {
std::vector<indri::api::ScoredExtentResult> fbDocs;
if (relFBDocs.size() > 0) {
docids = _environment.documentIDsFromMetadata("docno", relFBDocs);
for (size_t i = 0; i < docids.size(); i++) {
indri::api::ScoredExtentResult r(0.0, docids[i]);
fbDocs.push_back(r);
}
}
std::string expandedQuery;
if (relFBDocs.size() != 0)
expandedQuery = _expander->expand( query, fbDocs );
else
expandedQuery = _expander->expand( query, _results );
if( _printQuery ) output << "# expanded: " << expandedQuery << std::endl;
if (workingSet.size() > 0) {
docids = _environment.documentIDsFromMetadata("docno", workingSet);
_results = _environment.runQuery( expandedQuery, docids, _requested, queryType );
} else {
_results = _environment.runQuery( expandedQuery, _requested, queryType );
}
}
}
catch( lemur::api::Exception& e )
{
_results.clear();
LEMUR_RETHROW(e, "QueryThread::_runQuery Exception");
}
}
bool lemur::file::Keyfile::next( int& key, char* value, int& valueLength ) {
char keyBuf[KEYFILE_KEYBUF_SIZE];
int keyLength = KEYFILE_KEYBUF_SIZE;
bool result = false ;
try {
result = next( keyBuf, keyLength, value, valueLength );
} catch (lemur::api::Exception &e) {
key = _decodeKey( keyBuf );
LEMUR_RETHROW( e, "Caught an internal error while trying to fetch next record with an int key." );
}
if( result )
key = _decodeKey( keyBuf );
return result;
}
lemur::api::Stopper* lemur::api::TextHandlerManager::createStopper(string filename) {
Stopper* stopper = NULL;
if (filename.empty())
filename = ParamGetString("stopwords");
if (!filename.empty()) {
try {
stopper = new Stopper(filename);
//cerr << "created stopper" << endl;
} catch (Exception &ex) {
LEMUR_RETHROW(ex, "Could not create Stopper using file name");
}
}
return stopper;
}
void indri::collection::Repository::open(const std::string& path, indri::api::Parameters* options) {
try {
_path = path;
_readOnly = false;
_memory = defaultMemory;
if (options)
_memory = options->get("memory", _memory);
float queryProportion = 0.75;
if (options)
queryProportion = static_cast<float>(options->get("queryProportion", queryProportion));
std::string indexPath = indri::file::Path::combine(path, "index");
std::string collectionPath = indri::file::Path::combine(path, "collection");
std::string indexName = indri::file::Path::combine(indexPath, "index");
_parameters.loadFile(indri::file::Path::combine(path, "manifest"));
_buildFields();
_buildChain(_parameters, options);
// open all indexes, add a memory index
_openIndexes(_parameters, indexPath);
_addMemoryIndex();
// remove that initial state (only disk indexes)
_states.erase(_states.begin());
// open compressed collection
_collection = new CompressedCollection();
_collection->open(collectionPath);
// open priors
_openPriors(path);
// read deleted documents in
std::string deletedName = indri::file::Path::combine(path, "deleted");
_deletedList.read(deletedName);
_startThreads();
} catch(lemur::api::Exception& e) {
LEMUR_RETHROW(e, "Couldn't open a repository at '" + path + "' because:");
} catch(...) {
LEMUR_THROW(LEMUR_RUNTIME_ERROR, "Something unexpected happened while trying to create '" + path + "'");
}
}
void indri::query::RelevanceModel::generate( const std::string& query, const std::vector<indri::api::ScoredExtentResult>& results ) {
try {
_results = results;
_logtoposterior(_results);
_grams.clear();
_extractDocuments();
_vectors = _environment.documentVectors( _documentIDs );
_countGrams();
_scoreGrams();
_sortGrams();
for (unsigned int i = 0; i < _vectors.size(); i++)
delete _vectors[i];
} catch( lemur::api::Exception& e ) {
LEMUR_RETHROW( e, "Couldn't generate relevance model for '" + query + "' because: " );
}
}
// Runs the query, expanding it if necessary. Will print output as well if verbose is on.
void _runQuery( std::stringstream& output, const std::string& query,
const std::string &queryType ) {
try {
if( _printQuery ) output << "# query: " << query << std::endl;
if( _printSnippets ) {
_annotation = _environment.runAnnotatedQuery( query, _initialRequested );
_results = _annotation->getResults();
} else {
_results = _environment.runQuery( query, _initialRequested, queryType );
}
if( _expander ) {
std::string expandedQuery = _expander->expand( query, _results );
if( _printQuery ) output << "# expanded: " << expandedQuery << std::endl;
_results = _environment.runQuery( expandedQuery, _requested, queryType );
}
}
catch( lemur::api::Exception& e )
{
_results.clear();
LEMUR_RETHROW(e, "QueryThread::_runQuery Exception");
}
}
void indri::collection::Repository::_openIndexes(indri::api::Parameters& params, const std::string& parentPath) {
try {
indri::api::Parameters container = params["indexes"];
_active = new index_vector;
_states.push_back(_active);
_indexCount = params.get("indexCount", 0);
if (container.exists("index")) {
indri::api::Parameters indexes = container["index"];
for(size_t i=0; i<indexes.size(); i++) {
indri::api::Parameters indexSpec = indexes[i];
indri::index::DiskIndex* diskIndex = new indri::index::DiskIndex();
std::string indexName = (std::string) indexSpec;
diskIndex->open(parentPath, indexName);
_active->push_back(diskIndex);
}
}
} catch(lemur::api::Exception& e) {
LEMUR_RETHROW(e, "_openIndexes: Couldn't open DiskIndexes because:");
}
}
indri::parse::UnparsedDocument* indri::parse::PDFDocumentExtractor::nextDocument() {
if( !_documentPath.length() )
return 0;
PDFDoc* doc = 0;
TextOutputDev* textOut = 0;
GString* gfilename = new GString(_documentPath.c_str());
doc = new PDFDoc( gfilename );
// if the doc is not ok, or ok to copy, it
// will be a document of length 0.
if( doc->isOk() && doc->okToCopy() ) {
void* stream = &_documentTextBuffer;
textOut = new TextOutputDev( buffer_write, stream, gFalse, gFalse);
if ( textOut->isOk() ) {
int firstPage = 1;
int lastPage = doc->getNumPages();
double hDPI=72.0;
double vDPI=72.0;
int rotate=0;
GBool useMediaBox=gFalse;
GBool crop=gTrue;
GBool printing=gFalse;
if(doc->readMetadata()!=NULL)
{
GString rawMetaData = doc->readMetadata();
GString preparedMetaData="";
//zoek <rdf:RDF en eindig bij </rdf:RDF>!!
for(int x=0; x<rawMetaData.getLength(); x++) {
if(rawMetaData.getChar(x)!='?' && rawMetaData.getChar(x)!=':') {
//skip characters which the XMLReader doesn't understand
preparedMetaData.append(rawMetaData.getChar(x));
}
}
std::string metaData(preparedMetaData.getCString());
int startbegin = metaData.find("<rdf");
int stopend = metaData.find(">", metaData.rfind("</rdf") );
metaData = metaData.substr(startbegin, (stopend-startbegin)+1 );
indri::xml::XMLReader reader;
try {
std::auto_ptr<indri::xml::XMLNode> result( reader.read( metaData.c_str() ) );
appendPdfMetaData( result.get() );
} catch( lemur::api::Exception& e ) {
LEMUR_RETHROW( e, "Had trouble reading PDF metadata" );
}
if( _author.length()>0 || _title.length()>0 )
{
std::string createdPdfHeader;
createdPdfHeader="<head>\n";
if(_title.length()>0) {
createdPdfHeader+="<title>";
createdPdfHeader+=_title;
createdPdfHeader+="</title>\n";
}
if(_author.length()>0) {
createdPdfHeader+="<author>";
createdPdfHeader+=_author;
createdPdfHeader+="</author>\n";
}
createdPdfHeader+="</head>\n";
char *metastream = _documentTextBuffer.write( createdPdfHeader.length()+1 );
strcpy(metastream, createdPdfHeader.c_str());
}
}
doc->displayPages(textOut, firstPage, lastPage, hDPI, vDPI, rotate, useMediaBox, crop, printing);
}
}
delete textOut;
delete doc;
_unparsedDocument.textLength = _documentTextBuffer.position();
_unparsedDocument.contentLength = _unparsedDocument.textLength ? _documentTextBuffer.position() - 1 : 0 ; // no null 0 if text is empty.
char* docnoPoint = _documentTextBuffer.write( _documentPath.length()+1 );
strcpy( docnoPoint, _documentPath.c_str() );
_unparsedDocument.text = _documentTextBuffer.front();
_unparsedDocument.content = _documentTextBuffer.front();
_unparsedDocument.metadata.clear();
indri::parse::MetadataPair pair;
pair.key = "path";
pair.value = docnoPoint;
pair.valueLength = _documentPath.length()+1;
_unparsedDocument.metadata.push_back( pair );
_docnostring.assign(_documentPath.c_str() );
cleanDocno();
pair.value = _docnostring.c_str();
pair.valueLength = _docnostring.length()+1;
pair.key = "docno";
_unparsedDocument.metadata.push_back( pair );
_documentPath = "";
return &_unparsedDocument;
}
void indri::collection::Repository::create(const std::string& path, indri::api::Parameters* options) {
_path = path;
_readOnly = false;
try {
_cleanAndCreateDirectory(path);
_memory = defaultMemory;
if (options)
_memory = options->get("memory", _memory);
float queryProportion = 0.15f;
if (options)
queryProportion = static_cast<float>(options->get("queryProportion", queryProportion));
if (options)
_copyParameters(*options);
_buildFields();
_buildChain(_parameters, 0);
std::string indexPath = indri::file::Path::combine(path, "index");
std::string collectionPath = indri::file::Path::combine(path, "collection");
if (!indri::file::Path::exists(indexPath))
indri::file::Path::create(indexPath);
std::string indexName = indri::file::Path::combine(indexPath, "index");
_active = new index_vector;
_states.push_back(_active);
_active->push_back(new indri::index::MemoryIndex(1, _indexFields));
_indexCount = 0;
_collection = new CompressedCollection();
if (!indri::file::Path::exists(collectionPath))
indri::file::Path::create(collectionPath);
std::vector<std::string> forwardFields;
std::vector<std::string> backwardFields;
if (options && options->exists("collection.forward")) {
indri::api::Parameters cfields = options->get("collection.forward");
for(size_t i=0; i<cfields.size(); i++) {
forwardFields.push_back((std::string) cfields[i]);
}
}
if (options && options->exists("collection.backward")) {
indri::api::Parameters cfields = options->get("collection.backward");
for(size_t i=0; i<cfields.size(); i++) {
backwardFields.push_back((std::string) cfields[i]);
}
}
_collection->create(collectionPath, forwardFields, backwardFields,
options->get("storeDocs", true));
_startThreads();
} catch(lemur::api::Exception& e) {
LEMUR_RETHROW(e, "Couldn't create a repository at '" + path + "' because:");
} catch(...) {
LEMUR_THROW(LEMUR_RUNTIME_ERROR, "Something unexpected happened while trying to create '" + path + "'");
}
}
void indri::collection::Repository::merge(const std::string& path, const std::vector<std::string>& inputIndexes) {
// Create the directory for the output index
_cleanAndCreateDirectory(path);
std::string indexPath = indri::file::Path::combine(path, "index");
std::string collectionPath = indri::file::Path::combine(path, "collection");
// First, we're going to harvest information from the individual indexes. We want to
// check a few things:
// 1. do they all use the same stemmer?
// 2. do they all have the same indexed fields?
// 3. are they all merged (only have one disk index?)
// 4. how many documents are in each one?
// If no indexes are given, make an empty repository and return
if (inputIndexes.size() == 0) {
makeEmpty(path);
return;
}
std::vector<lemur::api::DOCID_T> documentMaximums;
// Open up the first repository and extract field information
Repository firstRepository;
try {
firstRepository.openRead(inputIndexes[0]);
} catch(lemur::api::Exception& e) {
LEMUR_RETHROW(e, "Merge failed, couldn't find repository: " + inputIndexes[0]);
}
std::vector<Field> indexFields = firstRepository.fields();
firstRepository.close();
// Open up the first manifest and check on stemming and fields
indri::api::Parameters firstManifest;
std::string firstManifestPath = indri::file::Path::combine(inputIndexes[0], "manifest");
try {
firstManifest.loadFile(firstManifestPath);
} catch(lemur::api::Exception& e) {
LEMUR_RETHROW(e, "Merge failed, couldn't find repository: " + inputIndexes[0]);
}
std::string stemmerName = _stemmerName(firstManifest);
std::vector<std::string> fieldNames = _fieldNames(firstManifest);
// Now, gather information about the indexes
for(size_t i=0; i<inputIndexes.size(); i++) {
indri::api::Parameters repositoryManifest;
std::string manifestPath = indri::file::Path::combine(inputIndexes[i], "manifest");
try {
repositoryManifest.loadFile(manifestPath);
} catch(lemur::api::Exception& e) {
LEMUR_RETHROW(e, "Couldn't find repository: " + inputIndexes[i]);
}
if (!repositoryManifest.exists("indexes.index")) {
documentMaximums.push_back(0);
continue;
}
// Check to make sure there's only one index in there
size_t indexCount = repositoryManifest["indexes.index"].size();
if (indexCount > 1) {
LEMUR_THROW(LEMUR_RUNTIME_ERROR, "Cannot merge repositories that have unmerged internal indexes: " + inputIndexes[i]);
}
// How many documents are in this one?
indri::index::DiskIndex diskIndex;
std::string basePath = indri::file::Path::combine(inputIndexes[i], "index");
std::string relativePath = i64_to_string((INT64)repositoryManifest["indexes.index"]);
diskIndex.open(basePath, relativePath);
documentMaximums.push_back(diskIndex.documentMaximum());
diskIndex.close();
// Only check successive indexes against the first one
if (i == 0)
continue;
// Verify that the same fields and stemmers are used
if (stemmerName != _stemmerName(repositoryManifest)) {
LEMUR_THROW(LEMUR_RUNTIME_ERROR, "Cannot merge repositories that use different stemmers: " + inputIndexes[i]);
}
if (fieldNames != _fieldNames(repositoryManifest)) {
LEMUR_THROW(LEMUR_RUNTIME_ERROR, "Cannot merge repositories that use different fields: " + inputIndexes[i]);
}
}
std::vector<std::string> usableIndexes = inputIndexes;
// remove any repositories that have no documents
for(size_t i=0; i<usableIndexes.size(); i++) {
if (documentMaximums[i] == 0) {
documentMaximums.erase(documentMaximums.begin() + i);
usableIndexes.erase(usableIndexes.begin() + i);
i--;
}
}
// now that we've removed empty indexes, are there any left?
if (usableIndexes.size() == 0) {
makeEmpty(path);
return;
}
// 2. merge the deleted bitmaps
_mergeBitmaps(path, usableIndexes, documentMaximums);
// 3. merge compressed collections
_mergeCompressedCollections(path, usableIndexes, documentMaximums);
// 4. merge the indexes
_mergeClosedIndexes(path, usableIndexes, indexFields, documentMaximums);
// 5. write the manifest file
_writeMergedManifest(path, firstManifest);
}
UINT64 initialize() {
try {
_environment.setSingleBackgroundModel( _parameters.get("singleBackgroundModel", false) );
std::vector<std::string> stopwords;
if( copy_parameters_to_string_vector( stopwords, _parameters, "stopper.word" ) )
_environment.setStopwords(stopwords);
std::vector<std::string> smoothingRules;
if( copy_parameters_to_string_vector( smoothingRules, _parameters, "rule" ) )
_environment.setScoringRules( smoothingRules );
if( _parameters.exists( "index" ) ) {
indri::api::Parameters indexes = _parameters["index"];
for( size_t i=0; i < indexes.size(); i++ ) {
_environment.addIndex( std::string(indexes[i]) );
}
}
if( _parameters.exists( "server" ) ) {
indri::api::Parameters servers = _parameters["server"];
for( size_t i=0; i < servers.size(); i++ ) {
_environment.addServer( std::string(servers[i]) );
}
}
if( _parameters.exists("maxWildcardTerms") )
_environment.setMaxWildcardTerms(_parameters.get("maxWildcardTerms", 100));
_requested = _parameters.get( "count", 1000 );
_initialRequested = _parameters.get( "fbDocs", _requested );
_runID = _parameters.get( "runID", "indri" );
_trecFormat = _parameters.get( "trecFormat" , false );
_inexFormat = _parameters.exists( "inex" );
_printQuery = _parameters.get( "printQuery", false );
_printDocuments = _parameters.get( "printDocuments", false );
_printPassages = _parameters.get( "printPassages", false );
_printSnippets = _parameters.get( "printSnippets", false );
if (_parameters.exists("baseline")) {
// doing a baseline
std::string baseline = _parameters["baseline"];
_environment.setBaseline(baseline);
// need a factory for this...
if( _parameters.get( "fbDocs", 0 ) != 0 ) {
// have to push the method in...
std::string rule = "method:" + baseline;
_parameters.set("rule", rule);
_expander = new indri::query::TFIDFExpander( &_environment, _parameters );
}
} else {
if( _parameters.get( "fbDocs", 0 ) != 0 ) {
_expander = new indri::query::RMExpander( &_environment, _parameters );
}
}
if (_parameters.exists("maxWildcardTerms")) {
_environment.setMaxWildcardTerms((int)_parameters.get("maxWildcardTerms"));
}
} catch ( lemur::api::Exception& e ) {
while( _queries.size() ) {
query_t *query = _queries.front();
_queries.pop();
_output.push( new query_t( query->index, query->number, "query: " + query->number + " QueryThread::_initialize exception\n" ) );
_queueEvent.notifyAll();
LEMUR_RETHROW(e, "QueryThread::_initialize");
}
}
return 0;
}
