C++ Parameters::loadFile方法代码示例

  void processFields( indri::api::Parameters &param ) {
    g_timer.start();
    std::string index = param.get("index");
    std::cout << "Opening: " << index << std::endl;
    // make sure this path doesn't exist.
    std::string idx2 = index + ".new"; // temp target index.

    // presumes a single input oa file for the entire collection.
    std::string offsetAnnotationsPath = param.get("annotations");
      
    /// these need to be combined with existing.
    // fields to add
    // these need to supply numeric/parental/ordinal/etc...
    if (param.exists("addField"))
      addFields = param["addField"];
      
    // fields to remove
    // these only need to be a list of names.
    if (param.exists("removeField")) {
      indri::api::Parameters slice = param["removeField"];
      for (size_t i = 0; i < slice.size(); i++) {
        if( slice[i].exists("name") ) {
          removeNames.push_back( slice[i]["name"] );
        }
      }
    }
      
    // need to know the file class environment to get the 
    // conflations right.
    std::string className = param.get("fileclass", "");

    indri::collection::Repository sourceRepo;
    indri::collection::Repository targetRepo;
    indri::parse::OffsetAnnotationAnnotator oa_annotator;
    indri::parse::FileClassEnvironmentFactory _fileClassFactory;
            
    // Open source repo
    sourceRepo.openRead(index);
    // Copy its parameters, create target repo, adding or removing
    // fields.
    repo.loadFile( indri::file::Path::combine( index, "manifest" ) );
    int mem = param.get("memory", INT64(100*1024*1024));
      
    repo.set("memory", mem);
    adding = addFields.exists("field");
    _mergeFields();
    // Create the offset annotator.
    fce = _fileClassFactory.get( className );
    indri::parse::Conflater* conflater = 0;
    if( fce ) {
      conflater = fce->conflater;
    }
    if (adding) 
      {
        oa_annotator.setConflater( conflater );
        oa_annotator.open( offsetAnnotationsPath );
      }

    targetRepo.create(idx2, &repo);
      
    // for each document in the source repo, fetch ParsedDocument 
    // construct full rep, apply annotator, insert into
    // target repo.

    _index = sourceRepo.indexes()->front(); // presume 1
    _docIter = _index->termListFileIterator();
    _docIter->startIteration();
    // ought to deal with deleted documents here...
    // if there are deleted documents, regular add to collection
    // if not, only rewrite the indexes, then rename the collection.
    indri::index::DeletedDocumentList& deleted = sourceRepo.deletedList();
    UINT64 delCount = deleted.deletedCount();
    if (delCount > 0) 
      {
        // either warn, compact and then process, or 
        // do it the old way... FIXME!
        std::cerr << "Deleted documents detected... compact with dumpindex first." << std::endl;
        return;
      }
    
    for (UINT64 docid = 1; docid <= _index->documentCount(); docid++) 
      {
        if ((docid % 500) == 0)  {
          g_timer.printElapsedSeconds(std::cout);
          std::cout << ": " << docid << "\r";
          std::cout.flush();
        }

        parsed = sourceRepo.collection()->retrieve(docid);
        // combine field and term data with parsed document
        _mergeData();
        // apply annotator
        if (adding)
          parsed = oa_annotator.transform(parsed);
        targetRepo.addDocument(parsed, false);
        // TagList allocs memory for the tags...
        for (size_t i = 0; i < parsed->tags.size(); i++)
          delete(parsed->tags[i]);
        delete(parsed);
        _docIter->nextEntry();
//.........这里部分代码省略.........