/// Builds the index...
public int CreateIndex(string collectionPath, string indexPath)
{
// start timer...
DateTime start = DateTime.Now;
// get all of the files names in the collection path
List <string> filenames = FileHandling.GetFileNames(collectionPath, false);
// initialise the index
InitIndex(indexPath);
// build the index
// this method call does lots of things in parallel
myCollection = ReadAndProcessFiles(filenames);
// close the index
CleanUpIndex();
// end timer and calculate total time
DateTime end = DateTime.Now;
TimeSpan duration = end - start;
indexTime = duration.Seconds + (float)duration.Milliseconds / 1000;
return(myCollection.Length());
}
/// Writes a trec evaluation file from the search results.
/// if the query is not a standard one, '000' is used as the topicID
public int WriteEvalFile(string fileName, string topicID)
{
List <string> evalList = new List <string>();
bool appendFlag = true;
// check if the file exists
if (File.Exists(fileName) == true)
{
// prompt for append
DialogResult append = MessageBox.Show("Do you want to append to the existing file?",
"Confirm",
MessageBoxButtons.YesNo);
if (append == DialogResult.Yes)
{
appendFlag = true;
}
else
{
// if overwrite confirm
DialogResult ruSure = MessageBox.Show("Are you sure you want to overwrite the file?",
"Confirm",
MessageBoxButtons.YesNo);
if (ruSure == DialogResult.Yes)
{
appendFlag = false;
}
}
}
// this is fixed
string groupName = "09648500_NathanOnly";
// structure TopicID QO DocID rank score group
string tempString = "";
for (int i = 0; i < resultsCollection.Length(); i++)
{
IRDocument doc = resultsCollection.GetIRDocument(i);
tempString = topicID + "\tQ0\t";
tempString += doc.GetDocID() + "\t";
tempString += doc.Rank + "\t";
tempString += doc.Score + "\t";
tempString += groupName + "\n";
evalList.Add(tempString);
}
// write file
FileHandling.WriteTextFile(evalList, fileName, appendFlag);
return(0);
}
/// Builds an IRCollection from the search results.
// This is used to display the search results.
// returns the number of results
public int BuildResults()
{
CreateSearcher();
IRCollection resultDocs = new IRCollection(myCollection, searcher, searchResults);
CleanUpSearcher();
resultsCollection = resultDocs;
return(resultDocs.Length());
}
