/// <summary>
/// Index list of texts into temporal posting dictionary
/// </summary>
/// <param name="docs">List of texts</param>
/// <returns>Dictionary of terms and posting data</returns>
public Dictionary <string, TermPostingList> IndexDocumentsToTemporalPostingFile(List <string> docs)
{
Dictionary <string, TermPostingList> TemporalPostingFile = new Dictionary <string, TermPostingList>((StringComparer.InvariantCultureIgnoreCase));
foreach (string doc in docs) // for each document text in docs
{
// parse the document text into dictionary of terms and it's frequency and update the max term in the document
var maxTerm = new KeyValuePair <string, int>();
Dictionary <string, int> termsInDocumentDictionary = controller.parser.ParseText(doc, out maxTerm);
// update the document data in the documents list
controller.DocumentsDataList[DocID].DocLength = termsInDocumentDictionary.Count;
controller.DocumentsDataList[DocID].MostFrequentTerm = maxTerm.Key;
controller.DocumentsDataList[DocID].FrequentTermNumberOfInstances = maxTerm.Value;
// for each entry in the terms dictionary update the data in the temporal posting dictionary
foreach (KeyValuePair <string, int> entery in termsInDocumentDictionary)
{
if (!TemporalPostingFile.ContainsKey(entery.Key)) // if the key not exist in the temporal posting dictionary create new instance
{
TemporalPostingFile[entery.Key] = new TermPostingList();
}
if (!termsTFs.ContainsKey(entery.Key)) // if the key not exist in the termsTFs dictionary create new instance
{
termsTFs[entery.Key] = entery.Value;
}
else
{
termsTFs[entery.Key] += entery.Value; // add the TF to total TF of the term in the termsTFs dictionary
}
TermPostingData termData = new TermPostingData(entery.Value, DocID); // create term posting data
TemporalPostingFile[entery.Key].AddToTermPostingList(termData); // update the data in the dictionary
}
DocID++; // move to the next doc in the courpus
}
return(TemporalPostingFile);
}
/// <summary>
/// add termPostingData to the end of the list
/// </summary>
/// <param name="termData"></param>
public void AddToTermPostingList(TermPostingData termData)
{
PostingList.Add(termData);
}