/// <summary>
/// Adds the information related to the new
/// occurrence of the term in the field and
/// position passed as argument. If a TermOccurrence
/// object for the specified field
/// is already in the collection, the new position
/// information is simply added to the existing
/// TermOccurrence object. Otherwise a new TermOccurrence
/// object will be created and added to the
/// collection.
/// </summary>
/// <param name="field">field where the term
/// was found</param>
/// <param name="position">
/// position in the field where the term was found</param>
public void Add(IndexedField field, int position)
{
foreach (TermOccurrence to in InnerList)
{
if (to.Field == field)
{
to.Add(position);
return;
}
}
InnerList.Add(new TermOccurrence(field, position));
}
void IndexByToken(Token token, IRecord record, IndexedField field)
{
Postings postings = (Postings)_postings[token.Value];
if (null == postings)
{
postings = new Postings(token.Value);
_postings[token.Value] = postings;
}
postings.Add(record, field, token.Position);
}
void IndexByField(IRecord record, IndexedField field)
{
string value = (string)record[field.Name];
ITokenizer tokenizer = CreateTokenizer(value);
Token token = tokenizer.NextToken();
while (null != token)
{
IndexByToken(token, record, field);
token = tokenizer.NextToken();
}
}
/// <summary>
/// Creates a new TermOccurrence for the
/// field and position passed as arguments.
/// </summary>
/// <param name="field">the field where the term was found</param>
/// <param name="position">the position where the term was found</param>
public TermOccurrence(IndexedField field, int position)
{
_field = field;
_positions = new int[] { position };
}
/// <summary>
/// Adds a new occurrence of the term. The occurrence
/// information (field and position) will be added
/// to an existing Posting object whenever possible.
/// </summary>
/// <param name="record">the record where the term was found</param>
/// <param name="field">the field where the term was found</param>
/// <param name="position">the position in the field where the term was found</param>
public void Add(IRecord record, IndexedField field, int position)
{
Posting posting = _postings[record] as Posting;
if (null == posting)
{
posting = new Posting(record);
_postings[record] = posting;
}
posting.Occurrences.Add(field, position);
}