public SnippetReader(TextReader line_reader, string[] query_terms, bool full_text, int context_length, int snippet_length)
{
this.line_reader = line_reader;
this.found_snippet_length = 0;
this.full_text = full_text;
this.context_length = (context_length > 0 ? context_length : context_length_default);
this.snippet_length = (snippet_length > 0 ? snippet_length : snippet_length_default);
if (query_terms == null)
{
return;
}
this.sliding_window = new SlidingWindow(this.context_length);
// remove stop words from query_terms
query_terms_list = new ArrayList(query_terms.Length);
foreach (string term in query_terms)
{
if (LuceneCommon.IsStopWord(term))
{
continue;
}
query_terms_list.Add(term);
}
//Console.WriteLine ("Creating snippet reader");
}
static void AddSearchTermInfo(QueryPart part,
SearchTermResponse response, StringBuilder sb)
{
if (part.Logic == QueryPartLogic.Prohibited)
{
return;
}
if (part is QueryPart_Or)
{
ICollection sub_parts;
sub_parts = ((QueryPart_Or)part).SubParts;
foreach (QueryPart qp in sub_parts)
{
AddSearchTermInfo(qp, response, sb);
}
return;
}
if (!(part is QueryPart_Text))
{
return;
}
QueryPart_Text tp;
tp = (QueryPart_Text)part;
string [] split;
split = tp.Text.Split(' ');
// First, remove stop words
for (int i = 0; i < split.Length; ++i)
{
if (LuceneCommon.IsStopWord(split [i]))
{
split [i] = null;
}
}
// Assemble the phrase minus stop words
sb.Length = 0;
for (int i = 0; i < split.Length; ++i)
{
if (split [i] == null)
{
continue;
}
if (sb.Length > 0)
{
sb.Append(' ');
}
sb.Append(split [i]);
}
response.ExactText.Add(sb.ToString());
// Now assemble a stemmed version
sb.Length = 0; // clear the previous value
for (int i = 0; i < split.Length; ++i)
{
if (split [i] == null)
{
continue;
}
if (sb.Length > 0)
{
sb.Append(' ');
}
sb.Append(LuceneCommon.Stem(split [i].ToLower()));
}
response.StemmedText.Add(sb.ToString());
}