private Document BuildDocumentFromSearchContent(T searchContent)
{
Document doc = new Document();
IList <SearchContentFieldInfo> fields = SearchGenericUtils.GetSearchContentFields(typeof(T), searchContent);
for (int i = 0; i < fields.Count; i++)
{
SearchContentFieldInfo fi = fields[i];
switch (fi.FieldType)
{
case SearchContentFieldType.Text:
doc.Add(Field.Text(fi.Name, fi.Value));
break;
case SearchContentFieldType.UnStored:
doc.Add(Field.UnStored(fi.Name, fi.Value));
break;
case SearchContentFieldType.UnIndexed:
doc.Add(Field.UnIndexed(fi.Name, fi.Value));
break;
case SearchContentFieldType.Keyword:
doc.Add(Field.Keyword(fi.Name, fi.Value));
break;
default:
break;
}
}
return(doc);
}
/// <summary>
/// Searches the index.
/// </summary>
/// <param name="queryText"></param>
/// <param name="keywordFilter">A Hashtable where the key is the fieldname of the keyword and
/// the value the keyword itself.</param>
/// <param name="pageIndex"></param>
/// <param name="pageSize"></param>
/// <returns></returns>
public SearchResultCollection <T> Find(string queryText, Hashtable keywordFilter, int pageIndex, int pageSize)
{
long startTicks = DateTime.Now.Ticks;
string[] qryFields = SearchGenericUtils.GetSearchContentQueryFields(typeof(T));
if (qryFields.Length == 0)
{
throw new Exception("No query field specified on target class!");
}
Query query = MultiFieldQueryParser.Parse(queryText, qryFields, new StandardAnalyzer());
IndexSearcher searcher = new IndexSearcher(this._indexDirectory);
Hits hits;
if (keywordFilter != null && keywordFilter.Count > 0)
{
QueryFilter qf = BuildQueryFilterFromKeywordFilter(keywordFilter);
hits = searcher.Search(query, qf);
}
else
{
hits = searcher.Search(query);
}
int start = pageIndex * pageSize;
int end = (pageIndex + 1) * pageSize;
if (hits.Length() <= end)
{
end = hits.Length();
}
SearchResultCollection <T> results = new SearchResultCollection <T>();
results.TotalCount = hits.Length();
results.PageIndex = pageIndex;
string[] resultFields = SearchGenericUtils.GetSearchContentResultFields(typeof(T));
for (int i = start; i < end; i++)
{
T instance = Activator.CreateInstance <T>();
for (int j = 0; j < resultFields.Length; j++)
{
SearchGenericUtils.SetSearchResultField(instance, resultFields[j], hits.Doc(i).Get(resultFields[j]));
}
if (instance is ISearchResultStat)
{
SearchGenericUtils.SetSearchResultField(instance, "Boost", hits.Doc(i).GetBoost());
SearchGenericUtils.SetSearchResultField(instance, "Score", hits.Score(i));
}
results.Add(instance);
}
searcher.Close();
results.ExecutionTime = DateTime.Now.Ticks - startTicks;
return(results);
}
/// <summary>
/// Delete existing content from the search index.
/// </summary>
/// <param name="searchContent"></param>
public void DeleteContent(T searchContent)
{
if (this._rebuildIndex)
{
throw new InvalidOperationException("Cannot delete documents when rebuilding the index.");
}
else
{
this._indexWriter.Close();
this._indexWriter = null;
// The SearchContentKey uniquely identifies a document in the index.
SearchContentFieldInfo ki = SearchGenericUtils.GetSearchContentKeyFieldInfo(typeof(T), searchContent);
if (String.IsNullOrEmpty(ki.Name))
{
throw new Exception("SearchContentKey Field not specified on target class!");
}
Term term = new Term(ki.Name, ki.Value);
IndexReader rdr = IndexReader.Open(this._indexDirectory);
rdr.Delete(term);
rdr.Close();
}
}
