/// <summary>
/// Return a query that will return docs like the passed lucene document ID.
/// </summary>
/// <param name="docNum"> the documentID of the lucene doc to generate the 'More Like This" query for. </param>
/// <returns> a query that will return docs like the passed lucene document ID. </returns>
public Query Like(int docNum)
{
if (FieldNames == null)
{
// gather list of valid fields from lucene
ICollection <string> fields = MultiFields.GetIndexedFields(ir);
FieldNames = fields.ToArray();
}
return(CreateQuery(RetrieveTerms(docNum)));
}
/// <summary>
/// Creates a new <see cref="QueryAutoStopWordAnalyzer"/> with stopwords calculated for all
/// indexed fields from terms with a document frequency percentage greater than
/// the given <paramref name="maxPercentDocs"/>
/// </summary>
/// <param name="matchVersion"> Version to be used in <see cref="StopFilter"/> </param>
/// <param name="delegate"> <see cref="Analyzer"/> whose <see cref="TokenStream"/> will be filtered </param>
/// <param name="indexReader"> <see cref="IndexReader"/> to identify the stopwords from </param>
/// <param name="maxPercentDocs"> The maximum percentage (between 0.0 and 1.0) of index documents which
/// contain a term, after which the word is considered to be a stop word </param>
/// <exception cref="IOException"> Can be thrown while reading from the <see cref="IndexReader"/> </exception>
public QueryAutoStopWordAnalyzer(LuceneVersion matchVersion, Analyzer @delegate, IndexReader indexReader, float maxPercentDocs)
: this(matchVersion, @delegate, indexReader, MultiFields.GetIndexedFields(indexReader), maxPercentDocs)
{
}
/// <summary>
/// Creates a new QueryAutoStopWordAnalyzer with stopwords calculated for all
/// indexed fields from terms with a document frequency greater than the given
/// maxDocFreq
/// </summary>
/// <param name="matchVersion"> Version to be used in <seealso cref="StopFilter"/> </param>
/// <param name="delegate"> Analyzer whose TokenStream will be filtered </param>
/// <param name="indexReader"> IndexReader to identify the stopwords from </param>
/// <param name="maxDocFreq"> Document frequency terms should be above in order to be stopwords </param>
/// <exception cref="IOException"> Can be thrown while reading from the IndexReader </exception>
public QueryAutoStopWordAnalyzer(Version matchVersion, Analyzer @delegate, IndexReader indexReader, int maxDocFreq)
: this(matchVersion, @delegate, indexReader, MultiFields.GetIndexedFields(indexReader), maxDocFreq)
{
}