private int maxDocs = 200; // max to cache
internal Hits(Searcher s, Query q, Filter f)
{
query = q;
searcher = s;
filter = f;
GetMoreDocs(50); // retrieve 100 initially
}
/// <summary> A search implementation which spans a new thread for each
/// Searchable, waits for each search to complete and merge
/// the results back together.
/// </summary>
public override TopDocs Search(Query query, Filter filter, int nDocs)
{
HitQueue hq = new HitQueue(nDocs);
int totalHits = 0;
MultiSearcherThread[] msta = new MultiSearcherThread[searchables.Length];
for (int i = 0; i < searchables.Length; i++)
{
// search each searcher
// Assume not too many searchables and cost of creating a thread is by far inferior to a search
msta[i] = new MultiSearcherThread(searchables[i], query, filter, nDocs, hq, i, starts, "MultiSearcher thread #" + (i + 1));
msta[i].Start();
}
for (int i = 0; i < searchables.Length; i++)
{
try
{
msta[i].Join();
}
catch (System.Threading.ThreadInterruptedException ie)
{
; // TODO: what should we do with this???
}
System.IO.IOException ioe = msta[i].GetIOException();
if (ioe == null)
{
totalHits += msta[i].Hits();
}
else
{
// if one search produced an IOException, rethrow it
throw ioe;
}
}
ScoreDoc[] scoreDocs = new ScoreDoc[hq.Size()];
for (int i = hq.Size() - 1; i >= 0; i--)
// put docs in array
scoreDocs[i] = (ScoreDoc) hq.Pop();
return new TopDocs(totalHits, scoreDocs);
}
protected internal virtual void AddClause(System.Collections.ArrayList clauses, int conj, int mods, Query q)
{
bool required, prohibited;
// If this term is introduced by AND, make the preceding term required,
// unless it's already prohibited
if (clauses.Count > 0 && conj == CONJ_AND)
{
BooleanClause c = (BooleanClause) clauses[clauses.Count - 1];
if (!c.prohibited)
c.required = true;
}
if (clauses.Count > 0 && operator_Renamed == DEFAULT_OPERATOR_AND && conj == CONJ_OR)
{
// If this term is introduced by OR, make the preceding term optional,
// unless it's prohibited (that means we leave -a OR b but +a OR b-->a OR b)
// notice if the input is a OR b, first term is parsed as required; without
// this modification a OR b would parsed as +a OR b
BooleanClause c = (BooleanClause) clauses[clauses.Count - 1];
if (!c.prohibited)
c.required = false;
}
// We might have been passed a null query; the term might have been
// filtered away by the analyzer.
if (q == null)
return ;
if (operator_Renamed == DEFAULT_OPERATOR_OR)
{
// We set REQUIRED if we're introduced by AND or +; PROHIBITED if
// introduced by NOT or -; make sure not to set both.
prohibited = (mods == MOD_NOT);
required = (mods == MOD_REQ);
if (conj == CONJ_AND && !prohibited)
{
required = true;
}
}
else
{
// We set PROHIBITED if we're introduced by NOT or -; We set REQUIRED
// if not PROHIBITED and not introduced by OR
prohibited = (mods == MOD_NOT);
required = (!prohibited && conj != CONJ_OR);
}
clauses.Add(new BooleanClause(q, required, prohibited));
}
public override Query Combine(Query[] queries)
{
return Query.MergeBooleanQueries(queries);
}
public override Explanation Explain(Query query, int doc)
{
return query.Weight(this).Explain(reader, doc);
}
// inherit javadoc
public override void Search(Query query, Filter filter, HitCollector results)
{
HitCollector collector = results;
if (filter != null)
{
System.Collections.BitArray bits = filter.Bits(reader);
collector = new AnonymousClassHitCollector2(bits, results, this);
}
Scorer scorer = query.Weight(this).Scorer(reader);
if (scorer == null)
return ;
scorer.Score(collector);
}
/// <summary>Expert: called when re-writing queries under MultiSearcher.
///
/// <p>Only implemented by derived queries, with no
/// {@link #CreateWeight(Searcher)} implementatation.
/// </summary>
public virtual Query Combine(Query[] queries)
{
throw new System.NotSupportedException();
}
public override Query Rewrite(Query original)
{
Query[] queries = new Query[searchables.Length];
for (int i = 0; i < searchables.Length; i++)
{
queries[i] = searchables[i].Rewrite(original);
}
return original.Combine(queries);
}
public MultiSearcherThread(Monodoc.Lucene.Net.Search.Searchable searchable, Query query, Filter filter, int nDocs, FieldDocSortedHitQueue hq, Sort sort, int i, int[] starts, System.String name):base(name)
{
this.searchable = searchable;
this.query = query;
this.filter = filter;
this.nDocs = nDocs;
this.hq = hq;
this.i = i;
this.starts = starts;
this.sort = sort;
}
public virtual Explanation Explain(Query query, int doc)
{
return local.Explain(query, doc);
}
public virtual Query Rewrite(Query original)
{
return local.Rewrite(original);
}
public virtual TopFieldDocs Search(Query query, Filter filter, int n, Sort sort)
{
return local.Search(query, filter, n, sort);
}
public virtual TopDocs Search(Query query, Filter filter, int n)
{
return local.Search(query, filter, n);
}
public virtual void Search(Query query, Filter filter, HitCollector results)
{
local.Search(query, filter, results);
}
public override TopFieldDocs Search(Query query, Filter filter, int n, Sort sort)
{
FieldDocSortedHitQueue hq = null;
int totalHits = 0;
for (int i = 0; i < searchables.Length; i++)
{
// search each searcher
TopFieldDocs docs = searchables[i].Search(query, filter, n, sort);
if (hq == null)
hq = new FieldDocSortedHitQueue(docs.fields, n);
totalHits += docs.totalHits; // update totalHits
ScoreDoc[] scoreDocs = docs.scoreDocs;
for (int j = 0; j < scoreDocs.Length; j++)
{
// merge scoreDocs into hq
ScoreDoc scoreDoc = scoreDocs[j];
scoreDoc.doc += starts[i]; // convert doc
if (!hq.Insert(scoreDoc))
break; // no more scores > minScore
}
}
ScoreDoc[] scoreDocs2 = new ScoreDoc[hq.Size()];
for (int i = hq.Size() - 1; i >= 0; i--)
// put docs in array
scoreDocs2[i] = (ScoreDoc) hq.Pop();
return new TopFieldDocs(totalHits, scoreDocs2, hq.GetFields());
}
// inherit javadoc
public override void Search(Query query, Filter filter, HitCollector results)
{
for (int i = 0; i < searchables.Length; i++)
{
int start = starts[i];
searchables[i].Search(query, filter, new AnonymousClassHitCollector(results, start, this));
}
}
/// <summary>Constructs a filter which only matches documents matching
/// <code>query</code>.
/// </summary>
public QueryFilter(Query query)
{
this.query = query;
}
public override Explanation Explain(Query query, int doc)
{
int i = SubSearcher(doc); // find searcher index
return searchables[i].Explain(query, doc - starts[i]); // dispatch to searcher
}
/// <summary>Returns the documents matching <code>query</code>. </summary>
public Hits Search(Query query)
{
return Search(query, (Filter) null);
}
/// <summary>Expert: merges the clauses of a set of BooleanQuery's into a single
/// BooleanQuery.
///
/// <p>A utility for use by {@link #Combine(Query[])} implementations.
/// </summary>
public static Query MergeBooleanQueries(Query[] queries)
{
System.Collections.Hashtable allClauses = new System.Collections.Hashtable();
for (int i = 0; i < queries.Length; i++)
{
BooleanClause[] clauses = ((BooleanQuery) queries[i]).GetClauses();
for (int j = 0; j < clauses.Length; j++)
{
allClauses.Add(clauses[j], clauses[j]);
}
}
BooleanQuery result = new BooleanQuery();
foreach (BooleanClause booleanClause in allClauses.Keys)
{
result.Add(booleanClause);
}
return result;
}
/// <summary>Returns the documents matching <code>query</code> and
/// <code>filter</code>.
/// </summary>
public virtual Hits Search(Query query, Filter filter)
{
return new Hits(this, query, filter);
}
// inherit javadoc
public override TopFieldDocs Search(Query query, Filter filter, int nDocs, Sort sort)
{
Scorer scorer = query.Weight(this).Scorer(reader);
if (scorer == null)
return new TopFieldDocs(0, new ScoreDoc[0], sort.fields);
System.Collections.BitArray bits = filter != null ? filter.Bits(reader) : null;
FieldSortedHitQueue hq = new FieldSortedHitQueue(reader, sort.fields, nDocs);
int[] totalHits = new int[1];
scorer.Score(new AnonymousClassHitCollector1(bits, totalHits, hq, this));
ScoreDoc[] scoreDocs = new ScoreDoc[hq.Size()];
for (int i = hq.Size() - 1; i >= 0; i--)
// put docs in array
scoreDocs[i] = hq.FillFields((FieldDoc) hq.Pop());
return new TopFieldDocs(totalHits[0], scoreDocs, hq.GetFields());
}
/// <summary>Returns documents matching <code>query</code> sorted by
/// <code>sort</code>.
/// </summary>
public virtual Hits Search(Query query, Sort sort)
{
return new Hits(this, query, null, sort);
}
public override Query Rewrite(Query original)
{
Query query = original;
for (Query rewrittenQuery = query.Rewrite(reader); rewrittenQuery != query; rewrittenQuery = query.Rewrite(reader))
{
query = rewrittenQuery;
}
return query;
}
/// <summary>Returns documents matching <code>query</code> and <code>filter</code>,
/// sorted by <code>sort</code>.
/// </summary>
public virtual Hits Search(Query query, Filter filter, Sort sort)
{
return new Hits(this, query, filter, sort);
}
/// <summary> Constructs a new query which applies a filter to the results of the original query.
/// Filter.bits() will be called every time this query is used in a search.
/// </summary>
/// <param name="query"> Query to be filtered, cannot be <code>null</code>.
/// </param>
/// <param name="filter">Filter to apply to query results, cannot be <code>null</code>.
/// </param>
public FilteredQuery(Query query, Filter filter)
{
this.query = query;
this.filter = filter;
}
/// <summary>Lower-level search API.
///
/// <p>{@link HitCollector#Collect(int,float)} is called for every non-zero
/// scoring document.
///
/// <p>Applications should only use this if they need <i>all</i> of the
/// matching documents. The high-level search API ({@link
/// Searcher#Search(Query)}) is usually more efficient, as it skips
/// non-high-scoring hits.
/// <p>Note: The <code>score</code> passed to this method is a raw score.
/// In other words, the score will not necessarily be a float whose value is
/// between 0 and 1.
/// </summary>
public virtual void Search(Query query, HitCollector results)
{
Search(query, (Filter) null, results);
}
/// <summary>Adds a clause to a boolean query. Clauses may be:
/// <ul>
/// <li><code>required</code> which means that documents which <i>do not</i>
/// match this sub-query will <i>not</i> match the boolean query;
/// <li><code>prohibited</code> which means that documents which <i>do</i>
/// match this sub-query will <i>not</i> match the boolean query; or
/// <li>neither, in which case matched documents are neither prohibited from
/// nor required to match the sub-query. However, a document must match at
/// least 1 sub-query to match the boolean query.
/// </ul>
/// It is an error to specify a clause as both <code>required</code> and
/// <code>prohibited</code>.
///
/// </summary>
/// <seealso cref="#GetMaxClauseCount()">
/// </seealso>
public virtual void Add(Query query, bool required, bool prohibited)
{
Add(new BooleanClause(query, required, prohibited));
}
/// <summary>Constructs a BooleanClause with query <code>q</code>, required
/// <code>r</code> and prohibited <code>p</code>.
/// </summary>
public BooleanClause(Query q, bool r, bool p)
{
query = q;
required = r;
prohibited = p;
}