| using System.Collections.Generic; |
| using System.Text; |
| |
| namespace Lucene.Net.Search |
| { |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| using AtomicReaderContext = Lucene.Net.Index.AtomicReaderContext; |
| using IBits = Lucene.Net.Util.IBits; |
| using IndexReader = Lucene.Net.Index.IndexReader; |
| using Term = Lucene.Net.Index.Term; |
| using ToStringUtils = Lucene.Net.Util.ToStringUtils; |
| |
| /// <summary> |
| /// A query that matches all documents. |
| /// </summary> |
| public class MatchAllDocsQuery : Query |
| { |
| private class MatchAllScorer : Scorer |
| { |
| private readonly MatchAllDocsQuery outerInstance; |
| |
| internal readonly float score; |
| private int doc = -1; |
| private readonly int maxDoc; |
| private readonly IBits liveDocs; |
| |
| internal MatchAllScorer(MatchAllDocsQuery outerInstance, IndexReader reader, IBits liveDocs, Weight w, float score) |
| : base(w) |
| { |
| this.outerInstance = outerInstance; |
| this.liveDocs = liveDocs; |
| this.score = score; |
| maxDoc = reader.MaxDoc; |
| } |
| |
| public override int DocID => doc; |
| |
| public override int NextDoc() |
| { |
| doc++; |
| while (liveDocs != null && doc < maxDoc && !liveDocs.Get(doc)) |
| { |
| doc++; |
| } |
| if (doc == maxDoc) |
| { |
| doc = NO_MORE_DOCS; |
| } |
| return doc; |
| } |
| |
| public override float GetScore() |
| { |
| return score; |
| } |
| |
| public override int Freq => 1; |
| |
| public override int Advance(int target) |
| { |
| doc = target - 1; |
| return NextDoc(); |
| } |
| |
| public override long GetCost() |
| { |
| return maxDoc; |
| } |
| } |
| |
| private class MatchAllDocsWeight : Weight |
| { |
| private readonly MatchAllDocsQuery outerInstance; |
| |
| private float queryWeight; |
| private float queryNorm; |
| |
| public MatchAllDocsWeight(MatchAllDocsQuery outerInstance, IndexSearcher searcher) |
| { |
| this.outerInstance = outerInstance; |
| } |
| |
| public override string ToString() |
| { |
| return "weight(" + outerInstance + ")"; |
| } |
| |
| public override Query Query => outerInstance; |
| |
| public override float GetValueForNormalization() |
| { |
| queryWeight = outerInstance.Boost; |
| return queryWeight * queryWeight; |
| } |
| |
| public override void Normalize(float queryNorm, float topLevelBoost) |
| { |
| this.queryNorm = queryNorm * topLevelBoost; |
| queryWeight *= this.queryNorm; |
| } |
| |
| public override Scorer GetScorer(AtomicReaderContext context, IBits acceptDocs) |
| { |
| return new MatchAllScorer(outerInstance, context.Reader, acceptDocs, this, queryWeight); |
| } |
| |
| public override Explanation Explain(AtomicReaderContext context, int doc) |
| { |
| // explain query weight |
| Explanation queryExpl = new ComplexExplanation(true, queryWeight, "MatchAllDocsQuery, product of:"); |
| if (outerInstance.Boost != 1.0f) |
| { |
| queryExpl.AddDetail(new Explanation(outerInstance.Boost, "boost")); |
| } |
| queryExpl.AddDetail(new Explanation(queryNorm, "queryNorm")); |
| |
| return queryExpl; |
| } |
| } |
| |
| public override Weight CreateWeight(IndexSearcher searcher) |
| { |
| return new MatchAllDocsWeight(this, searcher); |
| } |
| |
| public override void ExtractTerms(ISet<Term> terms) |
| { |
| } |
| |
| public override string ToString(string field) |
| { |
| StringBuilder buffer = new StringBuilder(); |
| buffer.Append("*:*"); |
| buffer.Append(ToStringUtils.Boost(Boost)); |
| return buffer.ToString(); |
| } |
| |
| public override bool Equals(object o) |
| { |
| if (!(o is MatchAllDocsQuery)) |
| { |
| return false; |
| } |
| MatchAllDocsQuery other = (MatchAllDocsQuery)o; |
| return this.Boost == other.Boost; |
| } |
| |
| public override int GetHashCode() |
| { |
| return J2N.BitConversion.SingleToInt32Bits(Boost) ^ 0x1AA71190; |
| } |
| } |
| } |