| using Lucene.Net.Index; |
| using System.Collections.Generic; |
| using System.Diagnostics; |
| using JCG = J2N.Collections.Generic; |
| |
| namespace Lucene.Net.Search.Spans |
| { |
| /* |
| * 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 IndexReaderContext = Lucene.Net.Index.IndexReaderContext; |
| using ReaderUtil = Lucene.Net.Index.ReaderUtil; |
| using Term = Lucene.Net.Index.Term; |
| using TermContext = Lucene.Net.Index.TermContext; |
| |
| /// |
| /// <summary> |
| /// A wrapper to perform span operations on a non-leaf reader context |
| /// <p> |
| /// NOTE: this should be used for testing purposes only |
| /// @lucene.internal |
| /// </summary> |
| public class MultiSpansWrapper : Spans // can't be package private due to payloads |
| { |
| private readonly SpanQuery Query; |
| private readonly IList<AtomicReaderContext> Leaves; |
| private int LeafOrd = 0; |
| private Spans Current; |
| private readonly IDictionary<Term, TermContext> TermContexts; |
| private readonly int NumLeaves; |
| |
| private MultiSpansWrapper(IList<AtomicReaderContext> leaves, SpanQuery query, IDictionary<Term, TermContext> termContexts) |
| { |
| this.Query = query; |
| this.Leaves = leaves; |
| this.NumLeaves = leaves.Count; |
| this.TermContexts = termContexts; |
| } |
| |
| public static Spans Wrap(IndexReaderContext topLevelReaderContext, SpanQuery query) |
| { |
| IDictionary<Term, TermContext> termContexts = new Dictionary<Term, TermContext>(); |
| JCG.SortedSet<Term> terms = new JCG.SortedSet<Term>(); |
| query.ExtractTerms(terms); |
| foreach (Term term in terms) |
| { |
| termContexts[term] = TermContext.Build(topLevelReaderContext, term); |
| } |
| IList<AtomicReaderContext> leaves = topLevelReaderContext.Leaves; |
| if (leaves.Count == 1) |
| { |
| AtomicReaderContext ctx = leaves[0]; |
| return query.GetSpans(ctx, ((AtomicReader)ctx.Reader).LiveDocs, termContexts); |
| } |
| return new MultiSpansWrapper(leaves, query, termContexts); |
| } |
| |
| public override bool Next() |
| { |
| if (LeafOrd >= NumLeaves) |
| { |
| return false; |
| } |
| if (Current == null) |
| { |
| AtomicReaderContext ctx = Leaves[LeafOrd]; |
| Current = Query.GetSpans(ctx, ((AtomicReader)ctx.Reader).LiveDocs, TermContexts); |
| } |
| while (true) |
| { |
| if (Current.Next()) |
| { |
| return true; |
| } |
| if (++LeafOrd < NumLeaves) |
| { |
| AtomicReaderContext ctx = Leaves[LeafOrd]; |
| Current = Query.GetSpans(ctx, ((AtomicReader)ctx.Reader).LiveDocs, TermContexts); |
| } |
| else |
| { |
| Current = null; |
| break; |
| } |
| } |
| return false; |
| } |
| |
| public override bool SkipTo(int target) |
| { |
| if (LeafOrd >= NumLeaves) |
| { |
| return false; |
| } |
| |
| int subIndex = ReaderUtil.SubIndex(target, Leaves); |
| Debug.Assert(subIndex >= LeafOrd); |
| if (subIndex != LeafOrd) |
| { |
| AtomicReaderContext ctx = Leaves[subIndex]; |
| Current = Query.GetSpans(ctx, ((AtomicReader)ctx.Reader).LiveDocs, TermContexts); |
| LeafOrd = subIndex; |
| } |
| else if (Current == null) |
| { |
| AtomicReaderContext ctx = Leaves[LeafOrd]; |
| Current = Query.GetSpans(ctx, ((AtomicReader)ctx.Reader).LiveDocs, TermContexts); |
| } |
| while (true) |
| { |
| if (target < Leaves[LeafOrd].DocBase) |
| { |
| // target was in the previous slice |
| if (Current.Next()) |
| { |
| return true; |
| } |
| } |
| else if (Current.SkipTo(target - Leaves[LeafOrd].DocBase)) |
| { |
| return true; |
| } |
| if (++LeafOrd < NumLeaves) |
| { |
| AtomicReaderContext ctx = Leaves[LeafOrd]; |
| Current = Query.GetSpans(ctx, ((AtomicReader)ctx.Reader).LiveDocs, TermContexts); |
| } |
| else |
| { |
| Current = null; |
| break; |
| } |
| } |
| |
| return false; |
| } |
| |
| public override int Doc |
| { |
| get |
| { |
| if (Current == null) |
| { |
| return DocIdSetIterator.NO_MORE_DOCS; |
| } |
| return Current.Doc + Leaves[LeafOrd].DocBase; |
| } |
| } |
| |
| public override int Start |
| { |
| get |
| { |
| if (Current == null) |
| { |
| return DocIdSetIterator.NO_MORE_DOCS; |
| } |
| return Current.Start; |
| } |
| } |
| |
| public override int End |
| { |
| get |
| { |
| if (Current == null) |
| { |
| return DocIdSetIterator.NO_MORE_DOCS; |
| } |
| return Current.End; |
| } |
| } |
| |
| public override ICollection<byte[]> GetPayload() |
| { |
| if (Current == null) |
| { |
| return new List<byte[]>(); |
| } |
| return Current.GetPayload(); |
| } |
| |
| public override bool IsPayloadAvailable |
| { |
| get |
| { |
| if (Current == null) |
| { |
| return false; |
| } |
| return Current.IsPayloadAvailable; |
| } |
| } |
| |
| public override long GetCost() |
| { |
| return int.MaxValue; // just for tests |
| } |
| } |
| } |