/* * Copyright 2004 The Apache Software Foundation * * Licensed 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 System; using Lucene.Net.Index; namespace Lucene.Net.Search { sealed class ExactPhraseScorer:PhraseScorer { internal ExactPhraseScorer(Weight weight, TermPositions[] tps, int[] positions, Similarity similarity, byte[] norms) : base(weight, tps, positions, similarity, norms) { } protected internal override float PhraseFreq() { // sort list with pq for (PhrasePositions pp = first; pp != null; pp = pp.next) { pp.FirstPosition(); pq.Put(pp); // build pq from list } PqToList(); // rebuild list from pq int freq = 0; do { // find position w/ all terms while (first.position < last.position) { // scan forward in first do { if (!first.NextPosition()) { return (float) freq; } } while (first.position < last.position); FirstToLast(); } freq++; // all equal: a match } while (last.NextPosition()); return (float) freq; } } }