| using Lucene.Net.Index; |
| using Lucene.Net.Search; |
| using System.Collections.Generic; |
| |
| namespace Lucene.Net.QueryParsers.Surround.Query |
| { |
| /* |
| * 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. |
| */ |
| |
| internal class SimpleTermRewriteQuery : RewriteQuery<SimpleTerm> |
| { |
| public SimpleTermRewriteQuery( |
| SimpleTerm srndQuery, |
| string fieldName, |
| BasicQueryFactory qf) |
| : base(srndQuery, fieldName, qf) |
| { |
| } |
| |
| public override Search.Query Rewrite(IndexReader reader) |
| { |
| var luceneSubQueries = new List<Search.Query>(); |
| m_srndQuery.VisitMatchingTerms(reader, m_fieldName, |
| new SimpleTermRewriteMatchingTermVisitor(luceneSubQueries, m_qf)); |
| return (luceneSubQueries.Count == 0) ? SrndQuery.TheEmptyLcnQuery |
| : (luceneSubQueries.Count == 1) ? luceneSubQueries[0] |
| : SrndBooleanQuery.MakeBooleanQuery( |
| /* luceneSubQueries all have default weight */ |
| luceneSubQueries, Occur.SHOULD); /* OR the subquery terms */ |
| } |
| |
| internal class SimpleTermRewriteMatchingTermVisitor : SimpleTerm.IMatchingTermVisitor |
| { |
| private readonly IList<Search.Query> luceneSubQueries; |
| private readonly BasicQueryFactory qf; |
| |
| public SimpleTermRewriteMatchingTermVisitor(IList<Search.Query> luceneSubQueries, BasicQueryFactory qf) |
| { |
| this.luceneSubQueries = luceneSubQueries; |
| this.qf = qf; |
| } |
| |
| public void VisitMatchingTerm(Term term) |
| { |
| luceneSubQueries.Add(qf.NewTermQuery(term)); |
| } |
| } |
| } |
| } |