| using J2N.Text; |
| using Lucene.Net.Index; |
| using System; |
| using System.Text; |
| |
| 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. |
| */ |
| |
| /// <summary> |
| /// Base class for queries that expand to sets of simple terms. |
| /// </summary> |
| public abstract class SimpleTerm : SrndQuery, IDistanceSubQuery, IComparable<SimpleTerm> |
| { |
| protected SimpleTerm(bool q) // LUCENENET: CA1012: Abstract types should not have constructors (marked protected) |
| { |
| quoted = q; |
| } |
| |
| private readonly bool quoted; // LUCENENET: marked readonly |
| internal bool IsQuoted => quoted; |
| |
| public virtual string Quote => "\""; |
| public virtual string FieldOperator => "/"; |
| |
| public abstract string ToStringUnquoted(); |
| |
| [Obsolete("deprecated (March 2011) Not normally used, to be removed from Lucene 4.0. This class implementing Comparable is to be removed at the same time.")] |
| public int CompareTo(SimpleTerm ost) |
| { |
| /* for ordering terms and prefixes before using an index, not used */ |
| return this.ToStringUnquoted().CompareToOrdinal(ost.ToStringUnquoted()); |
| } |
| |
| protected virtual void SuffixToString(StringBuilder r) { } /* override for prefix query */ |
| |
| |
| public override string ToString() |
| { |
| StringBuilder r = new StringBuilder(); |
| if (IsQuoted) |
| { |
| r.Append(Quote); |
| } |
| r.Append(ToStringUnquoted()); |
| if (IsQuoted) |
| { |
| r.Append(Quote); |
| } |
| SuffixToString(r); |
| WeightToString(r); |
| return r.ToString(); |
| } |
| |
| public abstract void VisitMatchingTerms( |
| IndexReader reader, |
| string fieldName, |
| IMatchingTermVisitor mtv); |
| |
| /// <summary> |
| /// Callback to visit each matching term during "rewrite" |
| /// in <see cref="VisitMatchingTerm(Term)"/> |
| /// </summary> |
| public interface IMatchingTermVisitor |
| { |
| void VisitMatchingTerm(Term t); |
| } |
| |
| public virtual string DistanceSubQueryNotAllowed() |
| { |
| return null; |
| } |
| |
| public virtual void AddSpanQueries(SpanNearClauseFactory sncf) |
| { |
| VisitMatchingTerms( |
| sncf.IndexReader, |
| sncf.FieldName, |
| new AddSpanQueriesMatchingTermVisitor(sncf, Weight)); |
| } |
| |
| internal class AddSpanQueriesMatchingTermVisitor : IMatchingTermVisitor |
| { |
| private readonly SpanNearClauseFactory sncf; |
| private readonly float weight; |
| |
| public AddSpanQueriesMatchingTermVisitor(SpanNearClauseFactory sncf, float weight) |
| { |
| this.sncf = sncf; |
| this.weight = weight; |
| } |
| |
| public void VisitMatchingTerm(Term term) |
| { |
| sncf.AddTermWeighted(term, weight); |
| } |
| } |
| |
| public override Search.Query MakeLuceneQueryFieldNoBoost(string fieldName, BasicQueryFactory qf) |
| { |
| return new SimpleTermRewriteQuery(this, fieldName, qf); |
| } |
| } |
| } |