| using Lucene.Net.Diagnostics; |
| using Lucene.Net.Queries.Function; |
| using Lucene.Net.Queries.Function.DocValues; |
| using Lucene.Net.Search; |
| using System; |
| using System.Diagnostics; |
| using System.IO; |
| |
| namespace Lucene.Net.Expressions |
| { |
| /* |
| * 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> |
| /// A utility class to allow expressions to access the score as a |
| /// <see cref="Lucene.Net.Queries.Function.FunctionValues"/>. |
| /// </summary> |
| internal class ScoreFunctionValues : DoubleDocValues |
| { |
| internal readonly Scorer scorer; |
| |
| internal ScoreFunctionValues(ValueSource parent, Scorer scorer) |
| : base(parent) |
| { |
| this.scorer = scorer; |
| } |
| |
| public override double DoubleVal(int document) |
| { |
| try |
| { |
| if (Debugging.AssertsEnabled) Debugging.Assert(document == scorer.DocID); |
| return scorer.GetScore(); |
| } |
| catch (IOException exception) |
| { |
| throw new Exception(exception.ToString(), exception); |
| } |
| } |
| } |
| } |