| using Lucene.Net.Search; |
| using System; |
| |
| namespace Lucene.Net.Queries.Function.ValueSources |
| { |
| /* |
| * 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 base class for <see cref="ValueSource"/> implementations that retrieve values for |
| /// a single field from the <see cref="Search.FieldCache"/>. |
| /// </summary> |
| public abstract class FieldCacheSource : ValueSource |
| { |
| protected readonly string m_field; |
| protected readonly IFieldCache m_cache = Search.FieldCache.DEFAULT; |
| |
| protected FieldCacheSource(string field) // LUCENENET: CA1012: Abstract types should not have constructors (marked protected) |
| { |
| this.m_field = field; |
| } |
| |
| public virtual IFieldCache FieldCache => m_cache; |
| |
| public virtual string Field => m_field; |
| |
| public override string GetDescription() |
| { |
| return m_field; |
| } |
| |
| public override bool Equals(object o) |
| { |
| if (o is null) return false; |
| if (!(o is FieldCacheSource other)) return false; |
| return m_field.Equals(other.m_field, StringComparison.Ordinal) && m_cache == other.m_cache; |
| } |
| |
| public override int GetHashCode() |
| { |
| return m_cache.GetHashCode() + m_field.GetHashCode(); |
| } |
| } |
| } |