| using Lucene.Net.Index; |
| using Lucene.Net.Search; |
| using System.Collections; |
| using System.Collections.Generic; |
| using System.Text; |
| using JCG = J2N.Collections.Generic; |
| |
| 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> |
| /// Abstract parent class for <see cref="ValueSource"/> implementations that wrap multiple |
| /// <see cref="ValueSource"/>s and apply their own logic. |
| /// </summary> |
| public abstract class MultiFunction : ValueSource |
| { |
| protected readonly IList<ValueSource> m_sources; |
| |
| protected MultiFunction(IList<ValueSource> sources) |
| { |
| this.m_sources = sources; |
| } |
| |
| protected abstract string Name { get; } |
| |
| public override string GetDescription() |
| { |
| return GetDescription(Name, m_sources); |
| } |
| |
| public static string GetDescription(string name, IList<ValueSource> sources) |
| { |
| var sb = new StringBuilder(); |
| sb.Append(name).Append('('); |
| bool firstTime = true; |
| foreach (ValueSource source in sources) |
| { |
| if (firstTime) |
| { |
| firstTime = false; |
| } |
| else |
| { |
| sb.Append(','); |
| } |
| sb.Append((object)source); |
| } |
| sb.Append(')'); |
| return sb.ToString(); |
| } |
| |
| public static FunctionValues[] ValsArr(IList<ValueSource> sources, IDictionary fcontext, AtomicReaderContext readerContext) |
| { |
| var valsArr = new FunctionValues[sources.Count]; |
| int i = 0; |
| foreach (var source in sources) |
| { |
| valsArr[i++] = source.GetValues(fcontext, readerContext); |
| } |
| return valsArr; |
| } |
| |
| public class Values : FunctionValues |
| { |
| private readonly MultiFunction outerInstance; |
| |
| internal readonly FunctionValues[] valsArr; |
| |
| public Values(MultiFunction outerInstance, FunctionValues[] valsArr) |
| { |
| this.outerInstance = outerInstance; |
| this.valsArr = valsArr; |
| } |
| |
| public override string ToString(int doc) |
| { |
| return MultiFunction.ToString(outerInstance.Name, valsArr, doc); |
| } |
| } |
| |
| |
| public static string ToString(string name, FunctionValues[] valsArr, int doc) |
| { |
| var sb = new StringBuilder(); |
| sb.Append(name).Append('('); |
| bool firstTime = true; |
| foreach (FunctionValues vals in valsArr) |
| { |
| if (firstTime) |
| { |
| firstTime = false; |
| } |
| else |
| { |
| sb.Append(','); |
| } |
| sb.Append(vals.ToString(doc)); |
| } |
| sb.Append(')'); |
| return sb.ToString(); |
| } |
| |
| public override void CreateWeight(IDictionary context, IndexSearcher searcher) |
| { |
| foreach (ValueSource source in m_sources) |
| { |
| source.CreateWeight(context, searcher); |
| } |
| } |
| |
| public override int GetHashCode() |
| { |
| // LUCENENET specific: use structural equality comparison |
| return JCG.ListEqualityComparer<ValueSource>.Default.GetHashCode(m_sources) + Name.GetHashCode(); |
| } |
| |
| public override bool Equals(object o) |
| { |
| if (this.GetType() != o.GetType()) |
| { |
| return false; |
| } |
| var other = (MultiFunction)o; |
| |
| // LUCENENET specific: use structural equality comparison |
| return JCG.ListEqualityComparer<ValueSource>.Default.Equals(this.m_sources, other.m_sources); |
| } |
| } |
| } |