| using System.Collections.Generic; |
| using JCG = J2N.Collections.Generic; |
| |
| namespace Lucene.Net.Util |
| { |
| /* |
| * 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> |
| /// Helper class for keeping Lists of Objects associated with keys. <b>WARNING: this CLASS IS NOT THREAD SAFE</b> |
| /// <para/> |
| /// @lucene.internal |
| /// </summary> |
| public class MapOfSets<TKey, TValue> |
| { |
| private readonly IDictionary<TKey, ISet<TValue>> theMap; |
| |
| /// <param name="m"> The backing store for this object. </param> |
| public MapOfSets(IDictionary<TKey, ISet<TValue>> m) |
| { |
| theMap = m; |
| } |
| |
| /// <returns> Direct access to the map backing this object. </returns> |
| public virtual IDictionary<TKey, ISet<TValue>> Map => theMap; |
| |
| /// <summary> |
| /// Adds <paramref name="val"/> to the <see cref="ISet{T}"/> associated with key in the <see cref="IDictionary{TKey, TValue}"/>. |
| /// If <paramref name="key"/> is not |
| /// already in the map, a new <see cref="ISet{T}"/> will first be created. </summary> |
| /// <returns> The size of the <see cref="ISet{T}"/> associated with key once val is added to it. </returns> |
| public virtual int Put(TKey key, TValue val) |
| { |
| // LUCENENET: Eliminated extra lookup by using TryGetValue instead of ContainsKey |
| if (!theMap.TryGetValue(key, out ISet<TValue> theSet)) |
| { |
| theMap[key] = theSet = new JCG.HashSet<TValue>(); |
| } |
| theSet.Add(val); |
| return theSet.Count; |
| } |
| |
| /// <summary> |
| /// Adds multiple <paramref name="vals"/> to the <see cref="ISet{T}"/> associated with key in the <see cref="IDictionary{TKey, TValue}"/>. |
| /// If <paramref name="key"/> is not |
| /// already in the map, a new <see cref="ISet{T}"/> will first be created. </summary> |
| /// <returns> The size of the <see cref="ISet{T}"/> associated with key once val is added to it. </returns> |
| public virtual int PutAll(TKey key, IEnumerable<TValue> vals) |
| { |
| // LUCENENET: Eliminated extra lookup by using TryGetValue instead of ContainsKey |
| if (!theMap.TryGetValue(key, out ISet<TValue> theSet)) |
| { |
| theMap[key] = theSet = new JCG.HashSet<TValue>(); |
| } |
| theSet.UnionWith(vals); |
| return theSet.Count; |
| } |
| } |
| } |