| using Lucene.Net.Analysis.TokenAttributes; |
| using Lucene.Net.Analysis.Util; |
| |
| namespace Lucene.Net.Analysis.Miscellaneous |
| { |
| /* |
| * 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> |
| /// Marks terms as keywords via the <see cref="KeywordAttribute"/>. Each token |
| /// contained in the provided set is marked as a keyword by setting |
| /// <see cref="KeywordAttribute.IsKeyword"/> to <c>true</c>. |
| /// </summary> |
| public sealed class SetKeywordMarkerFilter : KeywordMarkerFilter |
| { |
| private readonly ICharTermAttribute termAtt; |
| private readonly CharArraySet keywordSet; |
| |
| /// <summary> |
| /// Create a new <see cref="SetKeywordMarkerFilter"/>, that marks the current token as a |
| /// keyword if the tokens term buffer is contained in the given set via the |
| /// <see cref="KeywordAttribute"/>. |
| /// </summary> |
| /// <param name="in"> |
| /// <see cref="TokenStream"/> to filter </param> |
| /// <param name="keywordSet"> |
| /// the keywords set to lookup the current termbuffer </param> |
| public SetKeywordMarkerFilter(TokenStream @in, CharArraySet keywordSet) |
| : base(@in) |
| { |
| this.keywordSet = keywordSet; |
| termAtt = AddAttribute<ICharTermAttribute>(); |
| } |
| |
| protected override bool IsKeyword() |
| { |
| return keywordSet.Contains(termAtt.Buffer, 0, termAtt.Length); |
| } |
| } |
| } |