| namespace Lucene.Net.Index |
| { |
| /* |
| * 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. |
| */ |
| |
| // javadocs |
| using BytesRef = Lucene.Net.Util.BytesRef; |
| |
| /// <summary> |
| /// Subclass of FilteredTermsEnum for enumerating a single term. |
| /// <p> |
| /// For example, this can be used by <seealso cref="MultiTermQuery"/>s |
| /// that need only visit one term, but want to preserve |
| /// MultiTermQuery semantics such as {@link |
| /// MultiTermQuery#getRewriteMethod}. |
| /// </summary> |
| public sealed class SingleTermsEnum : FilteredTermsEnum |
| { |
| private readonly BytesRef SingleRef; |
| |
| /// <summary> |
| /// Creates a new <code>SingleTermsEnum</code>. |
| /// <p> |
| /// After calling the constructor the enumeration is already pointing to the term, |
| /// if it exists. |
| /// </summary> |
| public SingleTermsEnum(TermsEnum tenum, BytesRef termText) |
| : base(tenum) |
| { |
| SingleRef = termText; |
| InitialSeekTerm = termText; |
| } |
| |
| protected internal override AcceptStatus Accept(BytesRef term) |
| { |
| return term.Equals(SingleRef) ? AcceptStatus.YES : AcceptStatus.END; |
| } |
| } |
| } |