| using Lucene.Net.Analysis; |
| using Lucene.Net.Analysis.TokenAttributes; |
| using Lucene.Net.Queries; |
| using Lucene.Net.Search; |
| using Lucene.Net.Util; |
| using System; |
| using System.Collections.Generic; |
| using System.IO; |
| using System.Xml; |
| |
| namespace Lucene.Net.QueryParsers.Xml.Builders |
| { |
| /* |
| * 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> |
| /// Builder for <see cref="TermsFilter"/> |
| /// </summary> |
| public class TermsFilterBuilder : IFilterBuilder |
| { |
| private readonly Analyzer analyzer; |
| |
| public TermsFilterBuilder(Analyzer analyzer) |
| { |
| this.analyzer = analyzer; |
| } |
| |
| /// <summary> |
| /// (non-Javadoc) |
| /// @see org.apache.lucene.xmlparser.FilterBuilder#process(org.w3c.dom.Element) |
| /// </summary> |
| public virtual Filter GetFilter(XmlElement e) |
| { |
| List<BytesRef> terms = new List<BytesRef>(); |
| string text = DOMUtils.GetNonBlankTextOrFail(e); |
| string fieldName = DOMUtils.GetAttributeWithInheritanceOrFail(e, "fieldName"); |
| |
| TokenStream ts = null; |
| try |
| { |
| ts = analyzer.GetTokenStream(fieldName, text); |
| ITermToBytesRefAttribute termAtt = ts.AddAttribute<ITermToBytesRefAttribute>(); |
| BytesRef bytes = termAtt.BytesRef; |
| ts.Reset(); |
| while (ts.IncrementToken()) |
| { |
| termAtt.FillBytesRef(); |
| terms.Add(BytesRef.DeepCopyOf(bytes)); |
| } |
| ts.End(); |
| } |
| catch (IOException ioe) |
| { |
| throw new Exception("Error constructing terms from index:" + ioe); |
| } |
| finally |
| { |
| IOUtils.DisposeWhileHandlingException(ts); |
| } |
| return new TermsFilter(fieldName, terms); |
| } |
| } |
| } |