mirror of
https://github.com/scm-manager/scm-manager.git
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105 lines
4.0 KiB
Java
105 lines
4.0 KiB
Java
/*
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* MIT License
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*
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* Copyright (c) 2020-present Cloudogu GmbH and Contributors
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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package sonia.scm.search;
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import org.apache.lucene.analysis.Analyzer;
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import org.apache.lucene.document.Document;
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import org.apache.lucene.search.IndexSearcher;
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import org.apache.lucene.search.Query;
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import org.apache.lucene.search.ScoreDoc;
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import org.apache.lucene.search.TopDocs;
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import org.apache.lucene.search.highlight.Highlighter;
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import org.apache.lucene.search.highlight.InvalidTokenOffsetsException;
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import org.apache.lucene.search.highlight.QueryScorer;
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import org.apache.lucene.search.highlight.SimpleHTMLFormatter;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.Optional;
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import static java.util.Optional.empty;
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import static java.util.Optional.of;
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public class QueryResultFactory {
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private final Analyzer analyzer;
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private final Highlighter highlighter;
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private final IndexSearcher searcher;
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private final LuceneSearchableType searchableType;
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public QueryResultFactory(Analyzer analyzer, IndexSearcher searcher, LuceneSearchableType searchableType, Query query) {
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this.analyzer = analyzer;
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this.searcher = searcher;
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this.searchableType = searchableType;
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this.highlighter = createHighlighter(query);
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}
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private Highlighter createHighlighter(Query query) {
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return new Highlighter(
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new SimpleHTMLFormatter("<>", "</>"),
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new QueryScorer(query)
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);
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}
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public QueryResult create(TopDocs topDocs) throws IOException, InvalidTokenOffsetsException {
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List<Hit> hits = new ArrayList<>();
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for (ScoreDoc scoreDoc : topDocs.scoreDocs) {
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hits.add(createHit(scoreDoc));
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}
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return new QueryResult(topDocs.totalHits.value, searchableType.getType(), hits);
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}
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private Hit createHit(ScoreDoc scoreDoc) throws IOException, InvalidTokenOffsetsException {
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Document document = searcher.doc(scoreDoc.doc);
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Map<String, Hit.Field> fields = new HashMap<>();
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for (LuceneSearchableField field : searchableType.getFields()) {
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field(document, field).ifPresent(f -> fields.put(field.getName(), f));
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}
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return new Hit(document.get(FieldNames.ID), document.get(FieldNames.REPOSITORY), scoreDoc.score, fields);
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}
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private Optional<Hit.Field> field(Document document, LuceneSearchableField field) throws IOException, InvalidTokenOffsetsException {
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Object value = field.value(document);
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if (value != null) {
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if (field.isHighlighted()) {
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String[] fragments = createFragments(field, value.toString());
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if (fragments.length > 0) {
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return of(new Hit.HighlightedField(fragments));
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}
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}
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return of(new Hit.ValueField(value));
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}
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return empty();
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}
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private String[] createFragments(LuceneSearchableField field, String value) throws InvalidTokenOffsetsException, IOException {
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return highlighter.getBestFragments(analyzer, field.getName(), value, 5);
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}
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}
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