| /* |
| * 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. |
| */ |
| package org.apache.lucene.search.uhighlight; |
| |
| import java.io.IOException; |
| |
| import org.apache.lucene.index.LeafReader; |
| import org.apache.lucene.index.Terms; |
| import org.apache.lucene.search.highlight.TermVectorLeafReader; |
| |
| /** |
| * Uses term vectors that contain offsets. |
| * |
| * @lucene.internal |
| */ |
| public class TermVectorOffsetStrategy extends FieldOffsetStrategy { |
| |
| public TermVectorOffsetStrategy(UHComponents components) { |
| super(components); |
| } |
| |
| @Override |
| public UnifiedHighlighter.OffsetSource getOffsetSource() { |
| return UnifiedHighlighter.OffsetSource.TERM_VECTORS; |
| } |
| |
| @Override |
| public OffsetsEnum getOffsetsEnum(LeafReader reader, int docId, String content) throws IOException { |
| Terms tvTerms = reader.getTermVector(docId, getField()); |
| if (tvTerms == null) { |
| return OffsetsEnum.EMPTY; |
| } |
| |
| LeafReader singleDocReader = new TermVectorLeafReader(getField(), tvTerms); |
| return createOffsetsEnumFromReader( |
| new OverlaySingleDocTermsLeafReader( |
| reader, |
| singleDocReader, |
| getField(), |
| docId), |
| docId); |
| } |
| |
| } |