/*
* 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 java.util.Collections;
import java.util.List;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.util.BytesRef;
import org.apache.lucene.util.automaton.CharacterRunAutomaton;
/**
* Never returns offsets. Used when the query would highlight nothing.
*
* @lucene.internal
*/
public class NoOpOffsetStrategy extends FieldOffsetStrategy {
public static final NoOpOffsetStrategy INSTANCE = new NoOpOffsetStrategy();
private NoOpOffsetStrategy() {
super("_ignored_", new BytesRef[0], PhraseHelper.NONE, new CharacterRunAutomaton[0]);
}
@Override
public UnifiedHighlighter.OffsetSource getOffsetSource() {
return UnifiedHighlighter.OffsetSource.NONE_NEEDED;
}
@Override
public List<OffsetsEnum> getOffsetsEnums(IndexReader reader, int docId, String content) throws IOException {
return Collections.emptyList();
}
}