/**
* 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.blur.manager;
import java.io.IOException;
import org.apache.blur.analysis.FieldManager;
import org.apache.blur.thrift.generated.HighlightOptions;
import org.apache.blur.thrift.generated.Selector;
import org.apache.blur.utils.HighlightHelper;
import org.apache.lucene.document.Document;
import org.apache.lucene.index.SegmentReader;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.highlight.InvalidTokenOffsetsException;
public class BlurHighlighter {
private final String _preTag;
private final String _postTag;
private final Query _highlightQuery;
private final FieldManager _fieldManager;
private final boolean _shouldHighlight;
public BlurHighlighter(Query highlightQuery, FieldManager fieldManager, Selector selector) {
HighlightOptions highlightOptions = selector.getHighlightOptions();
if (highlightOptions != null) {
_preTag = highlightOptions.getPreTag();
_postTag = highlightOptions.getPostTag();
if (highlightQuery == null) {
throw new RuntimeException("Highlight query cannot be null.");
}
_highlightQuery = highlightQuery;
if (fieldManager == null) {
throw new RuntimeException("FieldManager query cannot be null.");
}
_fieldManager = fieldManager;
_shouldHighlight = true;
} else {
_preTag = null;
_postTag = null;
_highlightQuery = null;
_fieldManager = null;
_shouldHighlight = false;
}
}
public BlurHighlighter() {
_preTag = null;
_postTag = null;
_highlightQuery = null;
_fieldManager = null;
_shouldHighlight = false;
}
public boolean shouldHighlight() {
return _shouldHighlight;
}
public String getPreTag() {
return _preTag;
}
public String getPostTag() {
return _postTag;
}
public Query getHighlightQuery() {
return _highlightQuery;
}
public FieldManager getFieldManager() {
return _fieldManager;
}
public Document highlight(int docID, Document document, SegmentReader segmentReader) throws IOException {
Document highlight;
try {
highlight = HighlightHelper.highlight(docID, document, _highlightQuery, _fieldManager, segmentReader, _preTag,
_postTag);
} catch (InvalidTokenOffsetsException e) {
throw new IOException(e);
}
return highlight;
}
}