/*
* Hibernate Search, full-text search for your domain model
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later
* See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
*/
package org.hibernate.search.elasticsearch.nulls.codec.impl;
import org.apache.lucene.document.Document;
import org.apache.lucene.index.IndexableField;
import org.apache.lucene.index.Term;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.TermQuery;
import org.apache.lucene.util.BytesRef;
import org.hibernate.search.bridge.LuceneOptions;
import org.hibernate.search.bridge.spi.NullMarker;
import org.hibernate.search.engine.nulls.codec.impl.NullMarkerCodec;
/**
* A {@link NullMarkerCodec}s that index null values as the string token itself.
* <p>
* This is necessary because Elasticsearch doesn't support 'null_value' on the 'text' datatype.
*
* @author Sanne Grinovero
*/
public class ElasticsearchAsTokenStringNullMarkerCodec extends ElasticsearchAsTokenNullMarkerCodec {
private final BytesRef encodedToken;
public ElasticsearchAsTokenStringNullMarkerCodec(NullMarker nullMarker) {
super( nullMarker );
this.encodedToken = new BytesRef( (String) nullMarker.nullEncoded() );
}
@Override
public void encodeNullValue(String name, Document document, LuceneOptions luceneOptions) {
luceneOptions.addFieldToDocument( name, (String) nullMarker.nullEncoded(), document );
}
@Override
public Query createNullMatchingQuery(String fieldName) {
return new TermQuery( new Term( fieldName, encodedToken ) );
}
@Override
public boolean representsNullValue(IndexableField field) {
String stringValue = field.stringValue();
return nullMarker.nullEncoded().equals( stringValue );
}
}