/*
* 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.hibernate.search.bridge.LuceneOptions;
import org.hibernate.search.bridge.spi.NullMarker;
import org.hibernate.search.elasticsearch.nulls.impl.ElasticsearchNullMarkerField;
import org.hibernate.search.engine.nulls.codec.impl.NullMarkerCodec;
/**
* A base class for {@link NullMarkerCodec}s that index null values as the JSON "null" value.
*
* @author Yoann Rodiere
*/
public abstract class ElasticsearchAsNullNullMarkerCodec implements NullMarkerCodec {
protected final NullMarker nullMarker;
public ElasticsearchAsNullNullMarkerCodec(NullMarker nullMarker) {
super();
this.nullMarker = nullMarker;
}
@Override
public NullMarker getNullMarker() {
return nullMarker;
}
@Override
public void encodeNullValue(String fieldName, Document document, LuceneOptions luceneOptions) {
document.add( new ElasticsearchNullMarkerField( fieldName, nullMarker ) );
}
@Override
public boolean representsNullValue(IndexableField field) {
/*
* Never true: null value are absent from _source when projecting, so we can't have an
* IndexableField representing a null value in the resulting document.
*/
return false;
}
@Override
public String toString() {
return getClass().getSimpleName() + "[" + nullMarker + "]";
}
}