/*
* 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.impl;
import org.hibernate.search.bridge.spi.NullMarker;
import org.hibernate.search.elasticsearch.logging.impl.Log;
import org.hibernate.search.elasticsearch.nulls.codec.impl.ElasticsearchAsTokenStringNullMarkerCodec;
import org.hibernate.search.elasticsearch.nulls.codec.impl.ElasticsearchBooleanNullMarkerCodec;
import org.hibernate.search.elasticsearch.nulls.codec.impl.ElasticsearchDoubleNullMarkerCodec;
import org.hibernate.search.elasticsearch.nulls.codec.impl.ElasticsearchFloatNullMarkerCodec;
import org.hibernate.search.elasticsearch.nulls.codec.impl.ElasticsearchIntegerNullMarkerCodec;
import org.hibernate.search.elasticsearch.nulls.codec.impl.ElasticsearchLongNullMarkerCodec;
import org.hibernate.search.elasticsearch.nulls.codec.impl.ElasticsearchAsNullStringNullMarkerCodec;
import org.hibernate.search.elasticsearch.util.impl.FieldHelper;
import org.hibernate.search.elasticsearch.util.impl.FieldHelper.ExtendedFieldType;
import org.hibernate.search.engine.metadata.impl.PartialDocumentFieldMetadata;
import org.hibernate.search.engine.nulls.codec.impl.NullMarkerCodec;
import org.hibernate.search.engine.nulls.impl.MissingValueStrategy;
import org.hibernate.search.util.logging.impl.LoggerFactory;
public final class Elasticsearch5MissingValueStrategy implements MissingValueStrategy {
private static final Log LOG = LoggerFactory.make( Log.class );
public static final Elasticsearch5MissingValueStrategy INSTANCE = new Elasticsearch5MissingValueStrategy();
@Override
public NullMarkerCodec createNullMarkerCodec(Class<?> entityType,
PartialDocumentFieldMetadata fieldMetadata, NullMarker nullMarker) {
Object nullEncoded = nullMarker.nullEncoded();
if ( nullEncoded instanceof String ) {
if ( isTextDataType( fieldMetadata ) ) {
/*
* The "text" datatype does not support null_value,
* which implies a slightly different null value handling
* on our side.
*/
return new ElasticsearchAsTokenStringNullMarkerCodec( nullMarker );
}
else {
return new ElasticsearchAsNullStringNullMarkerCodec( nullMarker );
}
}
else if ( nullEncoded instanceof Integer ) {
return new ElasticsearchIntegerNullMarkerCodec( nullMarker );
}
else if ( nullEncoded instanceof Long ) {
return new ElasticsearchLongNullMarkerCodec( nullMarker );
}
else if ( nullEncoded instanceof Float ) {
return new ElasticsearchFloatNullMarkerCodec( nullMarker );
}
else if ( nullEncoded instanceof Double ) {
return new ElasticsearchDoubleNullMarkerCodec( nullMarker );
}
else if ( nullEncoded instanceof Boolean ) {
return new ElasticsearchBooleanNullMarkerCodec( nullMarker );
}
else {
throw LOG.unsupportedNullTokenType( entityType, fieldMetadata.getPath().getAbsoluteName(),
nullEncoded.getClass() );
}
}
@SuppressWarnings("deprecation")
private boolean isTextDataType(PartialDocumentFieldMetadata fieldMetadata) {
// The text datatype is always analyzed, otherwise we use the "keyword" datatype
if ( fieldMetadata.getIndex().isAnalyzed() ) {
ExtendedFieldType fieldType = FieldHelper.getType( fieldMetadata );
if ( ExtendedFieldType.STRING.equals( fieldType )
// We also use strings when the type is unknown
|| ExtendedFieldType.UNKNOWN.equals( fieldType ) ) {
return true;
}
}
return false;
}
}