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Core of the Object/Lucene mapper, query engine and index management

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/*
 * 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 .
 */
package org.hibernate.search.spatial;

import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.hibernate.search.bridge.LuceneOptions;
import org.hibernate.search.bridge.spi.FieldMetadataBuilder;
import org.hibernate.search.bridge.spi.FieldType;
import org.hibernate.search.spatial.impl.SpatialNumericDocValueField;

/**
 * Hibernate Search field bridge using Range Spatial, binding a Coordinates to two numeric fields for latitude and Longitude
 *
 * @author Nicolas Helleringer
 */
public class SpatialFieldBridgeByRange extends SpatialFieldBridge {

	public SpatialFieldBridgeByRange() {
	}

	public SpatialFieldBridgeByRange(String latitudeField, String longitudeField) {
		super( latitudeField, longitudeField );
	}

	@Override
	public void configureFieldMetadata(String name, FieldMetadataBuilder builder) {
		super.configureFieldMetadata( name, builder );

		builder.field( latitudeIndexedFieldName, FieldType.DOUBLE );
		builder.field( longitudeIndexedFieldName, FieldType.DOUBLE );
	}

	/**
	 * Actual overridden method that does the indexing
	 *
	 * @param name of the field
	 * @param value of the field
	 * @param document document being indexed
	 * @param luceneOptions current indexing options and accessors
	 */
	@Override
	public void set(String name, Object value, Document document, LuceneOptions luceneOptions) {
		if ( value != null ) {

			Double latitude = getLatitude( value );
			Double longitude = getLongitude( value );

			if ( ( latitude != null ) && ( longitude != null ) ) {
				luceneOptions.addNumericFieldToDocument(
						latitudeIndexedFieldName,
						latitude,
						document
				);

				luceneOptions.addNumericFieldToDocument(
						longitudeIndexedFieldName,
						longitude,
						document
				);

				Field latitudeDocValuesField = new SpatialNumericDocValueField( latitudeIndexedFieldName, latitude );
				document.add( latitudeDocValuesField );

				Field longitudeDocValuesField = new SpatialNumericDocValueField( longitudeIndexedFieldName, longitude );
				document.add( longitudeDocValuesField );
			}
		}
	}
}