| /* |
| * 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.solr.schema; |
| |
| import java.io.IOException; |
| |
| import org.apache.lucene.index.IndexableField; |
| import org.apache.lucene.queries.function.ValueSource; |
| import org.apache.lucene.queries.function.valuesource.LiteralValueSource; |
| import org.apache.lucene.search.Query; |
| import org.apache.lucene.search.SortField; |
| import org.apache.solr.response.TextResponseWriter; |
| import org.apache.solr.search.QParser; |
| import org.apache.solr.search.SolrConstantScoreQuery; |
| import org.apache.solr.search.SpatialOptions; |
| import org.apache.solr.search.function.ValueSourceRangeFilter; |
| import org.apache.solr.search.function.distance.GeohashHaversineFunction; |
| import org.apache.solr.uninverting.UninvertingReader.Type; |
| import org.apache.solr.util.SpatialUtils; |
| import org.locationtech.spatial4j.context.SpatialContext; |
| import org.locationtech.spatial4j.distance.DistanceUtils; |
| import org.locationtech.spatial4j.io.GeohashUtils; |
| import org.locationtech.spatial4j.shape.Point; |
| |
| /** |
| * This is a class that represents a <a |
| * href="http://en.wikipedia.org/wiki/Geohash">Geohash</a> field. The field is |
| * provided as a lat/lon pair and is internally represented as a string. |
| * |
| * @deprecated use {@link LatLonPointSpatialField} instead |
| */ |
| @Deprecated |
| public class GeoHashField extends FieldType implements SpatialQueryable { |
| |
| @Override |
| public SortField getSortField(SchemaField field, boolean top) { |
| return getStringSort(field, top); |
| } |
| |
| @Override |
| public Type getUninversionType(SchemaField sf) { |
| if (sf.multiValued()) { |
| return Type.SORTED_SET_BINARY; |
| } else { |
| return Type.SORTED; |
| } |
| } |
| |
| //QUESTION: Should we do a fast and crude one? Or actually check distances |
| //Fast and crude could use EdgeNGrams, but that would require a different |
| //encoding. Plus there are issues around the Equator/Prime Meridian |
| @Override |
| public Query createSpatialQuery(QParser parser, SpatialOptions options) { |
| String geohash = toInternal(options.pointStr); |
| //TODO: optimize this |
| return new SolrConstantScoreQuery(new ValueSourceRangeFilter(new GeohashHaversineFunction(getValueSource(options.field, parser), |
| new LiteralValueSource(geohash), options.radius), "0", String.valueOf(options.distance), true, true)); |
| } |
| |
| @Override |
| public void write(TextResponseWriter writer, String name, IndexableField f) |
| throws IOException { |
| writer.writeStr(name, toExternal(f), false); |
| } |
| |
| @Override |
| public String toExternal(IndexableField f) { |
| Point p = GeohashUtils.decode(f.stringValue(), SpatialContext.GEO); |
| return p.getY() + "," + p.getX(); |
| } |
| |
| @Override |
| public String toInternal(String val) { |
| Point point = SpatialUtils.parsePointSolrException(val, SpatialContext.GEO); |
| return GeohashUtils.encodeLatLon(point.getY(), point.getX()); |
| } |
| |
| @Override |
| public ValueSource getValueSource(SchemaField field, QParser parser) { |
| field.checkFieldCacheSource(); |
| return new StrFieldSource(field.name); |
| } |
| |
| @Override |
| public double getSphereRadius() { |
| return DistanceUtils.EARTH_MEAN_RADIUS_KM; |
| } |
| |
| } |