/*
* 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.
*/
using System;
using Lucene.Net.Search;
using Lucene.Net.Spatial.GeoHash;
namespace Lucene.Net.Spatial.Tier
{
public class DistanceQueryBuilder
{
///
/// Create a distance query using
/// a boundary box wrapper around a more precise
/// DistanceFilter.
///
/// The lat.
/// The Lng.
/// The miles.
/// The lat field.
/// The Lng field.
/// The tier field prefix.
/// if set to true [need precise].
public DistanceQueryBuilder(double lat, double lng, double miles, string latField, string lngField, string tierFieldPrefix, bool needPrecise)
{
Lat = lat;
Lng = lng;
Miles = miles;
var cpf = new CartesianPolyFilterBuilder(tierFieldPrefix);
Filter cartesianFilter = cpf.GetBoundingArea(lat, lng, miles);
/* create precise distance filter */
if (needPrecise)
{
_filter = DistanceFilter = new LatLongDistanceFilter(cartesianFilter, miles, lat, lng, latField, lngField);
}
else
{
_filter = cartesianFilter;
DistanceFilter = null;
}
}
///
/// Create a distance query using
/// a boundary box wrapper around a more precise
/// DistanceFilter.
///
/// The lat.
/// The Lng.
/// The miles.
/// The geo hash field prefix.
/// The tier field prefix.
/// if set to true [need precise].
public DistanceQueryBuilder(double lat, double lng, double miles, string geoHashFieldPrefix, String tierFieldPrefix, bool needPrecise)
{
Lat = lat;
Lng = lng;
Miles = miles;
var cpf = new CartesianPolyFilterBuilder(tierFieldPrefix);
Filter cartesianFilter = cpf.GetBoundingArea(lat, lng, miles);
/* create precise distance filter */
if (needPrecise)
{
_filter = DistanceFilter = new GeoHashDistanceFilter(cartesianFilter, lat, lng, miles, geoHashFieldPrefix);
}
else
{
_filter = cartesianFilter;
DistanceFilter = null;
}
}
public double Lat { get; private set; }
public double Lng { get; private set; }
public double Miles { get; private set; }
public DistanceFilter DistanceFilter { get; private set; }
private readonly Filter _filter;
public Filter Filter
{
get
{
if (DistanceFilter != null)
{
DistanceFilter.Reset();
}
return _filter;
}
}
public Filter GetFilter(Query query)
{
throw new NotImplementedException("Relies on ChainedFilter (contrib/misc). Do we need this?"); //{{rogchap}}
// Chain the Query (as filter) with our distance filter
/*if (_distanceFilter != null)
{
_distanceFilter.Reset();
}
var qf = new QueryWrapperFilter(query);
return new ChainedFilter(new [] { qf, _filter }, ChainedFilter.AND);
*/
}
public Query GetQuery(Query query)
{
return new ConstantScoreQuery(GetFilter(query));
}
public override string ToString()
{
return "DistanceQuery lat: " + Lat + " lng: " + Lng + " miles: " + Miles;
}
}
}