content: package org.apache.solr.search;
  /**
   * 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.
   */
  
  import org.apache.solr.common.params.SolrParams;
  import org.apache.solr.common.util.NamedList;
  import org.apache.solr.request.SolrQueryRequest;
  
  /**
   * Creates a spatial Filter based on the type of spatial point used.
   * <p/>
   * The field must implement {@link org.apache.solr.schema.SpatialQueryable}
   * <p/>
   * All units are in Kilometers
   * <p/>
   * <p/>
   * Syntax:
   * <pre>{!geofilt sfield=&lt;location_field&gt; pt=&lt;lat,lon&gt; d=&lt;distance&gt;}</pre>
   * <p/>
   * Parameters:
   * <ul>
   * <li>sfield - The field to filter on. Required.</li>
   * <li>pt - The point to use as a reference.  Must match the dimension of the field. Required.</li>
   * <li>d - The distance in km.  Requited.</li>
   * </ul>
   * The distance measure used currently depends on the FieldType.  LatLonType defaults to using haversine, PointType defaults to Euclidean (2-norm).
   *
   * <p/>
   * Examples:
   * <pre>fq={!geofilt sfield=store pt=10.312,-20.556 d=3.5}</pre>
   * <pre>fq={!geofilt sfield=store}&pt=10.312,-20&d=3.5</pre>
   * <pre>fq={!geofilt}&sfield=store&pt=10.312,-20&d=3.5</pre>
   * <p/>
   * Note: The geofilt for LatLonType is capable of also producing scores equal to the computed distance from the point
   * to the field, making it useful as a component of the main query or a boosting query.
   */
  public class SpatialFilterQParserPlugin extends QParserPlugin {
    public static String NAME = "geofilt";
  
    @Override
    public QParser createParser(String qstr, SolrParams localParams,
                                SolrParams params, SolrQueryRequest req) {
  
      return new SpatialFilterQParser(qstr, localParams, params, req, false);
    }
  
    public void init(NamedList args) {
  
    }
  
  }
  
  