| /* |
| * 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.lucene.spatial.util; |
| |
| import java.io.IOException; |
| |
| import org.apache.lucene.index.LeafReaderContext; |
| import org.apache.lucene.search.DoubleValues; |
| import org.apache.lucene.search.DoubleValuesSource; |
| import org.apache.lucene.search.IndexSearcher; |
| import org.apache.lucene.spatial.ShapeValues; |
| import org.apache.lucene.spatial.ShapeValuesSource; |
| import org.locationtech.spatial4j.context.SpatialContext; |
| import org.locationtech.spatial4j.distance.DistanceCalculator; |
| import org.locationtech.spatial4j.shape.Point; |
| |
| /** |
| * The distance from a provided Point to a Point retrieved from an ShapeValuesSource. The distance |
| * is calculated via a {@link org.locationtech.spatial4j.distance.DistanceCalculator}. |
| * |
| * @lucene.experimental |
| */ |
| public class DistanceToShapeValueSource extends DoubleValuesSource { |
| |
| private final ShapeValuesSource shapeValueSource; |
| private final Point queryPoint; |
| private final double multiplier; |
| private final DistanceCalculator distCalc; |
| |
| //TODO if DoubleValues returns NaN; will things be ok? |
| private final double nullValue; |
| |
| public DistanceToShapeValueSource(ShapeValuesSource shapeValueSource, Point queryPoint, |
| double multiplier, SpatialContext ctx) { |
| this.shapeValueSource = shapeValueSource; |
| this.queryPoint = queryPoint; |
| this.multiplier = multiplier; |
| this.distCalc = ctx.getDistCalc(); |
| this.nullValue = (ctx.isGeo() ? 180 * multiplier : Double.MAX_VALUE); |
| } |
| |
| @Override |
| public String toString() { |
| return "distance(" + queryPoint + " to " + shapeValueSource.toString() + ")*" + multiplier + ")"; |
| } |
| |
| @Override |
| public DoubleValues getValues(LeafReaderContext readerContext, DoubleValues scores) throws IOException { |
| |
| final ShapeValues shapeValues = shapeValueSource.getValues(readerContext); |
| |
| return DoubleValues.withDefault(new DoubleValues() { |
| @Override |
| public double doubleValue() throws IOException { |
| return distCalc.distance(queryPoint, shapeValues.value().getCenter()) * multiplier; |
| } |
| |
| @Override |
| public boolean advanceExact(int doc) throws IOException { |
| return shapeValues.advanceExact(doc); |
| } |
| }, nullValue); |
| } |
| |
| @Override |
| public boolean needsScores() { |
| return false; |
| } |
| |
| @Override |
| public boolean isCacheable(LeafReaderContext ctx) { |
| return shapeValueSource.isCacheable(ctx); |
| } |
| |
| @Override |
| public DoubleValuesSource rewrite(IndexSearcher searcher) throws IOException { |
| return this; |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) return true; |
| if (o == null || getClass() != o.getClass()) return false; |
| |
| DistanceToShapeValueSource that = (DistanceToShapeValueSource) o; |
| |
| if (!queryPoint.equals(that.queryPoint)) return false; |
| if (Double.compare(that.multiplier, multiplier) != 0) return false; |
| if (!shapeValueSource.equals(that.shapeValueSource)) return false; |
| if (!distCalc.equals(that.distCalc)) return false; |
| |
| return true; |
| } |
| |
| @Override |
| public int hashCode() { |
| int result; |
| long temp; |
| result = shapeValueSource.hashCode(); |
| result = 31 * result + queryPoint.hashCode(); |
| temp = Double.doubleToLongBits(multiplier); |
| result = 31 * result + (int) (temp ^ (temp >>> 32)); |
| return result; |
| } |
| } |