/* * 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.legacy; import java.io.IOException; import org.apache.lucene.index.DocValues; 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.locationtech.spatial4j.distance.DistanceCalculator; import org.locationtech.spatial4j.shape.Point; /** * An implementation of the Lucene ValueSource model that returns the distance * for a {@link PointVectorStrategy}. * * @lucene.internal */ public class DistanceValueSource extends DoubleValuesSource { private PointVectorStrategy strategy; private final Point from; private final double multiplier; private final double nullValue; /** * Constructor. */ public DistanceValueSource(PointVectorStrategy strategy, Point from, double multiplier) { this.strategy = strategy; this.from = from; this.multiplier = multiplier; this.nullValue = (strategy.getSpatialContext().isGeo() ? 180 * multiplier : Double.MAX_VALUE); } /** * Returns the ValueSource description. */ @Override public String toString() { return "DistanceValueSource("+strategy+", "+from+")"; } /** * Returns the FunctionValues used by the function query. */ @Override public DoubleValues getValues(LeafReaderContext readerContext, DoubleValues scores) throws IOException { final DoubleValues ptX = DoubleValuesSource.fromDoubleField(strategy.getFieldNameX()).getValues(readerContext, null); final DoubleValues ptY = DoubleValuesSource.fromDoubleField(strategy.getFieldNameY()).getValues(readerContext, null); final DistanceCalculator calculator = strategy.getSpatialContext().getDistCalc(); return DoubleValues.withDefault(new DoubleValues() { @Override public double doubleValue() throws IOException { return calculator.distance(from, ptX.doubleValue(), ptY.doubleValue()) * multiplier; } @Override public boolean advanceExact(int doc) throws IOException { return ptX.advanceExact(doc) && ptY.advanceExact(doc); } }, nullValue); } @Override public boolean needsScores() { return false; } @Override public boolean isCacheable(LeafReaderContext ctx) { return DocValues.isCacheable(ctx, strategy.getFieldNameX(), strategy.getFieldNameY()); } @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; DistanceValueSource that = (DistanceValueSource) o; if (!from.equals(that.from)) return false; if (!strategy.equals(that.strategy)) return false; if (multiplier != that.multiplier) return false; return true; } @Override public int hashCode() { return from.hashCode(); } }