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Elasticsearch subproject :server
/*
* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
* or more contributor license agreements. Licensed under the Elastic License
* 2.0 and the Server Side Public License, v 1; you may not use this file except
* in compliance with, at your election, the Elastic License 2.0 or the Server
* Side Public License, v 1.
*/
package org.elasticsearch.search.aggregations.bucket.geogrid;
import org.apache.lucene.index.LeafReaderContext;
import org.apache.lucene.index.SortedNumericDocValues;
import org.elasticsearch.common.geo.GeoBoundingBox;
import org.elasticsearch.geometry.Rectangle;
import org.elasticsearch.index.fielddata.MultiGeoPointValues;
import org.elasticsearch.index.fielddata.SortedBinaryDocValues;
import org.elasticsearch.index.fielddata.SortedNumericDoubleValues;
import org.elasticsearch.search.aggregations.support.ValuesSource;
/**
* Class to help convert {@link MultiGeoPointValues}
* to GeoTile bucketing.
*/
public class GeoTileCellIdSource extends ValuesSource.Numeric {
private final GeoPoint valuesSource;
private final int precision;
private final GeoBoundingBox geoBoundingBox;
public GeoTileCellIdSource(GeoPoint valuesSource, int precision, GeoBoundingBox geoBoundingBox) {
this.valuesSource = valuesSource;
this.precision = precision;
this.geoBoundingBox = geoBoundingBox;
}
public int precision() {
return precision;
}
@Override
public boolean isFloatingPoint() {
return false;
}
@Override
public SortedNumericDocValues longValues(LeafReaderContext ctx) {
return geoBoundingBox.isUnbounded()
? new UnboundedCellValues(valuesSource.geoPointValues(ctx), precision)
: new BoundedCellValues(valuesSource.geoPointValues(ctx), precision, geoBoundingBox);
}
@Override
public SortedNumericDoubleValues doubleValues(LeafReaderContext ctx) {
throw new UnsupportedOperationException();
}
@Override
public SortedBinaryDocValues bytesValues(LeafReaderContext ctx) {
throw new UnsupportedOperationException();
}
private static class UnboundedCellValues extends CellValues {
UnboundedCellValues(MultiGeoPointValues geoValues, int precision) {
super(geoValues, precision);
}
@Override
int advanceValue(org.elasticsearch.common.geo.GeoPoint target, int valuesIdx) {
values[valuesIdx] = GeoTileUtils.longEncode(target.getLon(), target.getLat(), precision);
return valuesIdx + 1;
}
}
private static class BoundedCellValues extends CellValues {
private final boolean crossesDateline;
private final long tiles;
private final int minX, maxX, minY, maxY;
protected BoundedCellValues(MultiGeoPointValues geoValues, int precision, GeoBoundingBox bbox) {
super(geoValues, precision);
this.crossesDateline = bbox.right() < bbox.left();
this.tiles = 1L << precision;
// compute minX, minY
final int minX = GeoTileUtils.getXTile(bbox.left(), this.tiles);
final int minY = GeoTileUtils.getYTile(bbox.top(), this.tiles);
final Rectangle minTile = GeoTileUtils.toBoundingBox(minX, minY, precision);
// touching tiles are excluded, they need to share at least one interior point
this.minX = minTile.getMaxX() == bbox.left() ? minX + 1 : minX;
this.minY = minTile.getMinY() == bbox.top() ? minY + 1 : minY;
// compute maxX, maxY
final int maxX = GeoTileUtils.getXTile(bbox.right(), this.tiles);
final int maxY = GeoTileUtils.getYTile(bbox.bottom(), this.tiles);
final Rectangle maxTile = GeoTileUtils.toBoundingBox(maxX, maxY, precision);
// touching tiles are excluded, they need to share at least one interior point
this.maxX = maxTile.getMinX() == bbox.right() ? maxX - 1 : maxX;
this.maxY = maxTile.getMaxY() == bbox.bottom() ? maxY - 1 : maxY;
}
@Override
int advanceValue(org.elasticsearch.common.geo.GeoPoint target, int valuesIdx) {
final int x = GeoTileUtils.getXTile(target.getLon(), this.tiles);
final int y = GeoTileUtils.getYTile(target.getLat(), this.tiles);
if (validTile(x, y)) {
values[valuesIdx] = GeoTileUtils.longEncodeTiles(precision, x, y);
return valuesIdx + 1;
}
return valuesIdx;
}
private boolean validTile(int x, int y) {
if (maxY >= y && minY <= y) {
if (crossesDateline) {
return maxX >= x || minX <= x;
} else {
return maxX >= x && minX <= x;
}
}
return false;
}
}
}