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[GEO] Fork Lucene's LatLonShape Classes to local lucene package (#36794)
Lucene 7.6 uses a smaller encoding for LatLonShape. This commit forks the LatLonShape classes to Elasticsearch's local lucene package. These classes will be removed on the release of Lucene 7.6.
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server/src/main/java/org/apache/lucene/document/XLatLonShape.java
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/* | ||
* 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.document; | ||
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import org.apache.lucene.geo.GeoUtils; | ||
import org.apache.lucene.geo.Line; | ||
import org.apache.lucene.geo.Polygon; | ||
import org.apache.lucene.geo.XTessellator; | ||
import org.apache.lucene.geo.XTessellator.Triangle; | ||
import org.apache.lucene.index.PointValues; | ||
import org.apache.lucene.search.Query; | ||
import org.apache.lucene.util.BytesRef; | ||
import org.apache.lucene.util.NumericUtils; | ||
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import java.util.ArrayList; | ||
import java.util.List; | ||
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import static org.apache.lucene.geo.GeoEncodingUtils.encodeLatitude; | ||
import static org.apache.lucene.geo.GeoEncodingUtils.encodeLongitude; | ||
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/** | ||
* An indexed shape utility class. | ||
* <p> | ||
* {@link Polygon}'s are decomposed into a triangular mesh using the {@link XTessellator} utility class | ||
* Each {@link Triangle} is encoded and indexed as a multi-value field. | ||
* <p> | ||
* Finding all shapes that intersect a range (e.g., bounding box) at search time is efficient. | ||
* <p> | ||
* This class defines static factory methods for common operations: | ||
* <ul> | ||
* <li>{@link #createIndexableFields(String, Polygon)} for matching polygons that intersect a bounding box. | ||
* <li>{@link #newBoxQuery newBoxQuery()} for matching polygons that intersect a bounding box. | ||
* </ul> | ||
* <b>WARNING</b>: Like {@link LatLonPoint}, vertex values are indexed with some loss of precision from the | ||
* original {@code double} values (4.190951585769653E-8 for the latitude component | ||
* and 8.381903171539307E-8 for longitude). | ||
* @see PointValues | ||
* @see LatLonDocValuesField | ||
* | ||
* @lucene.experimental | ||
*/ | ||
public class XLatLonShape { | ||
public static final int BYTES = LatLonPoint.BYTES; | ||
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protected static final FieldType TYPE = new FieldType(); | ||
static { | ||
TYPE.setDimensions(7, 4, BYTES); | ||
TYPE.freeze(); | ||
} | ||
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// no instance: | ||
private XLatLonShape() { | ||
} | ||
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/** create indexable fields for polygon geometry */ | ||
public static Field[] createIndexableFields(String fieldName, Polygon polygon) { | ||
// the lionshare of the indexing is done by the tessellator | ||
List<Triangle> tessellation = XTessellator.tessellate(polygon); | ||
List<LatLonTriangle> fields = new ArrayList<>(); | ||
for (Triangle t : tessellation) { | ||
fields.add(new LatLonTriangle(fieldName, t)); | ||
} | ||
return fields.toArray(new Field[fields.size()]); | ||
} | ||
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/** create indexable fields for line geometry */ | ||
public static Field[] createIndexableFields(String fieldName, Line line) { | ||
int numPoints = line.numPoints(); | ||
Field[] fields = new Field[numPoints - 1]; | ||
// create "flat" triangles | ||
for (int i = 0, j = 1; j < numPoints; ++i, ++j) { | ||
fields[i] = new LatLonTriangle(fieldName, line.getLat(i), line.getLon(i), line.getLat(j), line.getLon(j), | ||
line.getLat(i), line.getLon(i)); | ||
} | ||
return fields; | ||
} | ||
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/** create indexable fields for point geometry */ | ||
public static Field[] createIndexableFields(String fieldName, double lat, double lon) { | ||
return new Field[] {new LatLonTriangle(fieldName, lat, lon, lat, lon, lat, lon)}; | ||
} | ||
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/** create a query to find all polygons that intersect a defined bounding box | ||
**/ | ||
public static Query newBoxQuery(String field, QueryRelation queryRelation, | ||
double minLatitude, double maxLatitude, double minLongitude, double maxLongitude) { | ||
return new XLatLonShapeBoundingBoxQuery(field, queryRelation, minLatitude, maxLatitude, minLongitude, maxLongitude); | ||
} | ||
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/** create a query to find all polygons that intersect a provided linestring (or array of linestrings) | ||
* note: does not support dateline crossing | ||
**/ | ||
public static Query newLineQuery(String field, QueryRelation queryRelation, Line... lines) { | ||
return new XLatLonShapeLineQuery(field, queryRelation, lines); | ||
} | ||
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/** create a query to find all polygons that intersect a provided polygon (or array of polygons) | ||
* note: does not support dateline crossing | ||
**/ | ||
public static Query newPolygonQuery(String field, QueryRelation queryRelation, Polygon... polygons) { | ||
return new XLatLonShapePolygonQuery(field, queryRelation, polygons); | ||
} | ||
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/** polygons are decomposed into tessellated triangles using {@link XTessellator} | ||
* these triangles are encoded and inserted as separate indexed POINT fields | ||
*/ | ||
private static class LatLonTriangle extends Field { | ||
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LatLonTriangle(String name, double aLat, double aLon, double bLat, double bLon, double cLat, double cLon) { | ||
super(name, TYPE); | ||
setTriangleValue(encodeLongitude(aLon), encodeLatitude(aLat), encodeLongitude(bLon), encodeLatitude(bLat), | ||
encodeLongitude(cLon), encodeLatitude(cLat)); | ||
} | ||
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LatLonTriangle(String name, Triangle t) { | ||
super(name, TYPE); | ||
setTriangleValue(t.getEncodedX(0), t.getEncodedY(0), t.getEncodedX(1), t.getEncodedY(1), | ||
t.getEncodedX(2), t.getEncodedY(2)); | ||
} | ||
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public void setTriangleValue(int aX, int aY, int bX, int bY, int cX, int cY) { | ||
final byte[] bytes; | ||
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if (fieldsData == null) { | ||
bytes = new byte[7 * BYTES]; | ||
fieldsData = new BytesRef(bytes); | ||
} else { | ||
bytes = ((BytesRef) fieldsData).bytes; | ||
} | ||
encodeTriangle(bytes, aY, aX, bY, bX, cY, cX); | ||
} | ||
} | ||
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/** Query Relation Types **/ | ||
public enum QueryRelation { | ||
INTERSECTS, WITHIN, DISJOINT | ||
} | ||
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private static final int MINY_MINX_MAXY_MAXX_Y_X = 0; | ||
private static final int MINY_MINX_Y_X_MAXY_MAXX = 1; | ||
private static final int MAXY_MINX_Y_X_MINY_MAXX = 2; | ||
private static final int MAXY_MINX_MINY_MAXX_Y_X = 3; | ||
private static final int Y_MINX_MINY_X_MAXY_MAXX = 4; | ||
private static final int Y_MINX_MINY_MAXX_MAXY_X = 5; | ||
private static final int MAXY_MINX_MINY_X_Y_MAXX = 6; | ||
private static final int MINY_MINX_Y_MAXX_MAXY_X = 7; | ||
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/** | ||
* A triangle is encoded using 6 points and an extra point with encoded information in three bits of how to reconstruct it. | ||
* Triangles are encoded with CCW orientation and might be rotated to limit the number of possible reconstructions to 2^3. | ||
* Reconstruction always happens from west to east. | ||
*/ | ||
public static void encodeTriangle(byte[] bytes, int aLat, int aLon, int bLat, int bLon, int cLat, int cLon) { | ||
assert bytes.length == 7 * BYTES; | ||
int aX; | ||
int bX; | ||
int cX; | ||
int aY; | ||
int bY; | ||
int cY; | ||
//change orientation if CW | ||
if (GeoUtils.orient(aLon, aLat, bLon, bLat, cLon, cLat) == -1) { | ||
aX = cLon; | ||
bX = bLon; | ||
cX = aLon; | ||
aY = cLat; | ||
bY = bLat; | ||
cY = aLat; | ||
} else { | ||
aX = aLon; | ||
bX = bLon; | ||
cX = cLon; | ||
aY = aLat; | ||
bY = bLat; | ||
cY = cLat; | ||
} | ||
//rotate edges and place minX at the beginning | ||
if (bX < aX || cX < aX) { | ||
if (bX < cX) { | ||
int tempX = aX; | ||
int tempY = aY; | ||
aX = bX; | ||
aY = bY; | ||
bX = cX; | ||
bY = cY; | ||
cX = tempX; | ||
cY = tempY; | ||
} else if (cX < aX) { | ||
int tempX = aX; | ||
int tempY = aY; | ||
aX = cX; | ||
aY = cY; | ||
cX = bX; | ||
cY = bY; | ||
bX = tempX; | ||
bY = tempY; | ||
} | ||
} else if (aX == bX && aX == cX) { | ||
//degenerated case, all points with same longitude | ||
//we need to prevent that aX is in the middle (not part of the MBS) | ||
if (bY < aY || cY < aY) { | ||
if (bY < cY) { | ||
int tempX = aX; | ||
int tempY = aY; | ||
aX = bX; | ||
aY = bY; | ||
bX = cX; | ||
bY = cY; | ||
cX = tempX; | ||
cY = tempY; | ||
} else if (cY < aY) { | ||
int tempX = aX; | ||
int tempY = aY; | ||
aX = cX; | ||
aY = cY; | ||
cX = bX; | ||
cY = bY; | ||
bX = tempX; | ||
bY = tempY; | ||
} | ||
} | ||
} | ||
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int minX = aX; | ||
int minY = StrictMath.min(aY, StrictMath.min(bY, cY)); | ||
int maxX = StrictMath.max(aX, StrictMath.max(bX, cX)); | ||
int maxY = StrictMath.max(aY, StrictMath.max(bY, cY)); | ||
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int bits, x, y; | ||
if (minY == aY) { | ||
if (maxY == bY && maxX == bX) { | ||
y = cY; | ||
x = cX; | ||
bits = MINY_MINX_MAXY_MAXX_Y_X; | ||
} else if (maxY == cY && maxX == cX) { | ||
y = bY; | ||
x = bX; | ||
bits = MINY_MINX_Y_X_MAXY_MAXX; | ||
} else { | ||
y = bY; | ||
x = cX; | ||
bits = MINY_MINX_Y_MAXX_MAXY_X; | ||
} | ||
} else if (maxY == aY) { | ||
if (minY == bY && maxX == bX) { | ||
y = cY; | ||
x = cX; | ||
bits = MAXY_MINX_MINY_MAXX_Y_X; | ||
} else if (minY == cY && maxX == cX) { | ||
y = bY; | ||
x = bX; | ||
bits = MAXY_MINX_Y_X_MINY_MAXX; | ||
} else { | ||
y = cY; | ||
x = bX; | ||
bits = MAXY_MINX_MINY_X_Y_MAXX; | ||
} | ||
} else if (maxX == bX && minY == bY) { | ||
y = aY; | ||
x = cX; | ||
bits = Y_MINX_MINY_MAXX_MAXY_X; | ||
} else if (maxX == cX && maxY == cY) { | ||
y = aY; | ||
x = bX; | ||
bits = Y_MINX_MINY_X_MAXY_MAXX; | ||
} else { | ||
throw new IllegalArgumentException("Could not encode the provided triangle"); | ||
} | ||
NumericUtils.intToSortableBytes(minY, bytes, 0); | ||
NumericUtils.intToSortableBytes(minX, bytes, BYTES); | ||
NumericUtils.intToSortableBytes(maxY, bytes, 2 * BYTES); | ||
NumericUtils.intToSortableBytes(maxX, bytes, 3 * BYTES); | ||
NumericUtils.intToSortableBytes(y, bytes, 4 * BYTES); | ||
NumericUtils.intToSortableBytes(x, bytes, 5 * BYTES); | ||
NumericUtils.intToSortableBytes(bits, bytes, 6 * BYTES); | ||
} | ||
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/** | ||
* Decode a triangle encoded by {@link XLatLonShape#encodeTriangle(byte[], int, int, int, int, int, int)}. | ||
*/ | ||
public static void decodeTriangle(byte[] t, int[] triangle) { | ||
assert triangle.length == 6; | ||
int bits = NumericUtils.sortableBytesToInt(t, 6 * XLatLonShape.BYTES); | ||
//extract the first three bits | ||
int tCode = (((1 << 3) - 1) & (bits >> 0)); | ||
switch (tCode) { | ||
case MINY_MINX_MAXY_MAXX_Y_X: | ||
triangle[0] = NumericUtils.sortableBytesToInt(t, 0 * XLatLonShape.BYTES); | ||
triangle[1] = NumericUtils.sortableBytesToInt(t, 1 * XLatLonShape.BYTES); | ||
triangle[2] = NumericUtils.sortableBytesToInt(t, 2 * XLatLonShape.BYTES); | ||
triangle[3] = NumericUtils.sortableBytesToInt(t, 3 * XLatLonShape.BYTES); | ||
triangle[4] = NumericUtils.sortableBytesToInt(t, 4 * XLatLonShape.BYTES); | ||
triangle[5] = NumericUtils.sortableBytesToInt(t, 5 * XLatLonShape.BYTES); | ||
break; | ||
case MINY_MINX_Y_X_MAXY_MAXX: | ||
triangle[0] = NumericUtils.sortableBytesToInt(t, 0 * XLatLonShape.BYTES); | ||
triangle[1] = NumericUtils.sortableBytesToInt(t, 1 * XLatLonShape.BYTES); | ||
triangle[2] = NumericUtils.sortableBytesToInt(t, 4 * XLatLonShape.BYTES); | ||
triangle[3] = NumericUtils.sortableBytesToInt(t, 5 * XLatLonShape.BYTES); | ||
triangle[4] = NumericUtils.sortableBytesToInt(t, 2 * XLatLonShape.BYTES); | ||
triangle[5] = NumericUtils.sortableBytesToInt(t, 3 * XLatLonShape.BYTES); | ||
break; | ||
case MAXY_MINX_Y_X_MINY_MAXX: | ||
triangle[0] = NumericUtils.sortableBytesToInt(t, 2 * XLatLonShape.BYTES); | ||
triangle[1] = NumericUtils.sortableBytesToInt(t, 1 * XLatLonShape.BYTES); | ||
triangle[2] = NumericUtils.sortableBytesToInt(t, 4 * XLatLonShape.BYTES); | ||
triangle[3] = NumericUtils.sortableBytesToInt(t, 5 * XLatLonShape.BYTES); | ||
triangle[4] = NumericUtils.sortableBytesToInt(t, 0 * XLatLonShape.BYTES); | ||
triangle[5] = NumericUtils.sortableBytesToInt(t, 3 * XLatLonShape.BYTES); | ||
break; | ||
case MAXY_MINX_MINY_MAXX_Y_X: | ||
triangle[0] = NumericUtils.sortableBytesToInt(t, 2 * XLatLonShape.BYTES); | ||
triangle[1] = NumericUtils.sortableBytesToInt(t, 1 * XLatLonShape.BYTES); | ||
triangle[2] = NumericUtils.sortableBytesToInt(t, 0 * XLatLonShape.BYTES); | ||
triangle[3] = NumericUtils.sortableBytesToInt(t, 3 * XLatLonShape.BYTES); | ||
triangle[4] = NumericUtils.sortableBytesToInt(t, 4 * XLatLonShape.BYTES); | ||
triangle[5] = NumericUtils.sortableBytesToInt(t, 5 * XLatLonShape.BYTES); | ||
break; | ||
case Y_MINX_MINY_X_MAXY_MAXX: | ||
triangle[0] = NumericUtils.sortableBytesToInt(t, 4 * XLatLonShape.BYTES); | ||
triangle[1] = NumericUtils.sortableBytesToInt(t, 1 * XLatLonShape.BYTES); | ||
triangle[2] = NumericUtils.sortableBytesToInt(t, 0 * XLatLonShape.BYTES); | ||
triangle[3] = NumericUtils.sortableBytesToInt(t, 5 * XLatLonShape.BYTES); | ||
triangle[4] = NumericUtils.sortableBytesToInt(t, 2 * XLatLonShape.BYTES); | ||
triangle[5] = NumericUtils.sortableBytesToInt(t, 3 * XLatLonShape.BYTES); | ||
break; | ||
case Y_MINX_MINY_MAXX_MAXY_X: | ||
triangle[0] = NumericUtils.sortableBytesToInt(t, 4 * XLatLonShape.BYTES); | ||
triangle[1] = NumericUtils.sortableBytesToInt(t, 1 * XLatLonShape.BYTES); | ||
triangle[2] = NumericUtils.sortableBytesToInt(t, 0 * XLatLonShape.BYTES); | ||
triangle[3] = NumericUtils.sortableBytesToInt(t, 3 * XLatLonShape.BYTES); | ||
triangle[4] = NumericUtils.sortableBytesToInt(t, 2 * XLatLonShape.BYTES); | ||
triangle[5] = NumericUtils.sortableBytesToInt(t, 5 * XLatLonShape.BYTES); | ||
break; | ||
case MAXY_MINX_MINY_X_Y_MAXX: | ||
triangle[0] = NumericUtils.sortableBytesToInt(t, 2 * XLatLonShape.BYTES); | ||
triangle[1] = NumericUtils.sortableBytesToInt(t, 1 * XLatLonShape.BYTES); | ||
triangle[2] = NumericUtils.sortableBytesToInt(t, 0 * XLatLonShape.BYTES); | ||
triangle[3] = NumericUtils.sortableBytesToInt(t, 5 * XLatLonShape.BYTES); | ||
triangle[4] = NumericUtils.sortableBytesToInt(t, 4 * XLatLonShape.BYTES); | ||
triangle[5] = NumericUtils.sortableBytesToInt(t, 3 * XLatLonShape.BYTES); | ||
break; | ||
case MINY_MINX_Y_MAXX_MAXY_X: | ||
triangle[0] = NumericUtils.sortableBytesToInt(t, 0 * XLatLonShape.BYTES); | ||
triangle[1] = NumericUtils.sortableBytesToInt(t, 1 * XLatLonShape.BYTES); | ||
triangle[2] = NumericUtils.sortableBytesToInt(t, 4 * XLatLonShape.BYTES); | ||
triangle[3] = NumericUtils.sortableBytesToInt(t, 3 * XLatLonShape.BYTES); | ||
triangle[4] = NumericUtils.sortableBytesToInt(t, 2 * XLatLonShape.BYTES); | ||
triangle[5] = NumericUtils.sortableBytesToInt(t, 5 * XLatLonShape.BYTES); | ||
break; | ||
default: | ||
throw new IllegalArgumentException("Could not decode the provided triangle"); | ||
} | ||
//Points of the decoded triangle must be co-planar or CCW oriented | ||
assert GeoUtils.orient(triangle[1], triangle[0], triangle[3], triangle[2], triangle[5], triangle[4]) >= 0; | ||
} | ||
} |
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