org.elasticsearch.common.geo.builders.MultiPolygonBuilder Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of elasticsearch Show documentation
Show all versions of elasticsearch Show documentation
Elasticsearch subproject :server
/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.elasticsearch.common.geo.builders;
import org.elasticsearch.common.geo.GeoShapeType;
import org.elasticsearch.common.geo.parsers.ShapeParser;
import org.elasticsearch.common.geo.parsers.GeoWKTParser;
import org.locationtech.spatial4j.shape.Shape;
import com.vividsolutions.jts.geom.Coordinate;
import org.elasticsearch.common.geo.XShapeCollection;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.xcontent.XContentBuilder;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
import java.util.Objects;
public class MultiPolygonBuilder extends ShapeBuilder {
public static final GeoShapeType TYPE = GeoShapeType.MULTIPOLYGON;
private final List polygons = new ArrayList<>();
private final Orientation orientation;
/**
* Build a MultiPolygonBuilder with RIGHT orientation.
*/
public MultiPolygonBuilder() {
this(Orientation.RIGHT);
}
/**
* Build a MultiPolygonBuilder with an arbitrary orientation.
*/
public MultiPolygonBuilder(Orientation orientation) {
this.orientation = orientation;
}
/**
* Read from a stream.
*/
public MultiPolygonBuilder(StreamInput in) throws IOException {
orientation = Orientation.readFrom(in);
int holes = in.readVInt();
for (int i = 0; i < holes; i++) {
polygon(new PolygonBuilder(in));
}
}
@Override
public void writeTo(StreamOutput out) throws IOException {
orientation.writeTo(out);
out.writeVInt(polygons.size());
for (PolygonBuilder polygon : polygons) {
polygon.writeTo(out);
}
}
public Orientation orientation() {
return this.orientation;
}
/**
* Add a shallow copy of the polygon to the multipolygon. This will apply the orientation of the
* {@link MultiPolygonBuilder} to the polygon if polygon has different orientation.
*/
public MultiPolygonBuilder polygon(PolygonBuilder polygon) {
PolygonBuilder pb = new PolygonBuilder(new CoordinatesBuilder().coordinates(polygon.shell().coordinates(false)), this.orientation);
for (LineStringBuilder hole : polygon.holes()) {
pb.hole(hole);
}
this.polygons.add(pb);
return this;
}
/**
* get the list of polygons
*/
public List polygons() {
return polygons;
}
private static String polygonCoordinatesToWKT(PolygonBuilder polygon) {
StringBuilder sb = new StringBuilder();
sb.append(GeoWKTParser.LPAREN);
sb.append(ShapeBuilder.coordinateListToWKT(polygon.shell().coordinates));
for (LineStringBuilder hole : polygon.holes()) {
sb.append(GeoWKTParser.COMMA);
sb.append(ShapeBuilder.coordinateListToWKT(hole.coordinates));
}
sb.append(GeoWKTParser.RPAREN);
return sb.toString();
}
@Override
protected StringBuilder contentToWKT() {
final StringBuilder sb = new StringBuilder();
if (polygons.isEmpty()) {
sb.append(GeoWKTParser.EMPTY);
} else {
sb.append(GeoWKTParser.LPAREN);
if (polygons.size() > 0) {
sb.append(polygonCoordinatesToWKT(polygons.get(0)));
}
for (int i = 1; i < polygons.size(); ++i) {
sb.append(GeoWKTParser.COMMA);
sb.append(polygonCoordinatesToWKT(polygons.get(i)));
}
sb.append(GeoWKTParser.RPAREN);
}
return sb;
}
@Override
public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
builder.startObject();
builder.field(ShapeParser.FIELD_TYPE.getPreferredName(), TYPE.shapeName());
builder.field(ShapeParser.FIELD_ORIENTATION.getPreferredName(), orientation.name().toLowerCase(Locale.ROOT));
builder.startArray(ShapeParser.FIELD_COORDINATES.getPreferredName());
for(PolygonBuilder polygon : polygons) {
builder.startArray();
polygon.coordinatesArray(builder, params);
builder.endArray();
}
builder.endArray();
return builder.endObject();
}
@Override
public GeoShapeType type() {
return TYPE;
}
@Override
public Shape build() {
List shapes = new ArrayList<>(this.polygons.size());
if(wrapdateline) {
for (PolygonBuilder polygon : this.polygons) {
for(Coordinate[][] part : polygon.coordinates()) {
shapes.add(jtsGeometry(PolygonBuilder.polygon(FACTORY, part)));
}
}
} else {
for (PolygonBuilder polygon : this.polygons) {
shapes.add(jtsGeometry(polygon.toPolygon(FACTORY)));
}
}
if (shapes.size() == 1)
return shapes.get(0);
else
return new XShapeCollection<>(shapes, SPATIAL_CONTEXT);
//note: ShapeCollection is probably faster than a Multi* geom.
}
@Override
public int hashCode() {
return Objects.hash(polygons, orientation);
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null || getClass() != obj.getClass()) {
return false;
}
MultiPolygonBuilder other = (MultiPolygonBuilder) obj;
return Objects.equals(polygons, other.polygons) &&
Objects.equals(orientation, other.orientation);
}
}