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/*
* 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 com.spatial4j.core.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;
public static final MultiPolygonBuilder PROTOTYPE = new MultiPolygonBuilder();
private final ArrayList<PolygonBuilder> polygons = new ArrayList<>();
private Orientation orientation = Orientation.RIGHT;
public MultiPolygonBuilder() {
this(Orientation.RIGHT);
}
public MultiPolygonBuilder(Orientation orientation) {
this.orientation = orientation;
}
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(this.orientation);
pb.points(polygon.shell().coordinates(false));
for (LineStringBuilder hole : polygon.holes()) {
pb.hole(hole);
}
this.polygons.add(pb);
return this;
}
/**
* get the list of polygons
*/
public ArrayList<PolygonBuilder> polygons() {
return polygons;
}
@Override
public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
builder.startObject();
builder.field(FIELD_TYPE, TYPE.shapeName());
builder.field(FIELD_ORIENTATION, orientation.name().toLowerCase(Locale.ROOT));
builder.startArray(FIELD_COORDINATES);
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<Shape> 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);
}
@Override
public void writeTo(StreamOutput out) throws IOException {
orientation.writeTo(out);
out.writeVInt(polygons.size());
for (PolygonBuilder polygon : polygons) {
polygon.writeTo(out);
}
}
@Override
public MultiPolygonBuilder readFrom(StreamInput in) throws IOException {
MultiPolygonBuilder polyBuilder = new MultiPolygonBuilder(Orientation.readFrom(in));
int holes = in.readVInt();
for (int i = 0; i < holes; i++) {
polyBuilder.polygon(PolygonBuilder.PROTOTYPE.readFrom(in));
}
return polyBuilder;
}
}
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