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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.search.aggregations.metrics.geobounds;
import org.elasticsearch.common.geo.GeoPoint;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.search.aggregations.AggregationStreams;
import org.elasticsearch.search.aggregations.InternalAggregation;
import org.elasticsearch.search.aggregations.metrics.InternalMetricsAggregation;
import java.io.IOException;
import java.util.Map;
public class InternalGeoBounds extends InternalMetricsAggregation implements GeoBounds {
public final static Type TYPE = new Type("geo_bounds");
public final static AggregationStreams.Stream STREAM = new AggregationStreams.Stream() {
@Override
public InternalGeoBounds readResult(StreamInput in) throws IOException {
InternalGeoBounds result = new InternalGeoBounds();
result.readFrom(in);
return result;
}
};
private double top;
private double bottom;
private double posLeft;
private double posRight;
private double negLeft;
private double negRight;
private boolean wrapLongitude;
InternalGeoBounds() {
}
InternalGeoBounds(String name, double top, double bottom, double posLeft, double posRight,
double negLeft, double negRight, boolean wrapLongitude, Map<String, Object> metaData) {
super(name, metaData);
this.top = top;
this.bottom = bottom;
this.posLeft = posLeft;
this.posRight = posRight;
this.negLeft = negLeft;
this.negRight = negRight;
this.wrapLongitude = wrapLongitude;
}
@Override
public Type type() {
return TYPE;
}
@Override
public InternalAggregation reduce(ReduceContext reduceContext) {
double top = Double.NEGATIVE_INFINITY;
double bottom = Double.POSITIVE_INFINITY;
double posLeft = Double.POSITIVE_INFINITY;
double posRight = Double.NEGATIVE_INFINITY;
double negLeft = Double.POSITIVE_INFINITY;
double negRight = Double.NEGATIVE_INFINITY;
for (InternalAggregation aggregation : reduceContext.aggregations()) {
InternalGeoBounds bounds = (InternalGeoBounds) aggregation;
if (bounds.top > top) {
top = bounds.top;
}
if (bounds.bottom < bottom) {
bottom = bounds.bottom;
}
if (bounds.posLeft < posLeft) {
posLeft = bounds.posLeft;
}
if (bounds.posRight > posRight) {
posRight = bounds.posRight;
}
if (bounds.negLeft < negLeft) {
negLeft = bounds.negLeft;
}
if (bounds.negRight > negRight) {
negRight = bounds.negRight;
}
}
return new InternalGeoBounds(name, top, bottom, posLeft, posRight, negLeft, negRight, wrapLongitude, getMetaData());
}
@Override
public XContentBuilder doXContentBody(XContentBuilder builder, Params params) throws IOException {
GeoPoint topLeft = topLeft();
GeoPoint bottomRight = bottomRight();
if (topLeft != null) {
builder.startObject("bounds");
builder.startObject("top_left");
builder.field("lat", topLeft.lat());
builder.field("lon", topLeft.lon());
builder.endObject();
builder.startObject("bottom_right");
builder.field("lat", bottomRight.lat());
builder.field("lon", bottomRight.lon());
builder.endObject();
builder.endObject();
}
return builder;
}
@Override
protected void doReadFrom(StreamInput in) throws IOException {
top = in.readDouble();
bottom = in.readDouble();
posLeft = in.readDouble();
posRight = in.readDouble();
negLeft = in.readDouble();
negRight = in.readDouble();
wrapLongitude = in.readBoolean();
}
@Override
protected void doWriteTo(StreamOutput out) throws IOException {
out.writeDouble(top);
out.writeDouble(bottom);
out.writeDouble(posLeft);
out.writeDouble(posRight);
out.writeDouble(negLeft);
out.writeDouble(negRight);
out.writeBoolean(wrapLongitude);
}
public static void registerStream() {
AggregationStreams.registerStream(STREAM, TYPE.stream());
}
private static class BoundingBox {
private final GeoPoint topLeft;
private final GeoPoint bottomRight;
public BoundingBox(GeoPoint topLeft, GeoPoint bottomRight) {
this.topLeft = topLeft;
this.bottomRight = bottomRight;
}
public GeoPoint topLeft() {
return topLeft;
}
public GeoPoint bottomRight() {
return bottomRight;
}
}
private BoundingBox resolveBoundingBox() {
if (Double.isInfinite(top)) {
return null;
} else if (Double.isInfinite(posLeft)) {
return new BoundingBox(new GeoPoint(top, negLeft), new GeoPoint(bottom, negRight));
} else if (Double.isInfinite(negLeft)) {
return new BoundingBox(new GeoPoint(top, posLeft), new GeoPoint(bottom, posRight));
} else if (wrapLongitude) {
double unwrappedWidth = posRight - negLeft;
double wrappedWidth = (180 - posLeft) - (-180 - negRight);
if (unwrappedWidth <= wrappedWidth) {
return new BoundingBox(new GeoPoint(top, negLeft), new GeoPoint(bottom, posRight));
} else {
return new BoundingBox(new GeoPoint(top, posLeft), new GeoPoint(bottom, negRight));
}
} else {
return new BoundingBox(new GeoPoint(top, negLeft), new GeoPoint(bottom, posRight));
}
}
@Override
public GeoPoint topLeft() {
BoundingBox boundingBox = resolveBoundingBox();
if (boundingBox == null) {
return null;
} else {
return boundingBox.topLeft();
}
}
@Override
public GeoPoint bottomRight() {
BoundingBox boundingBox = resolveBoundingBox();
if (boundingBox == null) {
return null;
} else {
return boundingBox.bottomRight();
}
}
}