org.elasticsearch.search.suggest.completion.context.GeoQueryContext 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
/*
* 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.suggest.completion.context;
import org.elasticsearch.ElasticsearchParseException;
import org.elasticsearch.common.geo.GeoPoint;
import org.elasticsearch.common.geo.GeoUtils;
import org.elasticsearch.xcontent.ObjectParser;
import org.elasticsearch.xcontent.ParseField;
import org.elasticsearch.xcontent.ToXContentObject;
import org.elasticsearch.xcontent.XContentBuilder;
import org.elasticsearch.xcontent.XContentParser;
import java.io.IOException;
import java.util.Collections;
import java.util.List;
import java.util.Objects;
import static org.elasticsearch.common.geo.GeoUtils.parsePrecision;
import static org.elasticsearch.search.suggest.completion.context.GeoContextMapping.CONTEXT_BOOST;
import static org.elasticsearch.search.suggest.completion.context.GeoContextMapping.CONTEXT_NEIGHBOURS;
import static org.elasticsearch.search.suggest.completion.context.GeoContextMapping.CONTEXT_PRECISION;
import static org.elasticsearch.search.suggest.completion.context.GeoContextMapping.CONTEXT_VALUE;
/**
* Defines the query context for {@link GeoContextMapping}
*/
public final class GeoQueryContext implements ToXContentObject {
public static final String NAME = "geo";
private final GeoPoint geoPoint;
private final int boost;
private final int precision;
private final List neighbours;
private GeoQueryContext(GeoPoint geoPoint, int boost, int precision, List neighbours) {
this.geoPoint = geoPoint;
this.boost = boost;
this.precision = precision;
this.neighbours = neighbours;
}
/**
* Returns the geo point of the context
*/
public GeoPoint getGeoPoint() {
return geoPoint;
}
/**
* Returns the query-time boost of the context
*/
public int getBoost() {
return boost;
}
/**
* Returns the precision (length) for the geohash
*/
public int getPrecision() {
return precision;
}
/**
* Returns the precision levels at which geohash cells neighbours are considered
*/
public List getNeighbours() {
return neighbours;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
GeoQueryContext that = (GeoQueryContext) o;
return Objects.equals(boost, that.boost)
&& Objects.equals(precision, that.precision)
&& Objects.equals(geoPoint, that.geoPoint)
&& Objects.equals(neighbours, that.neighbours);
}
@Override
public int hashCode() {
int result = geoPoint != null ? geoPoint.hashCode() : 0;
result = 31 * result + boost;
result = 31 * result + precision;
result = 31 * result + (neighbours != null ? neighbours.hashCode() : 0);
return result;
}
public static Builder builder() {
return new Builder();
}
private static final ObjectParser GEO_CONTEXT_PARSER = new ObjectParser<>(NAME);
static {
GEO_CONTEXT_PARSER.declareField(
(parser, geoQueryContext, geoContextMapping) -> geoQueryContext.setGeoPoint(GeoUtils.parseGeoPoint(parser)),
new ParseField(CONTEXT_VALUE),
ObjectParser.ValueType.OBJECT
);
GEO_CONTEXT_PARSER.declareInt(GeoQueryContext.Builder::setBoost, new ParseField(CONTEXT_BOOST));
GEO_CONTEXT_PARSER.declareField(
(parser, builder, context) -> builder.setPrecision(parsePrecision(parser)),
new ParseField(CONTEXT_PRECISION),
ObjectParser.ValueType.INT
);
GEO_CONTEXT_PARSER.declareFieldArray(
GeoQueryContext.Builder::setNeighbours,
(parser, builder) -> parsePrecision(parser),
new ParseField(CONTEXT_NEIGHBOURS),
ObjectParser.ValueType.INT_ARRAY
);
GEO_CONTEXT_PARSER.declareDouble(GeoQueryContext.Builder::setLat, new ParseField("lat"));
GEO_CONTEXT_PARSER.declareDouble(GeoQueryContext.Builder::setLon, new ParseField("lon"));
}
public static GeoQueryContext fromXContent(XContentParser parser) throws IOException {
XContentParser.Token token = parser.currentToken();
GeoQueryContext.Builder builder = new Builder();
if (token == XContentParser.Token.START_OBJECT) {
GEO_CONTEXT_PARSER.parse(parser, builder, null);
} else if (token == XContentParser.Token.VALUE_STRING) {
builder.setGeoPoint(GeoPoint.fromGeohash(parser.text()));
} else {
throw new ElasticsearchParseException("geo context must be an object or string");
}
return builder.build();
}
@Override
public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
builder.startObject();
builder.startObject(CONTEXT_VALUE);
builder.field("lat", geoPoint.getLat());
builder.field("lon", geoPoint.getLon());
builder.endObject();
builder.field(CONTEXT_BOOST, boost);
builder.field(CONTEXT_NEIGHBOURS, neighbours);
builder.field(CONTEXT_PRECISION, precision);
builder.endObject();
return builder;
}
public static class Builder {
private GeoPoint geoPoint;
private int boost = 1;
private int precision = 12;
private List neighbours = Collections.emptyList();
public Builder() {}
/**
* Sets the query-time boost for the context
* Defaults to 1
*/
public Builder setBoost(int boost) {
if (boost <= 0) {
throw new IllegalArgumentException("boost must be greater than 0");
}
this.boost = boost;
return this;
}
/**
* Sets the precision level for computing the geohash from the context geo point.
* Defaults to using index-time precision level
*/
public Builder setPrecision(int precision) {
if (precision < 1 || precision > 12) {
throw new IllegalArgumentException("precision must be between 1 and 12");
}
this.precision = precision;
return this;
}
/**
* Sets the precision levels at which geohash cells neighbours are considered.
* Defaults to only considering neighbours at the index-time precision level
*/
public Builder setNeighbours(List neighbours) {
for (int neighbour : neighbours) {
if (neighbour < 1 || neighbour > 12) {
throw new IllegalArgumentException("neighbour value must be between 1 and 12");
}
}
this.neighbours = neighbours;
return this;
}
/**
* Sets the geo point of the context.
* This is a required field
*/
public Builder setGeoPoint(GeoPoint geoPoint) {
Objects.requireNonNull(geoPoint, "geoPoint must not be null");
this.geoPoint = geoPoint;
return this;
}
private double lat = Double.NaN;
void setLat(double lat) {
this.lat = lat;
}
private double lon = Double.NaN;
void setLon(double lon) {
this.lon = lon;
}
public GeoQueryContext build() {
if (geoPoint == null) {
if (Double.isNaN(lat) == false && Double.isNaN(lon) == false) {
geoPoint = new GeoPoint(lat, lon);
}
}
Objects.requireNonNull(geoPoint, "geoPoint must not be null");
return new GeoQueryContext(geoPoint, boost, precision, neighbours);
}
}
}