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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.suggest.completion.context;
import org.elasticsearch.ElasticsearchParseException;
import org.elasticsearch.common.ParseField;
import org.elasticsearch.common.geo.GeoPoint;
import org.elasticsearch.common.geo.GeoUtils;
import org.elasticsearch.common.xcontent.ObjectParser;
import org.elasticsearch.common.xcontent.ToXContent;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentParser;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import static org.elasticsearch.search.suggest.completion.context.GeoContextMapping.*;
/**
* Defines the query context for {@link GeoContextMapping}
*/
public final class GeoQueryContext implements ToXContent {
public GeoPoint geoPoint;
public int boost = 1;
public int precision = -1;
public List<Integer> neighbours = new ArrayList<>(0);
/**
* Creates a query context for a given geo point with a boost of 1
* and a precision of {@value GeoContextMapping#DEFAULT_PRECISION}
*/
public GeoQueryContext(GeoPoint geoPoint) {
this(geoPoint.geohash());
}
/**
* Creates a query context for a given geo point with a
* provided boost
*/
public GeoQueryContext(GeoPoint geoPoint, int boost) {
this(geoPoint.geohash(), boost);
}
/**
* Creates a query context with a given geo hash with a boost of 1
* and a precision of {@value GeoContextMapping#DEFAULT_PRECISION}
*/
public GeoQueryContext(CharSequence geoHash) {
this(geoHash, 1);
}
/**
* Creates a query context for a given geo hash with a
* provided boost
*/
public GeoQueryContext(CharSequence geoHash, int boost) {
this(geoHash, boost, -1);
}
/**
* Creates a query context for a geo point with
* a provided boost and enables generating neighbours
* at specified precisions
*/
public GeoQueryContext(CharSequence geoHash, int boost, int precision, Integer... neighbours) {
this(GeoPoint.fromGeohash(geoHash.toString()), boost, precision, neighbours);
}
/**
* Creates a query context for a geo hash with
* a provided boost and enables generating neighbours
* at specified precisions
*/
public GeoQueryContext(GeoPoint geoPoint, int boost, int precision, Integer... neighbours) {
this.geoPoint = geoPoint;
this.boost = boost;
this.precision = precision;
Collections.addAll(this.neighbours, neighbours);
}
private GeoQueryContext() {
}
void setBoost(int boost) {
this.boost = boost;
}
void setPrecision(int precision) {
this.precision = precision;
}
void setNeighbours(List<Integer> neighbours) {
this.neighbours = neighbours;
}
void setGeoPoint(GeoPoint geoPoint) {
this.geoPoint = geoPoint;
}
private double lat = Double.NaN;
void setLat(double lat) {
this.lat = lat;
}
private double lon = Double.NaN;
void setLon(double lon) {
this.lon = lon;
}
void finish() {
if (geoPoint == null) {
if (Double.isNaN(lat) == false && Double.isNaN(lon) == false) {
geoPoint = new GeoPoint(lat, lon);
} else {
throw new ElasticsearchParseException("no geohash or geo point provided");
}
}
}
private static ObjectParser<GeoQueryContext, GeoContextMapping> GEO_CONTEXT_PARSER = new ObjectParser<>("geo", null);
static {
GEO_CONTEXT_PARSER.declareField((parser, geoQueryContext, geoContextMapping) -> geoQueryContext.setGeoPoint(GeoUtils.parseGeoPoint(parser)), new ParseField("context"), ObjectParser.ValueType.OBJECT);
GEO_CONTEXT_PARSER.declareInt(GeoQueryContext::setBoost, new ParseField("boost"));
// TODO : add string support for precision for GeoUtils.geoHashLevelsForPrecision()
GEO_CONTEXT_PARSER.declareInt(GeoQueryContext::setPrecision, new ParseField("precision"));
// TODO : add string array support for precision for GeoUtils.geoHashLevelsForPrecision()
GEO_CONTEXT_PARSER.declareIntArray(GeoQueryContext::setNeighbours, new ParseField("neighbours"));
GEO_CONTEXT_PARSER.declareDouble(GeoQueryContext::setLat, new ParseField("lat"));
GEO_CONTEXT_PARSER.declareDouble(GeoQueryContext::setLon, new ParseField("lon"));
}
public static GeoQueryContext parse(XContentParser parser) throws IOException {
XContentParser.Token token = parser.currentToken();
GeoQueryContext queryContext = new GeoQueryContext();
if (token == XContentParser.Token.START_OBJECT) {
GEO_CONTEXT_PARSER.parse(parser, queryContext);
} else if (token == XContentParser.Token.VALUE_STRING) {
queryContext.setGeoPoint(GeoPoint.fromGeohash(parser.text()));
} else {
throw new ElasticsearchParseException("geo context must be an object or string");
}
queryContext.finish();
return queryContext;
}
@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;
}
}
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