/*
* Licensed to Elastic Search and Shay Banon under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Elastic Search 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.facet.geodistance;
import org.elasticsearch.common.collect.Lists;
import org.elasticsearch.common.component.AbstractComponent;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.unit.DistanceUnit;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.index.mapper.geo.GeoPointFieldMapper;
import org.elasticsearch.index.search.geo.GeoDistance;
import org.elasticsearch.index.search.geo.GeoHashUtils;
import org.elasticsearch.search.facet.Facet;
import org.elasticsearch.search.facet.FacetCollector;
import org.elasticsearch.search.facet.FacetPhaseExecutionException;
import org.elasticsearch.search.facet.FacetProcessor;
import org.elasticsearch.search.internal.SearchContext;
import java.io.IOException;
import java.util.List;
import java.util.Map;
/**
* @author kimchy (shay.banon)
*/
public class GeoDistanceFacetProcessor extends AbstractComponent implements FacetProcessor {
@Inject public GeoDistanceFacetProcessor(Settings settings) {
super(settings);
InternalGeoDistanceFacet.registerStreams();
}
@Override public String[] types() {
return new String[]{GeoDistanceFacet.TYPE, "geoDistance"};
}
@Override public FacetCollector parse(String facetName, XContentParser parser, SearchContext context) throws IOException {
String fieldName = null;
String valueFieldName = null;
String valueScript = null;
String scriptLang = null;
Map<String, Object> params = null;
double lat = Double.NaN;
double lon = Double.NaN;
DistanceUnit unit = DistanceUnit.KILOMETERS;
GeoDistance geoDistance = GeoDistance.ARC;
List<GeoDistanceFacet.Entry> entries = Lists.newArrayList();
XContentParser.Token token;
String currentName = parser.currentName();
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentName = parser.currentName();
} else if (token == XContentParser.Token.START_ARRAY) {
if ("ranges".equals(currentName) || "entries".equals(currentName)) {
// "ranges" : [
// { "from" : 0, "to" : 12.5 }
// { "from" : 12.5 }
// ]
while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
double from = Double.NEGATIVE_INFINITY;
double to = Double.POSITIVE_INFINITY;
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentName = parser.currentName();
} else if (token.isValue()) {
if ("from".equals(currentName)) {
from = parser.doubleValue();
} else if ("to".equals(currentName)) {
to = parser.doubleValue();
}
}
}
entries.add(new GeoDistanceFacet.Entry(from, to, 0, 0, 0, Double.POSITIVE_INFINITY, Double.NEGATIVE_INFINITY));
}
} else {
token = parser.nextToken();
lon = parser.doubleValue();
token = parser.nextToken();
lat = parser.doubleValue();
while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
}
fieldName = currentName;
}
} else if (token == XContentParser.Token.START_OBJECT) {
if ("params".equals(currentName)) {
params = parser.map();
} else {
// the json in the format of -> field : { lat : 30, lon : 12 }
fieldName = currentName;
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentName = parser.currentName();
} else if (token.isValue()) {
if (currentName.equals(GeoPointFieldMapper.Names.LAT)) {
lat = parser.doubleValue();
} else if (currentName.equals(GeoPointFieldMapper.Names.LON)) {
lon = parser.doubleValue();
} else if (currentName.equals(GeoPointFieldMapper.Names.GEOHASH)) {
double[] values = GeoHashUtils.decode(parser.text());
lat = values[0];
lon = values[1];
}
}
}
}
} else if (token.isValue()) {
if (currentName.equals("unit")) {
unit = DistanceUnit.fromString(parser.text());
} else if (currentName.equals("distance_type") || currentName.equals("distanceType")) {
geoDistance = GeoDistance.fromString(parser.text());
} else if ("value_field".equals(currentName) || "valueField".equals(currentName)) {
valueFieldName = parser.text();
} else if ("value_script".equals(currentName) || "valueScript".equals(currentName)) {
valueScript = parser.text();
} else if ("lang".equals(currentName)) {
scriptLang = parser.text();
} else {
// assume the value is the actual value
String value = parser.text();
int comma = value.indexOf(',');
if (comma != -1) {
lat = Double.parseDouble(value.substring(0, comma).trim());
lon = Double.parseDouble(value.substring(comma + 1).trim());
} else {
double[] values = GeoHashUtils.decode(value);
lat = values[0];
lon = values[1];
}
fieldName = currentName;
}
}
}
if (Double.isNaN(lat) || Double.isNaN(lon)) {
throw new FacetPhaseExecutionException(facetName, "lat/lon not set for geo_distance facet");
}
if (entries.isEmpty()) {
throw new FacetPhaseExecutionException(facetName, "no ranges defined for geo_distance facet");
}
if (valueFieldName != null) {
return new ValueGeoDistanceFacetCollector(facetName, fieldName, lat, lon, unit, geoDistance, entries.toArray(new GeoDistanceFacet.Entry[entries.size()]),
context, valueFieldName);
}
if (valueScript != null) {
return new ScriptGeoDistanceFacetCollector(facetName, fieldName, lat, lon, unit, geoDistance, entries.toArray(new GeoDistanceFacet.Entry[entries.size()]),
context, scriptLang, valueScript, params);
}
return new GeoDistanceFacetCollector(facetName, fieldName, lat, lon, unit, geoDistance, entries.toArray(new GeoDistanceFacet.Entry[entries.size()]),
context);
}
@Override public Facet reduce(String name, List<Facet> facets) {
InternalGeoDistanceFacet agg = null;
for (Facet facet : facets) {
InternalGeoDistanceFacet geoDistanceFacet = (InternalGeoDistanceFacet) facet;
if (agg == null) {
agg = geoDistanceFacet;
} else {
for (int i = 0; i < geoDistanceFacet.entries.length; i++) {
GeoDistanceFacet.Entry aggEntry = agg.entries[i];
GeoDistanceFacet.Entry currentEntry = geoDistanceFacet.entries[i];
aggEntry.count += currentEntry.count;
aggEntry.totalCount += currentEntry.totalCount;
aggEntry.total += currentEntry.total;
if (currentEntry.min < aggEntry.min) {
aggEntry.min = currentEntry.min;
}
if (currentEntry.max > aggEntry.max) {
aggEntry.max = currentEntry.max;
}
}
}
}
return agg;
}
}