/*
* 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.range;
import org.apache.lucene.index.IndexReader;
import org.elasticsearch.index.cache.field.data.FieldDataCache;
import org.elasticsearch.index.field.data.FieldDataType;
import org.elasticsearch.index.field.data.NumericFieldData;
import org.elasticsearch.index.mapper.FieldMapper;
import org.elasticsearch.index.mapper.MapperService;
import org.elasticsearch.search.facet.AbstractFacetCollector;
import org.elasticsearch.search.facet.Facet;
import org.elasticsearch.search.facet.FacetPhaseExecutionException;
import org.elasticsearch.search.internal.SearchContext;
import java.io.IOException;
/**
* @author kimchy (shay.banon)
*/
public class KeyValueRangeFacetCollector extends AbstractFacetCollector {
private final String keyIndexFieldName;
private final String valueIndexFieldName;
private final FieldDataCache fieldDataCache;
private final FieldDataType keyFieldDataType;
private NumericFieldData keyFieldData;
private final FieldDataType valueFieldDataType;
private final RangeFacet.Entry[] entries;
private final RangeProc rangeProc;
public KeyValueRangeFacetCollector(String facetName, String keyFieldName, String valueFieldName, RangeFacet.Entry[] entries, SearchContext context) {
super(facetName);
this.entries = entries;
this.fieldDataCache = context.fieldDataCache();
MapperService.SmartNameFieldMappers smartMappers = context.mapperService().smartName(keyFieldName);
if (smartMappers == null || !smartMappers.hasMapper()) {
throw new FacetPhaseExecutionException(facetName, "No mapping found for field [" + keyFieldName + "]");
}
// add type filter if there is exact doc mapper associated with it
if (smartMappers.hasDocMapper()) {
setFilter(context.filterCache().cache(smartMappers.docMapper().typeFilter()));
}
keyIndexFieldName = smartMappers.mapper().names().indexName();
keyFieldDataType = smartMappers.mapper().fieldDataType();
FieldMapper mapper = context.mapperService().smartNameFieldMapper(valueFieldName);
if (mapper == null) {
throw new FacetPhaseExecutionException(facetName, "No mapping found for value_field [" + valueFieldName + "]");
}
valueIndexFieldName = mapper.names().indexName();
valueFieldDataType = mapper.fieldDataType();
this.rangeProc = new RangeProc(entries);
}
@Override protected void doSetNextReader(IndexReader reader, int docBase) throws IOException {
keyFieldData = (NumericFieldData) fieldDataCache.cache(keyFieldDataType, reader, keyIndexFieldName);
rangeProc.valueFieldData = (NumericFieldData) fieldDataCache.cache(valueFieldDataType, reader, valueIndexFieldName);
}
@Override protected void doCollect(int doc) throws IOException {
for (RangeFacet.Entry entry : entries) {
entry.foundInDoc = false;
}
keyFieldData.forEachValueInDoc(doc, rangeProc);
}
@Override public Facet facet() {
return new InternalRangeFacet(facetName, entries);
}
public static class RangeProc implements NumericFieldData.DoubleValueInDocProc {
private final RangeFacet.Entry[] entries;
NumericFieldData valueFieldData;
public RangeProc(RangeFacet.Entry[] entries) {
this.entries = entries;
}
@Override public void onValue(int docId, double value) {
for (RangeFacet.Entry entry : entries) {
if (entry.foundInDoc) {
continue;
}
if (value >= entry.getFrom() && value < entry.getTo()) {
entry.foundInDoc = true;
entry.count++;
if (valueFieldData.multiValued()) {
double[] valuesValues = valueFieldData.doubleValues(docId);
entry.totalCount += valuesValues.length;
for (double valueValue : valuesValues) {
entry.total += valueValue;
if (valueValue < entry.min) {
entry.min = valueValue;
}
if (valueValue > entry.max) {
entry.max = valueValue;
}
}
} else {
double valueValue = valueFieldData.doubleValue(docId);
entry.totalCount++;
entry.total += valueValue;
if (valueValue < entry.min) {
entry.min = valueValue;
}
if (valueValue > entry.max) {
entry.max = valueValue;
}
}
}
}
}
}
}