/*
* Licensed to ElasticSearch and Shay Banon 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.facet.datehistogram;
import gnu.trove.map.hash.TLongLongHashMap;
import org.apache.lucene.index.IndexReader;
import org.elasticsearch.common.CacheRecycler;
import org.elasticsearch.common.joda.TimeZoneRounding;
import org.elasticsearch.index.cache.field.data.FieldDataCache;
import org.elasticsearch.index.field.data.FieldDataType;
import org.elasticsearch.index.field.data.longs.LongFieldData;
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;
/**
* A date histogram facet collector that uses the same field as the key as well as the
* value.
*/
public class CountDateHistogramFacetCollector extends AbstractFacetCollector {
private final String indexFieldName;
private final DateHistogramFacet.ComparatorType comparatorType;
private final FieldDataCache fieldDataCache;
private final FieldDataType fieldDataType;
private LongFieldData fieldData;
private final DateHistogramProc histoProc;
public CountDateHistogramFacetCollector(String facetName, String fieldName, TimeZoneRounding tzRounding, DateHistogramFacet.ComparatorType comparatorType, SearchContext context) {
super(facetName);
this.comparatorType = comparatorType;
this.fieldDataCache = context.fieldDataCache();
MapperService.SmartNameFieldMappers smartMappers = context.smartFieldMappers(fieldName);
if (smartMappers == null || !smartMappers.hasMapper()) {
throw new FacetPhaseExecutionException(facetName, "No mapping found for field [" + fieldName + "]");
}
// add type filter if there is exact doc mapper associated with it
if (smartMappers.explicitTypeInNameWithDocMapper()) {
setFilter(context.filterCache().cache(smartMappers.docMapper().typeFilter()));
}
FieldMapper mapper = smartMappers.mapper();
indexFieldName = mapper.names().indexName();
fieldDataType = mapper.fieldDataType();
histoProc = new DateHistogramProc(tzRounding);
}
@Override
protected void doCollect(int doc) throws IOException {
fieldData.forEachValueInDoc(doc, histoProc);
}
@Override
protected void doSetNextReader(IndexReader reader, int docBase) throws IOException {
fieldData = (LongFieldData) fieldDataCache.cache(fieldDataType, reader, indexFieldName);
}
@Override
public Facet facet() {
return new InternalCountDateHistogramFacet(facetName, comparatorType, histoProc.counts(), true);
}
public static class DateHistogramProc implements LongFieldData.LongValueInDocProc {
private final TLongLongHashMap counts = CacheRecycler.popLongLongMap();
private final TimeZoneRounding tzRounding;
public DateHistogramProc(TimeZoneRounding tzRounding) {
this.tzRounding = tzRounding;
}
@Override
public void onValue(int docId, long value) {
counts.adjustOrPutValue(tzRounding.calc(value), 1, 1);
}
public TLongLongHashMap counts() {
return counts;
}
}
}