org.elasticsearch.search.facet.datehistogram.CountDateHistogramFacetExecutor Maven / Gradle / Ivy
/*
* 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.iterator.TLongLongIterator;
import gnu.trove.map.hash.TLongLongHashMap;
import org.apache.lucene.index.AtomicReaderContext;
import org.elasticsearch.cache.recycler.CacheRecycler;
import org.elasticsearch.common.joda.TimeZoneRounding;
import org.elasticsearch.common.recycler.Recycler;
import org.elasticsearch.index.fielddata.IndexNumericFieldData;
import org.elasticsearch.index.fielddata.LongValues;
import org.elasticsearch.search.facet.FacetExecutor;
import org.elasticsearch.search.facet.InternalFacet;
import org.elasticsearch.search.facet.LongFacetAggregatorBase;
import java.io.IOException;
/**
* A date histogram facet collector that uses the same field as the key as well as the
* value.
*/
public class CountDateHistogramFacetExecutor extends FacetExecutor {
private final TimeZoneRounding tzRounding;
private final IndexNumericFieldData indexFieldData;
final DateHistogramFacet.ComparatorType comparatorType;
final Recycler.V counts;
public CountDateHistogramFacetExecutor(IndexNumericFieldData indexFieldData, TimeZoneRounding tzRounding, DateHistogramFacet.ComparatorType comparatorType, CacheRecycler cacheRecycler) {
this.comparatorType = comparatorType;
this.indexFieldData = indexFieldData;
this.tzRounding = tzRounding;
this.counts = cacheRecycler.longLongMap(-1);
}
@Override
public Collector collector() {
return new Collector();
}
@Override
public InternalFacet buildFacet(String facetName) {
InternalCountDateHistogramFacet.CountEntry[] entries = new InternalCountDateHistogramFacet.CountEntry[counts.v().size()];
int i = 0;
for (TLongLongIterator it = counts.v().iterator(); it.hasNext(); ) {
it.advance();
entries[i++] = new InternalCountDateHistogramFacet.CountEntry(it.key(), it.value());
}
counts.release();
return new InternalCountDateHistogramFacet(facetName, comparatorType, entries);
}
class Collector extends FacetExecutor.Collector {
private LongValues values;
private final DateHistogramProc histoProc;
public Collector() {
this.histoProc = new DateHistogramProc(counts.v(), tzRounding);
}
@Override
public void setNextReader(AtomicReaderContext context) throws IOException {
values = indexFieldData.load(context).getLongValues();
}
@Override
public void collect(int doc) throws IOException {
histoProc.onDoc(doc, values);
}
@Override
public void postCollection() {
}
}
public static class DateHistogramProc extends LongFacetAggregatorBase {
private final TLongLongHashMap counts;
private final TimeZoneRounding tzRounding;
public DateHistogramProc(TLongLongHashMap counts, TimeZoneRounding tzRounding) {
this.counts = counts;
this.tzRounding = tzRounding;
}
@Override
public void onValue(int docId, long value) {
counts.adjustOrPutValue(tzRounding.calc(value), 1, 1);
}
public TLongLongHashMap counts() {
return counts;
}
}
}