/*
* 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.datehistogram;
import org.apache.lucene.index.IndexReader;
import org.elasticsearch.common.CacheRecycler;
import org.elasticsearch.common.joda.time.MutableDateTime;
import org.elasticsearch.common.trove.map.hash.TLongLongHashMap;
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.
*
* @author kimchy (shay.banon)
*/
public class CountDateHistogramFacetCollector extends AbstractFacetCollector {
private final String indexFieldName;
private final MutableDateTime dateTime;
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, MutableDateTime dateTime, long interval, DateHistogramFacet.ComparatorType comparatorType, SearchContext context) {
super(facetName);
this.dateTime = dateTime;
this.comparatorType = comparatorType;
this.fieldDataCache = context.fieldDataCache();
MapperService.SmartNameFieldMappers smartMappers = context.mapperService().smartName(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.hasDocMapper()) {
setFilter(context.filterCache().cache(smartMappers.docMapper().typeFilter()));
}
FieldMapper mapper = smartMappers.mapper();
indexFieldName = mapper.names().indexName();
fieldDataType = mapper.fieldDataType();
if (interval == 1) {
histoProc = new DateHistogramProc();
} else {
histoProc = new IntervalDateHistogramProc(interval);
}
}
@Override protected void doCollect(int doc) throws IOException {
fieldData.forEachValueInDoc(doc, dateTime, 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 long bucket(long value, long interval) {
return ((value / interval) * interval);
}
public static class DateHistogramProc implements LongFieldData.DateValueInDocProc {
protected final TLongLongHashMap counts = CacheRecycler.popLongLongMap();
@Override public void onValue(int docId, MutableDateTime dateTime) {
counts.adjustOrPutValue(dateTime.getMillis(), 1, 1);
}
public TLongLongHashMap counts() {
return counts;
}
}
public static class IntervalDateHistogramProc extends DateHistogramProc {
private final long interval;
public IntervalDateHistogramProc(long interval) {
this.interval = interval;
}
@Override public void onValue(int docId, MutableDateTime dateTime) {
long bucket = bucket(dateTime.getMillis(), interval);
counts.adjustOrPutValue(bucket, 1, 1);
}
}
}