/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF 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.apache.solr.search.stats;
import org.apache.lucene.search.CollectionStatistics;
/**
* Modifiable version of {@link CollectionStatistics} useful for
* aggregation of per-shard stats.
*/
public class CollectionStats {
public final String field;
public long maxDoc;
public long docCount;
public long sumTotalTermFreq;
public long sumDocFreq;
public CollectionStats(String field) {
this.field = field;
}
public CollectionStats(String field, long maxDoc, long docCount,
long sumTotalTermFreq, long sumDocFreq) {
this.field = field;
this.maxDoc = maxDoc;
this.docCount = docCount;
this.sumTotalTermFreq = sumTotalTermFreq;
this.sumDocFreq = sumDocFreq;
}
public CollectionStats(CollectionStatistics stats) {
this.field = stats.field();
this.maxDoc = stats.maxDoc();
this.docCount = stats.docCount();
this.sumTotalTermFreq = stats.sumTotalTermFreq();
this.sumDocFreq = stats.sumDocFreq();
}
/*
* If any stats being added uses -1 then reset the total stats to -1
* as that parameter becomes unknowable.
*/
public void add(CollectionStats stats) {
this.maxDoc += stats.maxDoc;
if (this.docCount < 0 || stats.docCount < 0) {
this.docCount = -1;
} else {
this.docCount += stats.docCount;
}
if (this.sumTotalTermFreq < 0 || stats.sumTotalTermFreq < 0) {
this.sumTotalTermFreq = -1;
} else {
this.sumTotalTermFreq += stats.sumTotalTermFreq;
}
if (this.sumDocFreq < 0 || stats.sumDocFreq < 0) {
this.sumDocFreq = -1;
} else {
this.sumDocFreq += stats.sumDocFreq;
}
}
public CollectionStatistics toCollectionStatistics() {
return new CollectionStatistics(field, maxDoc, docCount, sumTotalTermFreq, sumDocFreq);
}
public String toString() {
return StatsUtil.colStatsToString(this);
}
}