package org.apache.lucene.facet.search.aggregator;
/*
* 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.
*/
/**
* A CountingAggregator updates a counter array with the size of the whole
* taxonomy, counting the number of times each category appears in the given set
* of documents.
*
* @lucene.experimental
*/
public class CountingAggregator implements Aggregator {
protected int[] counterArray;
public void aggregate(int ordinal) {
++counterArray[ordinal];
}
public void setNextDoc(int docid, float score) {
// There's nothing for us to do here since we only increment the count by 1
// in this aggregator.
}
public CountingAggregator(int[] counterArray) {
this.counterArray = counterArray;
}
@Override
public boolean equals(Object obj) {
if (obj == null || obj.getClass() != this.getClass()) {
return false;
}
CountingAggregator that = (CountingAggregator) obj;
return that.counterArray == this.counterArray;
}
@Override
public int hashCode() {
int hashCode = counterArray == null ? 0 : counterArray.hashCode();
return hashCode;
}
}