/*
* 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.geode.cache.query.internal.aggregate;
import java.util.Set;
/**
* Computes the count of the distinct rows on the PR query node.
*
*
*/
public class CountDistinctPRQueryNode extends DistinctAggregator {
/**
* The input data is the Set containing distinct values from each of the bucket nodes.
*/
@Override
public void accumulate(Object value) {
this.distinct.addAll((Set) value);
}
@Override
public Object terminate() {
return Integer.valueOf(this.distinct.size());
}
}