/*
 * 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.paimon.statistics;

import org.apache.paimon.data.serializer.Serializer;
import org.apache.paimon.format.SimpleColStats;

/** The counts stats collector, which will only report null count stats. */
public class CountsSimpleColStatsCollector extends AbstractSimpleColStatsCollector {

    @Override
    public void collect(Object field, Serializer<Object> serializer) {
        if (field == null) {
            nullCount++;
        }
    }

    @Override
    public SimpleColStats convert(SimpleColStats source) {
        return new SimpleColStats(null, null, source.nullCount());
    }
}
