io.druid.query.aggregation.cardinality.types.LongCardinalityAggregatorColumnSelectorStrategy.java Source code

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Here is the source code for io.druid.query.aggregation.cardinality.types.LongCardinalityAggregatorColumnSelectorStrategy.java

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/*
 * Licensed to Metamarkets Group Inc. (Metamarkets) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. Metamarkets 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 io.druid.query.aggregation.cardinality.types;

import com.google.common.hash.Hasher;
import io.druid.hll.HyperLogLogCollector;
import io.druid.query.aggregation.cardinality.CardinalityAggregator;
import io.druid.segment.BaseLongColumnValueSelector;

public class LongCardinalityAggregatorColumnSelectorStrategy
        implements CardinalityAggregatorColumnSelectorStrategy<BaseLongColumnValueSelector> {
    @Override
    public void hashRow(BaseLongColumnValueSelector dimSelector, Hasher hasher) {
        hasher.putLong(dimSelector.getLong());
    }

    @Override
    public void hashValues(BaseLongColumnValueSelector dimSelector, HyperLogLogCollector collector) {
        collector.add(CardinalityAggregator.hashFn.hashLong(dimSelector.getLong()).asBytes());
    }
}