HllInstance.java

/*
 * Licensed 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.airlift.stats.cardinality;

import com.google.common.annotations.VisibleForTesting;
import io.airlift.slice.Slice;

interface HllInstance
{
    void insertHash(long hash);

    long cardinality();

    int getIndexBitLength();

    int estimatedInMemorySize();

    int estimatedSerializedSize();

    Slice serialize();

    DenseHll toDense();

    @VisibleForTesting
    void verify();
}