src/main/java/org/apache/datasketches/hive/hll/State.java

/*
 * 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.datasketches.hive.hll;

import org.apache.datasketches.hll.HllSketch;
import org.apache.datasketches.hll.TgtHllType;
import org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator.AbstractAggregationBuffer;
import org.apache.hadoop.hive.serde2.objectinspector.PrimitiveObjectInspector;

abstract class State extends AbstractAggregationBuffer {

  private int lgK_;
  private TgtHllType type_;

  void init(final int lgK, final TgtHllType type) {
    this.lgK_ = lgK;
    this.type_ = type;
  }

  int getLgK() {
    return this.lgK_;
  }

  TgtHllType getType() {
    return this.type_;
  }

  abstract boolean isInitialized();

  abstract void update(final Object data, final PrimitiveObjectInspector keyObjectInspector);

  abstract HllSketch getResult();

  abstract void reset();

}