processing/src/main/java/org/apache/druid/segment/RowNumCounter.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.druid.segment;

import java.util.function.IntSupplier;

/**
 * Could be used as a simple "row number supplier" for {@link RowPointer} implementations.
 */
public final class RowNumCounter implements IntSupplier
{
  private int rowNum = 0;

  public RowNumCounter()
  {
  }

  public RowNumCounter(int initialRowNum)
  {
    this.rowNum = initialRowNum;
  }

  @Override
  public int getAsInt()
  {
    return rowNum;
  }

  public void increment()
  {
    rowNum++;
  }
}