content: /*
   * 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.arrow.adapter.avro.producers;
  
  import org.apache.arrow.vector.FieldVector;
  
  /**
   * Base class for avro producers.
   *
   * @param <T> vector type.
   */
  public abstract class BaseAvroProducer<T extends FieldVector> implements Producer<T> {
  
    protected T vector;
    protected int currentIndex;
  
    /**
     * Constructs a base avro consumer.
     *
     * @param vector the vector to consume.
     */
    protected BaseAvroProducer(T vector) {
      this.vector = vector;
    }
  
    @Override
    public void skipNull() {
      currentIndex++;
    }
  
    /**
     * Sets the current index for this producer against the underlying vector.
     *
     * <p>For a vector of length N, the valid range is [0, N] inclusive. Setting index = N signifies
     * that no further data is available for production (this is the state the produce will be in when
     * production for the current vector is complete).
     *
     * @param index New current index for the producer
     */
    @Override
    public void setPosition(int index) {
      // currentIndex == value count is a valid state, no more values will be produced
      if (index < 0 || index > vector.getValueCount()) {
        throw new IllegalArgumentException("Index out of bounds");
      }
      currentIndex = index;
    }
  
    @Override
    public void resetValueVector(T vector) {
      this.vector = vector;
      this.currentIndex = 0;
    }
  
    @Override
    public T getVector() {
      return vector;
    }
  }
  