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.consumers;
  
  import java.io.IOException;
  import org.apache.arrow.vector.complex.ListVector;
  import org.apache.avro.io.Decoder;
  
  /**
   * Consumer which consume array type values from avro decoder. Write the data to {@link ListVector}.
   */
  public class AvroArraysConsumer extends BaseAvroConsumer<ListVector> {
  
    private final Consumer delegate;
  
    /** Instantiate a ArrayConsumer. */
    public AvroArraysConsumer(ListVector vector, Consumer delegate) {
      super(vector);
      this.delegate = delegate;
    }
  
    @Override
    public void consume(Decoder decoder) throws IOException {
  
      vector.startNewValue(currentIndex);
      long totalCount = 0;
      for (long count = decoder.readArrayStart(); count != 0; count = decoder.arrayNext()) {
        totalCount += count;
        ensureInnerVectorCapacity(totalCount);
        for (int element = 0; element < count; element++) {
          delegate.consume(decoder);
        }
      }
      vector.endValue(currentIndex, (int) totalCount);
      currentIndex++;
    }
  
    @Override
    public void close() throws Exception {
      super.close();
      delegate.close();
    }
  
    @Override
    public boolean resetValueVector(ListVector vector) {
      this.delegate.resetValueVector(vector.getDataVector());
      return super.resetValueVector(vector);
    }
  
    void ensureInnerVectorCapacity(long targetCapacity) {
      while (vector.getDataVector().getValueCapacity() < targetCapacity) {
        vector.getDataVector().reAlloc();
      }
    }
  }
  