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.vector.complex.impl;
  
  import org.apache.arrow.vector.complex.NonNullableStructVector;
  import org.apache.arrow.vector.complex.StructVector;
  import org.apache.arrow.vector.complex.writer.BaseWriter.StructWriter;
  import org.apache.arrow.vector.types.pojo.Field;
  
  /**
   * An {@link org.apache.arrow.vector.complex.reader.FieldReader} for reading nullable struct
   * vectors.
   */
  public class NullableStructReaderImpl extends SingleStructReaderImpl {
  
    private StructVector nullableStructVector;
  
    public NullableStructReaderImpl(NonNullableStructVector vector) {
      super(vector);
      this.nullableStructVector = (StructVector) vector;
    }
  
    @Override
    public Field getField() {
      return nullableStructVector.getField();
    }
  
    @Override
    public void copyAsValue(StructWriter writer) {
      NullableStructWriter impl = (NullableStructWriter) writer;
      impl.container.copyFromSafe(idx(), impl.idx(), nullableStructVector);
    }
  
    @Override
    public void copyAsField(String name, StructWriter writer) {
      NullableStructWriter impl = (NullableStructWriter) writer.struct(name);
      impl.container.copyFromSafe(idx(), impl.idx(), nullableStructVector);
    }
  
    @Override
    public boolean isSet() {
      return !nullableStructVector.isNull(idx());
    }
  }
  