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;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  import java.nio.charset.StandardCharsets;
  import org.apache.arrow.memory.ArrowBuf;
  import org.apache.arrow.memory.BufferAllocator;
  import org.apache.arrow.vector.complex.ListVector;
  import org.apache.arrow.vector.complex.impl.UnionListWriter;
  import org.apache.arrow.vector.types.Types;
  import org.apache.arrow.vector.types.pojo.FieldType;
  import org.junit.jupiter.api.AfterEach;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  public class TestVarCharListVector {
  
    private BufferAllocator allocator;
  
    @BeforeEach
    public void init() {
      allocator = new DirtyRootAllocator(Long.MAX_VALUE, (byte) 100);
    }
  
    @AfterEach
    public void terminate() throws Exception {
      allocator.close();
    }
  
    @Test
    public void testVarCharListWithNulls() {
      byte[] bytes = "a".getBytes(StandardCharsets.UTF_8);
      try (ListVector vector =
              new ListVector(
                  "VarList", allocator, FieldType.nullable(Types.MinorType.VARCHAR.getType()), null);
          ArrowBuf tempBuf = allocator.buffer(bytes.length)) {
        UnionListWriter writer = vector.getWriter();
        writer.allocate();
  
        // populate input vector with the following records
        // ["a"]
        // null
        // ["b"]
        writer.setPosition(0); // optional
        writer.startList();
        tempBuf.setBytes(0, bytes);
        writer.writeVarChar(0, bytes.length, tempBuf);
        writer.endList();
  
        writer.setPosition(2);
        writer.startList();
        bytes = "b".getBytes(StandardCharsets.UTF_8);
        tempBuf.setBytes(0, bytes);
        writer.writeVarChar(0, bytes.length, tempBuf);
        writer.endList();
  
        writer.setValueCount(2);
  
        assertEquals(2, vector.getValueCount());
        assertEquals(2, vector.getDataVector().getValueCount());
      }
    }
  }
  