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 java.util.Random;
  import org.apache.arrow.memory.BufferAllocator;
  import org.apache.arrow.vector.types.Types.MinorType;
  import org.apache.arrow.vector.types.pojo.ArrowType;
  import org.apache.arrow.vector.types.pojo.FieldType;
  
  public class TestUtils {
  
    public static VarCharVector newVarCharVector(String name, BufferAllocator allocator) {
      return (VarCharVector)
          FieldType.nullable(new ArrowType.Utf8()).createNewSingleVector(name, allocator, null);
    }
  
    public static ViewVarCharVector newViewVarCharVector(String name, BufferAllocator allocator) {
      return (ViewVarCharVector)
          FieldType.nullable(new ArrowType.Utf8View()).createNewSingleVector(name, allocator, null);
    }
  
    public static VarBinaryVector newVarBinaryVector(String name, BufferAllocator allocator) {
      return (VarBinaryVector)
          FieldType.nullable(new ArrowType.Binary()).createNewSingleVector(name, allocator, null);
    }
  
    public static ViewVarBinaryVector newViewVarBinaryVector(String name, BufferAllocator allocator) {
      return (ViewVarBinaryVector)
          FieldType.nullable(new ArrowType.BinaryView()).createNewSingleVector(name, allocator, null);
    }
  
    public static <T> T newVector(
        Class<T> c, String name, ArrowType type, BufferAllocator allocator) {
      return c.cast(FieldType.nullable(type).createNewSingleVector(name, allocator, null));
    }
  
    public static <T> T newVector(
        Class<T> c, String name, MinorType type, BufferAllocator allocator) {
      return c.cast(FieldType.nullable(type.getType()).createNewSingleVector(name, allocator, null));
    }
  
    public static String generateRandomString(int length) {
      Random random = new Random();
      StringBuilder sb = new StringBuilder(length);
      for (int i = 0; i < length; i++) {
        sb.append(random.nextInt(10)); // 0-9
      }
      return sb.toString();
    }
  }
  