ceph/src/arrow/csharp/src/Apache.Arrow/Types/NestedType.cs

   1 // Licensed to the Apache Software Foundation (ASF) under one or more
   2 // contributor license agreements. See the NOTICE file distributed with
   3 // this work for additional information regarding copyright ownership.
   4 // The ASF licenses this file to You under the Apache License, Version 2.0
   5 // (the "License"); you may not use this file except in compliance with
   6 // the License.  You may obtain a copy of the License at
   7 //
   8 //     http://www.apache.org/licenses/LICENSE-2.0
   9 //
  10 // Unless required by applicable law or agreed to in writing, software
  11 // distributed under the License is distributed on an "AS IS" BASIS,
  12 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13 // See the License for the specific language governing permissions and
  14 // limitations under the License.
  15
  16 using System;
  17 using System.Collections.Generic;
  18
  19 namespace Apache.Arrow.Types
  20 {
  21     public abstract class NestedType : ArrowType
  22     {
  23         [Obsolete("Use `Fields` instead")]
  24         public IReadOnlyList<Field> Children => Fields;
  25
  26         public IReadOnlyList<Field> Fields { get; }
  27
  28         protected NestedType(IReadOnlyList<Field> fields)
  29         {
  30             if (fields == null || fields.Count == 0)
  31             {
  32                 throw new ArgumentNullException(nameof(fields));
  33             }
  34             Fields = fields;
  35         }
  36
  37         protected NestedType(Field field)
  38         {
  39             if (field == null)
  40             {
  41                 throw new ArgumentNullException(nameof(field));
  42             }
  43             Fields = new Field[] { field };
  44         }
  45     }
  46 }