ceph/src/arrow/csharp/src/Apache.Arrow/Arrays/UnionArray.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 Apache.Arrow.Types;
  17 using System;
  18
  19 namespace Apache.Arrow
  20 {
  21     public class UnionArray: Array
  22     {
  23         public UnionType Type => Data.DataType as UnionType;
  24
  25         public UnionMode Mode => Type.Mode;
  26
  27         public ArrowBuffer TypeBuffer => Data.Buffers[1];
  28
  29         public ArrowBuffer ValueOffsetBuffer => Data.Buffers[2];
  30
  31         public ReadOnlySpan<byte> TypeIds => TypeBuffer.Span;
  32
  33         public ReadOnlySpan<int> ValueOffsets => ValueOffsetBuffer.Span.CastTo<int>().Slice(0, Length + 1);
  34
  35         public UnionArray(ArrayData data)
  36             : base(data)
  37         {
  38             data.EnsureDataType(ArrowTypeId.Union);
  39             data.EnsureBufferCount(3);
  40         }
  41
  42         public IArrowArray GetChild(int index)
  43         {
  44             // TODO: Implement
  45             throw new NotImplementedException();
  46         }
  47
  48         public override void Accept(IArrowArrayVisitor visitor) => Accept(this, visitor);
  49
  50     }
  51 }