| // 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. |
| |
| using Apache.Arrow.Types; |
| using System; |
| using System.Collections.Generic; |
| using System.Linq; |
| |
| namespace Apache.Arrow |
| { |
| public sealed class ArrayData : IDisposable |
| { |
| private const int RecalculateNullCount = -1; |
| |
| public readonly IArrowType DataType; |
| public readonly int Length; |
| public readonly int NullCount; |
| public readonly int Offset; |
| public readonly ArrowBuffer[] Buffers; |
| public readonly ArrayData[] Children; |
| |
| public ArrayData( |
| IArrowType dataType, |
| int length, int nullCount = 0, int offset = 0, |
| IEnumerable<ArrowBuffer> buffers = null, IEnumerable<ArrayData> children = null) |
| { |
| DataType = dataType ?? NullType.Default; |
| Length = length; |
| NullCount = nullCount; |
| Offset = offset; |
| Buffers = buffers?.ToArray(); |
| Children = children?.ToArray(); |
| } |
| |
| public ArrayData( |
| IArrowType dataType, |
| int length, int nullCount = 0, int offset = 0, |
| ArrowBuffer[] buffers = null, ArrayData[] children = null) |
| { |
| DataType = dataType ?? NullType.Default; |
| Length = length; |
| NullCount = nullCount; |
| Offset = offset; |
| Buffers = buffers; |
| Children = children; |
| } |
| |
| public void Dispose() |
| { |
| if (Buffers != null) |
| { |
| foreach (ArrowBuffer buffer in Buffers) |
| { |
| buffer.Dispose(); |
| } |
| } |
| |
| if (Children != null) |
| { |
| foreach (ArrayData child in Children) |
| { |
| child?.Dispose(); |
| } |
| } |
| } |
| |
| public ArrayData Slice(int offset, int length) |
| { |
| if (offset > Length) |
| { |
| throw new ArgumentException($"Offset {offset} cannot be greater than Length {Length} for Array.Slice"); |
| } |
| |
| length = Math.Min(Length - offset, length); |
| offset += Offset; |
| |
| return new ArrayData(DataType, length, RecalculateNullCount, offset, Buffers, Children); |
| } |
| } |
| } |