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// 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 System;
using System.Runtime.CompilerServices;
namespace Apache.Arrow
{
public abstract class Array : IArrowArray
{
public ArrayData Data { get; }
protected Array(ArrayData data)
{
Data = data ?? throw new ArgumentNullException(nameof(data));
}
public int Length => Data.Length;
public int Offset => Data.Offset;
public int NullCount => Data.NullCount;
public ArrowBuffer NullBitmapBuffer => Data.Buffers[0];
public virtual void Accept(IArrowArrayVisitor visitor)
{
Accept(this, visitor);
}
public bool IsValid(int index) =>
NullCount == 0 || NullBitmapBuffer.IsEmpty || BitUtility.GetBit(NullBitmapBuffer.Span, index + Offset);
public bool IsNull(int index) => !IsValid(index);
[MethodImpl(MethodImplOptions.AggressiveInlining)]
internal static void Accept<T>(T array, IArrowArrayVisitor visitor)
where T : class, IArrowArray
{
switch (visitor)
{
case IArrowArrayVisitor<T> typedVisitor:
typedVisitor.Visit(array);
break;
default:
visitor.Visit(array);
break;
}
}
public Array 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(Data.Length - offset, length);
offset += Data.Offset;
ArrayData newData = Data.Slice(offset, length);
return ArrowArrayFactory.BuildArray(newData) as Array;
}
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
protected virtual void Dispose(bool disposing)
{
if (disposing)
{
Data.Dispose();
}
}
}
}
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