/// <summary>
/// Start a new variable-length list slot
///
/// This function should be called before beginning to append elements to the
/// value builder
/// </summary>
/// <returns></returns>
public Builder Append()
{
ValueOffsetsBufferBuilder.Append(ValueBuilder.Length);
ValidityBufferBuilder.Append(true);
return(this);
}
public Builder Clear()
{
ValueOffsetsBufferBuilder.Clear();
ValueBuilder.Clear();
ValidityBufferBuilder.Clear();
return(this);
}
public Builder AppendNull()
{
ValueOffsetsBufferBuilder.Append(ValueBuilder.Length);
ValidityBufferBuilder.Append(false);
NullCount++;
return(this);
}
public ListArray Build(MemoryAllocator allocator = default)
{
Append();
return(new ListArray(DataType, Length - 1,
ValueOffsetsBufferBuilder.Build(allocator), ValueBuilder.Build(allocator),
new ArrowBuffer(), 0, 0));
}
public ListArray Build(MemoryAllocator allocator = default)
{
Append();
var validityBuffer = NullCount > 0
? ValidityBufferBuilder.Build(allocator).ValueBuffer
: ArrowBuffer.Empty;
return(new ListArray(DataType, Length - 1,
ValueOffsetsBufferBuilder.Build(allocator), ValueBuilder.Build(allocator),
validityBuffer, NullCount, 0));
}
public Builder Resize(int length)
{
ValueOffsetsBufferBuilder.Resize(length + 1);
ValidityBufferBuilder.Resize(length + 1);
return(this);
}
public Builder Reserve(int capacity)
{
ValueOffsetsBufferBuilder.Reserve(capacity + 1);
ValidityBufferBuilder.Reserve(capacity + 1);
return(this);
}
