function build()

in src/table.jl [1001:1038]

• 38 lines of code
• 4 McCabe index (conditional complexity)

function build(
    f::Meta.Field,
    L::Meta.Union,
    batch,
    rb,
    de,
    nodeidx,
    bufferidx,
    varbufferidx,
    convert,
)
    @debug "building array: L = $L"
    buffer = rb.buffers[bufferidx]
    bytes, typeIds = reinterp(UInt8, batch, buffer, rb.compression)
    bufferidx += 1
    if L.mode == Meta.UnionMode.Dense
        buffer = rb.buffers[bufferidx]
        bytes2, offsets = reinterp(Int32, batch, buffer, rb.compression)
        bufferidx += 1
    end
    vecs = []
    nodeidx += 1
    for child in f.children
        A, nodeidx, bufferidx, varbufferidx =
            build(child, batch, rb, de, nodeidx, bufferidx, varbufferidx, convert)
        push!(vecs, A)
    end
    data = Tuple(vecs)
    meta = buildmetadata(f.custom_metadata)
    T = juliaeltype(f, meta, convert)
    UT = UnionT(f, convert)
    if L.mode == Meta.UnionMode.Dense
        B = DenseUnion{T,UT,typeof(data)}(bytes, bytes2, typeIds, offsets, data, meta)
    else
        B = SparseUnion{T,UT,typeof(data)}(bytes, typeIds, data, meta)
    end
    return B, nodeidx, bufferidx, varbufferidx
end