vortex-array 0.54.0

// SPDX-License-Identifier: Apache-2.0
// SPDX-FileCopyrightText: Copyright the Vortex contributors

use std::sync::Arc;

use vortex_buffer::{Buffer, ByteBuffer};
use vortex_dtype::DType;
use vortex_error::{VortexExpect, VortexResult, vortex_bail};

use super::VarBinViewVTable;
use crate::EmptyMetadata;
use crate::arrays::binary_view::BinaryView;
use crate::arrays::{VarBinViewArray, VarBinViewEncoding};
use crate::serde::ArrayChildren;
use crate::validity::Validity;
use crate::vtable::SerdeVTable;

impl SerdeVTable<VarBinViewVTable> for VarBinViewVTable {
    type Metadata = EmptyMetadata;

    fn metadata(_array: &VarBinViewArray) -> VortexResult<Option<Self::Metadata>> {
        Ok(Some(EmptyMetadata))
    }

    fn build(
        _encoding: &VarBinViewEncoding,
        dtype: &DType,
        len: usize,
        _metadata: &Self::Metadata,
        buffers: &[ByteBuffer],
        children: &dyn ArrayChildren,
    ) -> VortexResult<VarBinViewArray> {
        if buffers.is_empty() {
            vortex_bail!("Expected at least 1 buffer, got {}", buffers.len());
        }
        let mut buffers: Vec<ByteBuffer> = buffers.to_vec();
        let views = buffers.pop().vortex_expect("buffers non-empty");

        let views = Buffer::<BinaryView>::from_byte_buffer(views);

        if views.len() != len {
            vortex_bail!("Expected {} views, got {}", len, views.len());
        }

        let validity = if children.is_empty() {
            Validity::from(dtype.nullability())
        } else if children.len() == 1 {
            let validity = children.get(0, &Validity::DTYPE, len)?;
            Validity::Array(validity)
        } else {
            vortex_bail!("Expected 0 or 1 children, got {}", children.len());
        };

        VarBinViewArray::try_new(views, Arc::from(buffers), dtype.clone(), validity)
    }
}