vortex_array/arrays/extension/vtable/
mod.rs

1// SPDX-License-Identifier: Apache-2.0
2// SPDX-FileCopyrightText: Copyright the Vortex contributors
3
4mod array;
5mod canonical;
6mod kernel;
7mod operations;
8mod validity;
9mod visitor;
10
11use kernel::PARENT_KERNELS;
12use vortex_dtype::DType;
13use vortex_error::VortexExpect;
14use vortex_error::VortexResult;
15use vortex_error::vortex_bail;
16use vortex_error::vortex_ensure;
17use vortex_session::VortexSession;
18
19use crate::ArrayRef;
20use crate::EmptyMetadata;
21use crate::ExecutionCtx;
22use crate::arrays::extension::ExtensionArray;
23use crate::arrays::extension::compute::rules::PARENT_RULES;
24use crate::buffer::BufferHandle;
25use crate::serde::ArrayChildren;
26use crate::vtable;
27use crate::vtable::ArrayId;
28use crate::vtable::VTable;
29use crate::vtable::ValidityVTableFromChild;
30
31vtable!(Extension);
32
33impl VTable for ExtensionVTable {
34    type Array = ExtensionArray;
35
36    type Metadata = EmptyMetadata;
37
38    type ArrayVTable = Self;
39    type OperationsVTable = Self;
40    type ValidityVTable = ValidityVTableFromChild;
41    type VisitorVTable = Self;
42
43    fn id(_array: &Self::Array) -> ArrayId {
44        Self::ID
45    }
46
47    fn metadata(_array: &ExtensionArray) -> VortexResult<Self::Metadata> {
48        Ok(EmptyMetadata)
49    }
50
51    fn serialize(_metadata: Self::Metadata) -> VortexResult<Option<Vec<u8>>> {
52        Ok(Some(vec![]))
53    }
54
55    fn deserialize(
56        _bytes: &[u8],
57        _dtype: &DType,
58        _len: usize,
59        _buffers: &[BufferHandle],
60        _session: &VortexSession,
61    ) -> VortexResult<Self::Metadata> {
62        Ok(EmptyMetadata)
63    }
64
65    fn build(
66        dtype: &DType,
67        len: usize,
68        _metadata: &Self::Metadata,
69        _buffers: &[BufferHandle],
70        children: &dyn ArrayChildren,
71    ) -> VortexResult<ExtensionArray> {
72        let DType::Extension(ext_dtype) = dtype else {
73            vortex_bail!("Not an extension DType");
74        };
75        if children.len() != 1 {
76            vortex_bail!("Expected 1 child, got {}", children.len());
77        }
78        let storage = children.get(0, ext_dtype.storage_dtype(), len)?;
79        Ok(ExtensionArray::new(ext_dtype.clone(), storage))
80    }
81
82    fn with_children(array: &mut Self::Array, children: Vec<ArrayRef>) -> VortexResult<()> {
83        vortex_ensure!(
84            children.len() == 1,
85            "ExtensionArray expects exactly 1 child (storage), got {}",
86            children.len()
87        );
88        array.storage = children
89            .into_iter()
90            .next()
91            .vortex_expect("children length already validated");
92        Ok(())
93    }
94
95    fn execute(array: &Self::Array, _ctx: &mut ExecutionCtx) -> VortexResult<ArrayRef> {
96        Ok(array.to_array())
97    }
98
99    fn reduce_parent(
100        array: &Self::Array,
101        parent: &ArrayRef,
102        child_idx: usize,
103    ) -> VortexResult<Option<ArrayRef>> {
104        PARENT_RULES.evaluate(array, parent, child_idx)
105    }
106
107    fn execute_parent(
108        array: &Self::Array,
109        parent: &ArrayRef,
110        child_idx: usize,
111        ctx: &mut ExecutionCtx,
112    ) -> VortexResult<Option<ArrayRef>> {
113        PARENT_KERNELS.execute(array, parent, child_idx, ctx)
114    }
115}
116
117#[derive(Debug)]
118pub struct ExtensionVTable;
119
120impl ExtensionVTable {
121    pub const ID: ArrayId = ArrayId::new_ref("vortex.ext");
122}
vortex_array/arrays/extension/vtable/mod.rs

vortex_array/arrays/extension/vtable/
mod.rs
