reifydb_core/key/
namespace_view.rs

1// SPDX-License-Identifier: Apache-2.0
2// Copyright (c) 2026 ReifyDB
3
4use reifydb_codec::key::{
5	deserializer::KeyDeserializer,
6	encoded::{EncodedKey, EncodedKeyRange},
7	serializer::KeySerializer,
8};
9
10use super::{EncodableKey, KeyKind};
11use crate::interface::catalog::id::{NamespaceId, ViewId};
12
13#[derive(Debug, Clone, PartialEq)]
14pub struct NamespaceViewKey {
15	pub namespace: NamespaceId,
16	pub view: ViewId,
17}
18
19impl EncodableKey for NamespaceViewKey {
20	const KIND: KeyKind = KeyKind::NamespaceView;
21
22	fn encode(&self) -> EncodedKey {
23		let mut serializer = KeySerializer::with_capacity(17);
24		serializer.extend_u8(Self::KIND as u8).extend_u64(self.namespace).extend_u64(self.view);
25		serializer.to_encoded_key()
26	}
27
28	fn decode(key: &EncodedKey) -> Option<Self> {
29		let mut de = KeyDeserializer::from_bytes(key.as_slice());
30
31		let kind: KeyKind = de.read_u8().ok()?.try_into().ok()?;
32		if kind != Self::KIND {
33			return None;
34		}
35
36		let namespace = de.read_u64().ok()?;
37		let view = de.read_u64().ok()?;
38
39		Some(Self {
40			namespace: NamespaceId(namespace),
41			view: ViewId(view),
42		})
43	}
44}
45
46impl NamespaceViewKey {
47	pub fn encoded(namespace: impl Into<NamespaceId>, view: impl Into<ViewId>) -> EncodedKey {
48		Self {
49			namespace: namespace.into(),
50			view: view.into(),
51		}
52		.encode()
53	}
54
55	pub fn full_scan(namespace_id: NamespaceId) -> EncodedKeyRange {
56		EncodedKeyRange::start_end(Some(Self::link_start(namespace_id)), Some(Self::link_end(namespace_id)))
57	}
58
59	fn link_start(namespace_id: NamespaceId) -> EncodedKey {
60		let mut serializer = KeySerializer::with_capacity(9);
61		serializer.extend_u8(Self::KIND as u8).extend_u64(namespace_id);
62		serializer.to_encoded_key()
63	}
64
65	fn link_end(namespace_id: NamespaceId) -> EncodedKey {
66		let mut serializer = KeySerializer::with_capacity(9);
67		serializer.extend_u8(Self::KIND as u8).extend_u64(*namespace_id - 1);
68		serializer.to_encoded_key()
69	}
70}
71
72#[cfg(test)]
73pub mod tests {
74	use super::{EncodableKey, NamespaceViewKey};
75	use crate::interface::catalog::id::{NamespaceId, ViewId};
76
77	#[test]
78	fn test_encode_decode() {
79		let key = NamespaceViewKey {
80			namespace: NamespaceId(0xABCD),
81			view: ViewId(0x123456789ABCDEF0),
82		};
83		let encoded = key.encode();
84
85		let expected: Vec<u8> =
86			vec![0xEE, 0x3F, 0x54, 0x32, 0x00, 0xED, 0xCB, 0xA9, 0x87, 0x65, 0x43, 0x21, 0x0F];
87
88		assert_eq!(encoded.as_slice(), expected);
89
90		let key = NamespaceViewKey::decode(&encoded).unwrap();
91		assert_eq!(key.namespace, 0xABCD);
92		assert_eq!(key.view, 0x123456789ABCDEF0);
93	}
94
95	#[test]
96	fn test_order_preserving() {
97		let key1 = NamespaceViewKey {
98			namespace: NamespaceId::SYSTEM,
99			view: ViewId(100),
100		};
101		let key2 = NamespaceViewKey {
102			namespace: NamespaceId::SYSTEM,
103			view: ViewId(200),
104		};
105		let key3 = NamespaceViewKey {
106			namespace: NamespaceId::DEFAULT,
107			view: ViewId(1),
108		};
109
110		let encoded1 = key1.encode();
111		let encoded2 = key2.encode();
112		let encoded3 = key3.encode();
113
114		assert!(encoded3 < encoded2, "ordering not preserved");
115		assert!(encoded2 < encoded1, "ordering not preserved");
116	}
117}
reifydb_core/key/namespace_view.rs

reifydb_core/key/
namespace_view.rs
