reifydb-core 0.4.11

Core database interfaces and data structures for ReifyDB
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90

// SPDX-License-Identifier: Apache-2.0
// Copyright (c) 2025 ReifyDB

use super::{EncodableKey, KeyKind};
use crate::{
	encoded::key::{EncodedKey, EncodedKeyRange},
	interface::catalog::id::NamespaceId,
	util::encoding::keycode::{deserializer::KeyDeserializer, serializer::KeySerializer},
};

#[derive(Debug, Clone, PartialEq)]
pub struct NamespaceKey {
	pub namespace: NamespaceId,
}

const VERSION: u8 = 1;

impl EncodableKey for NamespaceKey {
	const KIND: KeyKind = KeyKind::Namespace;

	fn encode(&self) -> EncodedKey {
		let mut serializer = KeySerializer::with_capacity(10);
		serializer.extend_u8(VERSION).extend_u8(Self::KIND as u8).extend_u64(self.namespace);
		serializer.to_encoded_key()
	}

	fn decode(key: &EncodedKey) -> Option<Self> {
		let mut de = KeyDeserializer::from_bytes(key.as_slice());

		let version = de.read_u8().ok()?;
		if version != VERSION {
			return None;
		}

		let kind: KeyKind = de.read_u8().ok()?.try_into().ok()?;
		if kind != Self::KIND {
			return None;
		}

		let namespace = de.read_u64().ok()?;

		Some(Self {
			namespace: NamespaceId(namespace),
		})
	}
}

impl NamespaceKey {
	pub fn encoded(namespace: impl Into<NamespaceId>) -> EncodedKey {
		Self {
			namespace: namespace.into(),
		}
		.encode()
	}

	pub fn full_scan() -> EncodedKeyRange {
		EncodedKeyRange::start_end(Some(Self::namespace_start()), Some(Self::namespace_end()))
	}

	fn namespace_start() -> EncodedKey {
		let mut serializer = KeySerializer::with_capacity(2);
		serializer.extend_u8(VERSION).extend_u8(Self::KIND as u8);
		serializer.to_encoded_key()
	}

	fn namespace_end() -> EncodedKey {
		let mut serializer = KeySerializer::with_capacity(2);
		serializer.extend_u8(VERSION).extend_u8(Self::KIND as u8 - 1);
		serializer.to_encoded_key()
	}
}

#[cfg(test)]
pub mod tests {
	use super::{EncodableKey, NamespaceKey};
	use crate::interface::catalog::id::NamespaceId;

	#[test]
	fn test_encode_decode() {
		let key = NamespaceKey {
			namespace: NamespaceId(0xABCD),
		};
		let encoded = key.encode();
		let expected = vec![0xFE, 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x54, 0x32];
		assert_eq!(encoded.as_slice(), expected);

		let key = NamespaceKey::decode(&encoded).unwrap();
		assert_eq!(key.namespace, 0xABCD);
	}
}