small_db/btree/page/
page.rs

1use super::BTreePageID;
2use crate::btree::tuple::Schema;
3
4pub trait BTreePage {
5    fn new(
6        pid: &BTreePageID,
7        bytes: &[u8],
8        tuple_scheme: &Schema,
9        key_field: usize,
10    ) -> Self
11    where
12        Self: Sized;
13
14    fn get_pid(&self) -> BTreePageID;
15
16    fn get_parent_pid(&self) -> BTreePageID;
17    fn set_parent_pid(&mut self, pid: &BTreePageID);
18
19    /// Generates a byte array representing the contents of this page.
20    /// Used to serialize this page to disk.
21    ///
22    /// The invariant here is that it should be possible to pass the
23    /// byte array generated by get_page_data to the BTreePage
24    /// constructor and have it produce an identical BTreeLeafPage
25    /// object.
26    ///
27    /// # Returns
28    /// A byte array representing the contents of this page.
29    fn get_page_data(&self) -> Vec<u8>;
30
31    fn set_before_image(&mut self);
32
33    /// Provide a representation of this page before any modifications
34    /// were made to it. Used by recovery.
35    fn get_before_image(&self) -> Vec<u8>;
36
37    fn peek(&self);
38}
small_db/btree/page/page.rs

small_db/btree/page/
page.rs
