blob: 9de2628b3187d7e22caae3dca3d36531e356daf3 (
plain) (
blame)
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
|
// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "entryref.h"
namespace vespalib::datastore {
/**
* Less-than comparator for two entries based on entry refs.
*
* Valid entry ref is mapped to an entry in a data store.
* Invalid entry ref is mapped to a temporary entry owned or referenced by comparator instance.
*/
class EntryComparator {
public:
virtual ~EntryComparator() {}
/**
* Returns true if the value represented by lhs ref is less than the value represented by rhs ref.
*/
virtual bool less(const EntryRef lhs, const EntryRef rhs) const = 0;
virtual bool equal(const EntryRef lhs, const EntryRef rhs) const = 0;
virtual size_t hash(const EntryRef rhs) const = 0;
};
}
|
