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1 | // threshold must be at least 2 |
2 | // not synchronized |
3 | // untested |
4 | srecord BigLittleMapPolicy(Class<? extends Map> smallClass, Class<? extends Map> bigClass, int threshold) implements IMapImplementationPolicy {
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5 | bool nullOnEmpty = false; |
6 | |
7 | public <A, B> Map<A, B> makeSingletonMap(A key, B value) {
|
8 | ret put(null, key, value); |
9 | } |
10 | |
11 | public <A, B> Map<A, B> put(Map<A, B> map, A key, B value) {
|
12 | if (map == null) map = newInstance(smallClass); |
13 | if (l(map) == threshold-1 && !map.containsKey(key)) |
14 | map = putAll(newInstance(bigClass), map); |
15 | map.put(key, value); |
16 | ret map; |
17 | } |
18 | |
19 | public <A, B> Map<A, B> remove(Map<A, B> map, O key) {
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20 | if (map == null || !map.containsKey(key)) ret map; |
21 | map.remove(key); |
22 | int n = l(map); |
23 | if (n == threshold-1) |
24 | map = putAll(newInstance(smallClass), map); |
25 | ret nullOnEmpty && n == 0 ? null : map; |
26 | } |
27 | } |
Began life as a copy of #1031860
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| Snippet ID: | #1031861 |
| Snippet name: | BigLittleMapPolicy - uses two different map classes for small and big maps respectively |
| Eternal ID of this version: | #1031861/6 |
| Text MD5: | 30961b7883a186ca8bca57c435a31b32 |
| Transpilation MD5: | dcf698d285a16ad354b3a5be4c5766d3 |
| Author: | stefan |
| Category: | javax |
| Type: | JavaX fragment (include) |
| Public (visible to everyone): | Yes |
| Archived (hidden from active list): | No |
| Created/modified: | 2021-07-16 07:08:24 |
| Source code size: | 906 bytes / 27 lines |
| Pitched / IR pitched: | No / No |
| Views / Downloads: | 97 / 220 |
| Version history: | 5 change(s) |
| Referenced in: | [show references] |