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1 | // allows null keys but not null values |
2 | |
3 | static <A, B> B getOrCreate(Map<A, B> map, A key, Class<? extends B> c) ctex {
|
4 | B b = map.get(key); |
5 | if (b == null) |
6 | map.put(key, b = c.newInstance()); |
7 | ret b; |
8 | } |
9 | |
10 | // f : func -> B |
11 | static <A, B> B getOrCreate(Map<A, B> map, A key, O f) ctex {
|
12 | B b = map.get(key); |
13 | if (b == null) |
14 | map.put(key, b = (B) callF(f)); |
15 | ret b; |
16 | } |
17 | |
18 | static <A, B> B getOrCreate(IF0<B> f, Map<A, B> map, A key) {
|
19 | ret getOrCreate(map, key, f); |
20 | } |
21 | |
22 | static <A, B> B getOrCreate(Map<A, B> map, A key, IF0<B> f) {
|
23 | B b = map.get(key); |
24 | if (b == null) |
25 | map.put(key, b = f!); |
26 | ret b; |
27 | } |
28 | |
29 | static <A, B> B nuLike getOrCreate(Class<? extends B> c, Map<A, B> map, A key) {
|
30 | ret getOrCreate(map, key, c); |
31 | } |
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| Snippet ID: | #1013935 |
| Snippet name: | getOrCreate - map lookup or create from class |
| Eternal ID of this version: | #1013935/12 |
| Text MD5: | c8e1aa1765798e0d379e4436ee7d2d1e |
| Transpilation MD5: | ab872c665638ad04b8f3adce12cfa3e4 |
| Author: | stefan |
| Category: | javax |
| Type: | JavaX fragment (include) |
| Public (visible to everyone): | Yes |
| Archived (hidden from active list): | No |
| Created/modified: | 2021-07-23 19:36:39 |
| Source code size: | 756 bytes / 31 lines |
| Pitched / IR pitched: | No / No |
| Views / Downloads: | 505 / 597 |
| Version history: | 11 change(s) |
| Referenced in: | [show references] |