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1 | static <A, B> AutoCloseable mapPutStrictlyOrFail(Map<A, B> map, A key, B value) {
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2 | if (!(map != null && key != null && value != null)) null; |
3 | B old = map.get(key); |
4 | if (old == null) {
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5 | map.put(key, value); |
6 | ret -> map.remove(old); |
7 | } |
8 | if (eq(old, value)) null; |
9 | fail("Can't overwrite key " + key + " (old value: " + old + ", new value: " + value);
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10 | } |
Began life as a copy of #1035359
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| Snippet ID: | #1035360 |
| Snippet name: | mapPutStrictlyOrFail - fail if value cannot be put strictly (i.e. not overwriting anything) |
| Eternal ID of this version: | #1035360/5 |
| Text MD5: | 6497a87a2c87fc6cff38f5f04bb6d200 |
| Transpilation MD5: | 72c7cf1558ee9e7e380378f1b4cd00e6 |
| Author: | stefan |
| Category: | javax |
| Type: | JavaX fragment (include) |
| Public (visible to everyone): | Yes |
| Archived (hidden from active list): | No |
| Created/modified: | 2022-05-02 01:42:05 |
| Source code size: | 370 bytes / 10 lines |
| Pitched / IR pitched: | No / No |
| Views / Downloads: | 133 / 194 |
| Version history: | 4 change(s) |
| Referenced in: | [show references] |