1 | static <A> Set<A> setWithNotifyOnAdd(final VF1<A> onAdd) {
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2 | ret setWithNotifyOnAdd(onAdd, new HashSet); |
3 | } |
4 | |
5 | static <A> Set<A> setWithNotifyOnAdd(final VF1<A> onAdd, Set<A> set) {
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6 | ret new NotifyingSet<A>(set) {
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7 | void change() {}
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8 | |
9 | public bool add(A a) {
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10 | if (!super.add(a)) false; |
11 | ret true with callF(onAdd, a); |
12 | } |
13 | |
14 | public bool addAll(Collection<? extends A> l) {
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15 | bool change = false; |
16 | for (A a : l) if (add(a)) change = true; |
17 | ret change; |
18 | } |
19 | }; |
20 | } |
Began life as a copy of #1020632
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| Snippet ID: | #1021582 |
| Snippet name: | setWithNotifyOnAdd - returns synchronized set that calls callback on successful add() (where element wasn't there before) |
| Eternal ID of this version: | #1021582/7 |
| Text MD5: | aef1e8332b91015e13250647724e6ab4 |
| Author: | stefan |
| Category: | javax / collections |
| Type: | JavaX fragment (include) |
| Public (visible to everyone): | Yes |
| Archived (hidden from active list): | No |
| Created/modified: | 2019-02-19 11:44:30 |
| Source code size: | 520 bytes / 20 lines |
| Pitched / IR pitched: | No / No |
| Views / Downloads: | 325 / 331 |
| Version history: | 6 change(s) |
| Referenced in: | [show references] |