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1 | // still efficient when used to build a list recursively |
2 | persistable sclass ConcatOnDemandList<A> extends RandomAccessAbstractList<A> {
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3 | new LL<A> parts; |
4 | L<A> completeList; |
5 | |
6 | *(L<A>... parts) { fOr (part : parts) addPart(part); }
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7 | |
8 | void addPart(L<A> part) { parts.add(part); }
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9 | |
10 | public int size() { ret completeList().size(); }
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11 | public A get(int i) { ret completeList().get(i); }
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12 | |
13 | L<A> completeList() {
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14 | if (parts != null) {
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15 | new L<A> out; |
16 | for (part : parts) |
17 | collect(part, out); |
18 | parts = null; |
19 | completeList = out; |
20 | } |
21 | ret completeList; |
22 | } |
23 | |
24 | void collect(L<A> part, L<A> out) {
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25 | if (part == null) ret; |
26 | if (part cast ConcatOnDemandList) |
27 | part.collectInto(out); |
28 | else |
29 | out.addAll(part); |
30 | } |
31 | |
32 | void collectInto(L<A> out) {
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33 | if (parts != null) |
34 | for (part : parts) |
35 | collect(part, out); |
36 | else |
37 | out.addAll(completeList); |
38 | } |
39 | } |
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| Snippet ID: | #1035860 |
| Snippet name: | ConcatOnDemandList |
| Eternal ID of this version: | #1035860/9 |
| Text MD5: | dc8d62b783030d610843868cf7119196 |
| Transpilation MD5: | 7de169259f23bd7d88c308bbb4c5fd91 |
| Author: | stefan |
| Category: | javax / gazelle 22 |
| Type: | JavaX fragment (include) |
| Public (visible to everyone): | Yes |
| Archived (hidden from active list): | No |
| Created/modified: | 2022-08-03 07:01:04 |
| Source code size: | 962 bytes / 39 lines |
| Pitched / IR pitched: | No / No |
| Views / Downloads: | 83 / 151 |
| Version history: | 8 change(s) |
| Referenced in: | [show references] |