Transpiled version (4767L) is out of date.
1 | static class IndexedList<A> extends AbstractList<A> {
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2 | new ArrayList<A> l; |
3 | MultiMap<A, Int> index; |
4 | static bool debug; |
5 | |
6 | *() {}
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7 | *(L<A> x) {
|
8 | l.ensureCapacity(l(x)); |
9 | addAll(x); |
10 | } |
11 | |
12 | // required immutable list methods |
13 | |
14 | @Override |
15 | public A get(int i) {
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16 | ret l.get(i); |
17 | } |
18 | |
19 | @Override |
20 | public int size() {
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21 | ret l.size(); |
22 | } |
23 | |
24 | // required mutable list methods |
25 | |
26 | @Override |
27 | public A set(int i, A a) {
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28 | unindex(i); |
29 | A prev = l.get(i); |
30 | l.set(i, a); |
31 | index(i); |
32 | ret prev; |
33 | } |
34 | |
35 | @Override |
36 | public void add(int i, A a) {
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37 | if (i != l.size()) {
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38 | l.add(i, a); |
39 | index = null; |
40 | } else {
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41 | l.add(i, a); |
42 | index(i); |
43 | } |
44 | } |
45 | |
46 | @Override |
47 | public A remove(int i) {
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48 | A a = l.get(i); |
49 | l.remove(i); |
50 | index = null; |
51 | ret a; |
52 | } |
53 | |
54 | // speed up methods |
55 | |
56 | @Override |
57 | protected void removeRange(int fromIndex, int toIndex) {
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58 | l.subList(fromIndex, toIndex).clear(); |
59 | index = null; |
60 | } |
61 | |
62 | public int indexOf(O a) {
|
63 | ensureIndexed(); |
64 | L<Int> positions = index.get((A) a); |
65 | int n = l(positions); |
66 | int min = -1; |
67 | if (n != 0) {
|
68 | min = positions.get(0); |
69 | for (int i = 1; i < n; i++) {
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70 | int p = positions.get(i); |
71 | if (p < min) min = p; |
72 | } |
73 | } |
74 | if (debug) print("IndexedList.indexOf " + a + " => " + min);
|
75 | ret min; |
76 | } |
77 | |
78 | @Override |
79 | public bool contains(O a) {
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80 | ensureIndexed(); |
81 | bool b = index.containsKey((A) a); |
82 | if (debug) print("IndexedList.contains " + a + " => " + b);
|
83 | ret b; |
84 | } |
85 | |
86 | // indexing methods |
87 | |
88 | void unindex(int i) {
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89 | if (index != null) |
90 | index.remove(l.get(i), i); |
91 | } |
92 | |
93 | void index(int i) {
|
94 | if (index == null) |
95 | ensureIndexed(); |
96 | else |
97 | index.put(l.get(i), i); |
98 | } |
99 | |
100 | void ensureIndexed() {
|
101 | if (index == null) {
|
102 | index = new MultiMap; |
103 | int n = size(); |
104 | for (int i = 0; i < n; i++) |
105 | index.put(l.get(i), i); |
106 | } |
107 | } |
108 | } |
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| Snippet ID: | #1004042 |
| Snippet name: | IndexedList - use ContentsIndexedList instead |
| Eternal ID of this version: | #1004042/2 |
| Text MD5: | 654743973be99cb1e16940a41e94da66 |
| Author: | stefan |
| Category: | javax |
| Type: | JavaX fragment (include) |
| Public (visible to everyone): | Yes |
| Archived (hidden from active list): | No |
| Created/modified: | 2022-01-15 01:39:32 |
| Source code size: | 2049 bytes / 108 lines |
| Pitched / IR pitched: | No / No |
| Views / Downloads: | 624 / 1263 |
| Version history: | 1 change(s) |
| Referenced in: | [show references] |