1 | ifndef SymbolAsString |
2 | |
3 | static WeakHasherMap<Symbol, Bool> symbol_map = new WeakHasherMap(new Hasher<Symbol>() {
|
4 | public int hashCode(Symbol symbol) { ret symbol.text.hashCode(); }
|
5 | public bool equals(Symbol a, Symbol b) {
|
6 | if (a == null) ret b == null; |
7 | ret b != null && eq(a.text, b.text); |
8 | } |
9 | }); |
10 | |
11 | static WeakHasherMap<MasterSymbol, Bool> masterSymbol_map = new WeakHasherMap(new Hasher<MasterSymbol>() {
|
12 | public int hashCode(MasterSymbol symbol) { ret symbol.lowerCaseHash(); }
|
13 | public bool equals(MasterSymbol a, MasterSymbol b) {
|
14 | if (a == null) ret b == null; |
15 | ret b != null && eq(a.lowerCase(), b.lowerCase()); |
16 | } |
17 | }); |
18 | |
19 | endifndef |
20 | |
21 | static Symbol symbol(S s) {
|
22 | ifdef SymbolAsString |
23 | ret s; |
24 | endifdef |
25 | ifndef SymbolAsString |
26 | if (s == null) null; |
27 | synchronized(symbol_map) {
|
28 | MasterSymbol master = new MasterSymbol(s, true); |
29 | MasterSymbol existingMaster = masterSymbol_map.findKey(master); |
30 | if (existingMaster == null) |
31 | masterSymbol_map.put(existingMaster = master, true); |
32 | ifdef symbol_debug |
33 | if (eqic(s, "Java")) |
34 | print("existing master for " + s + ": " + existingMaster);
|
35 | endifdef |
36 | |
37 | // directly return master if exact match |
38 | bool isEq = eq(s, existingMaster.text); |
39 | if (isEq) ret existingMaster; |
40 | |
41 | // second lookup after master found |
42 | Symbol symbol = new Symbol(s, existingMaster); |
43 | Symbol existingSymbol = symbol_map.findKey(symbol); |
44 | if (existingSymbol == null) |
45 | symbol_map.put(existingSymbol = symbol, true); |
46 | ifdef symbol_debug |
47 | if (eqic(s, "Java")) |
48 | print("Symbol for " + s + ": " + symbolToStringFull(existingSymbol);
|
49 | endifdef |
50 | |
51 | ret existingSymbol; |
52 | } |
53 | endifndef |
54 | } |
55 | |
56 | static Symbol symbol(CharSequence s) {
|
57 | if (s == null) null; |
58 | ifdef SymbolAsString |
59 | ret str(s); |
60 | endifdef |
61 | ifndef SymbolAsString |
62 | if (s instanceof Symbol) ret (Symbol) s; |
63 | if (s instanceof S) ret symbol((S) s); |
64 | ret symbol(str(s)); |
65 | endifndef |
66 | } |
67 | |
68 | static Symbol symbol(O o) {
|
69 | ret symbol((CharSequence) o); |
70 | } |
Began life as a copy of #1012686
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| Snippet ID: | #1031625 |
| Snippet name: | symbol - make Symbol from String or CharSequence - case-insensitive version with MasterSymbol [backup] |
| Eternal ID of this version: | #1031625/1 |
| Text MD5: | 4d8d74b3f5e9afba5cba41ef026f3c11 |
| Author: | stefan |
| Category: | javax |
| Type: | JavaX fragment (include) |
| Public (visible to everyone): | Yes |
| Archived (hidden from active list): | No |
| Created/modified: | 2021-06-22 13:05:10 |
| Source code size: | 2075 bytes / 70 lines |
| Pitched / IR pitched: | No / No |
| Views / Downloads: | 152 / 176 |
| Referenced in: | [show references] |