Transpiled version (67608L) is out of date.
1 | concept G22Variable extends ConceptWithChangeListeners is IPersistenceInfo, AutoCloseable {
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2 | settableWithVar S name; |
3 | volatile O value; |
4 | settableWithVar bool persistent; |
5 | |
6 | // dispose of resource when project is closed |
7 | // or variable is deleted/overwritten |
8 | settable bool autoClose; |
9 | |
10 | // big = value is stored in separate file |
11 | settableWithVar bool big; |
12 | |
13 | transient Lock loadLock = lock(); |
14 | |
15 | // field "value" is persisted iff field "persistent" is set |
16 | public Map _persistenceInfo() { ret litmap(value := persistent && !big); }
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17 | |
18 | public transient simplyCached FieldVar<O> varValue() {
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19 | ret new FieldVar<O>(this, "value", () -> value(), value -> value(value)); |
20 | } |
21 | |
22 | void setValueIfNull(O defaultValue) {
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23 | if (defaultValue != null && value == null) value(defaultValue); |
24 | } |
25 | |
26 | O cachedValue() { ret value; }
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27 | |
28 | O get aka value() {
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29 | if (value != null) ret value; |
30 | if (big) ret getBigValue(); |
31 | ret value; |
32 | } |
33 | |
34 | O getOnce() {
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35 | if (value != null) ret value; |
36 | if (big) ret loadBigValueImpl(); |
37 | ret value; |
38 | } |
39 | |
40 | G22Utils g22utils() {
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41 | ret main g22utils(this); |
42 | } |
43 | |
44 | File bigFile() {
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45 | ret newFile(assertNotNull(g22utils().projectDir()), id + "-" + sanitizeFileName(name) + ".structgz"); |
46 | } |
47 | |
48 | O getBigValue() {
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49 | O o; |
50 | {
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51 | lock loadLock; |
52 | o = loadBigValueImpl(); |
53 | setValueField(o); |
54 | } |
55 | g22utils().bigVariableLoaded(this); |
56 | ret o; |
57 | } |
58 | |
59 | O loadBigValueImpl() {
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60 | ret unstructureGZFile(bigFile(), g22utils().classFinder()); |
61 | } |
62 | |
63 | void setBigValue(O value) {
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64 | if (value == null) {
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65 | if (hasBigValue()) {
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66 | deleteBigValue(); |
67 | change(); |
68 | } |
69 | } else {
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70 | unload(); |
71 | File f = bigFile(); |
72 | saveGZStructureToFile(f, value); |
73 | change(); |
74 | } |
75 | } |
76 | |
77 | void deleteBigValue() {
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78 | deleteFile(bigFile()); |
79 | } |
80 | |
81 | bool hasBigValue() {
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82 | ret fileExists(bigFile()); |
83 | } |
84 | |
85 | void makeBig {
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86 | if (big) ret; |
87 | setBigValue(value); |
88 | big(true); |
89 | persistent(true); |
90 | } |
91 | |
92 | void makeSmall {
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93 | if (!big) ret; |
94 | get(); // will cache the value |
95 | big(false); |
96 | deleteBigValue(); |
97 | } |
98 | |
99 | selfType value aka setValue aka set(O o) {
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100 | if (big) |
101 | setBigValue(o); |
102 | else if (!eq(value, o)) {
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103 | setValueField(o); |
104 | change(); |
105 | } |
106 | this; |
107 | } |
108 | |
109 | // Always overwrite even if eq to old value |
110 | selfType set_force(O o) {
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111 | if (big) |
112 | setBigValue(o); |
113 | else {
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114 | setValueField(o); |
115 | change(); |
116 | } |
117 | this; |
118 | } |
119 | |
120 | bool notNull aka has() {
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121 | ret big ? hasBigValue() : value != null; |
122 | } |
123 | |
124 | void unload() {
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125 | if (big) setValueField(null); |
126 | } |
127 | |
128 | O setValueField(O o) {
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129 | if (autoClose && o != value) |
130 | dispose value; |
131 | ret value = o; |
132 | } |
133 | |
134 | close {
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135 | if (autoClose) |
136 | dispose value; |
137 | } |
138 | |
139 | void delete :: before { close(); }
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140 | |
141 | void changeInsideOfValue {
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142 | if (big) |
143 | value(value); |
144 | change(); |
145 | } |
146 | |
147 | void clear {
|
148 | set(null); |
149 | } |
150 | |
151 | selfType makePersistent() {
|
152 | ret persistent(true); |
153 | } |
154 | } |
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| Snippet ID: | #1034711 |
| Snippet name: | G22Variable - a project-wide variable (name + any Java value, optionally persistent) |
| Eternal ID of this version: | #1034711/41 |
| Text MD5: | f2ade3b467ea9e04adbd054fbf354912 |
| Author: | stefan |
| Category: | javax / gazelle 22 |
| Type: | JavaX fragment (include) |
| Public (visible to everyone): | Yes |
| Archived (hidden from active list): | No |
| Created/modified: | 2023-08-07 15:35:08 |
| Source code size: | 3153 bytes / 154 lines |
| Pitched / IR pitched: | No / No |
| Views / Downloads: | 226 / 507 |
| Version history: | 40 change(s) |
| Referenced in: | [show references] |