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comparison src/fschmidt/util/java/SimpleCache.java @ 68:00520880ad02

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add fschmidt source
author Franklin Schmidt <fschmidt@gmail.com>
date Sun, 05 Oct 2025 17:24:15 -0600
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67:9d0fefce6985 68:00520880ad02
1 package fschmidt.util.java;
2
3 import java.util.Map;
4
5
6 public final class SimpleCache<A,V> implements Computable<A,V> {
7 private final Map<A,V> map;
8 private final Computable<A,V> comp;
9
10 public SimpleCache(Map<A,V> map,Computable<A,V> comp) {
11 this.map = map;
12 this.comp = comp;
13 }
14
15 public synchronized V get(A arg) throws ComputationException {
16 V val = map.get(arg);
17 if( val == null ) {
18 try {
19 val = comp.get(arg);
20 } catch(RuntimeException e) {
21 throw e;
22 } catch(Exception e) {
23 throw new ComputationException(e);
24 }
25 map.put(arg,val);
26 }
27 return val;
28 }
29
30 public synchronized void remove(A arg) {
31 map.remove(arg);
32 }
33
34 }