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1
4 package gnu.mapping;
5
6 public class ConstrainedLocation extends Location
7 {
8 protected Location base;
9
10 protected Procedure converter;
11
12 public static ConstrainedLocation make (Location base,
13 Procedure converter)
14 {
15 ConstrainedLocation cloc = new ConstrainedLocation();
16 cloc.base = base;
17 cloc.converter = converter;
18 return cloc;
19 }
20
21 public Symbol getKeySymbol ()
22 {
23 return base.getKeySymbol();
24 }
25
26 public Object  getKeyProperty ()
27 {
28 return base.getKeyProperty();
29 }
30
31 public boolean isConstant ()
32 {
33 return base.isConstant();
34 }
35
36 public final Object get (Object defaultValue)
37 {
38 return base.get(defaultValue);
39 }
40
41 public boolean isBound ()
42 {
43 return base.isBound();
44 }
45
46 protected Object coerce (Object newValue)
47 {
48 try
49 {
50 return converter.apply1(newValue);
51 }
52 catch (Throwable ex)
53 {
54 throw WrappedException.wrapIfNeeded(ex);
55 }
56 }
57
58 public final void set (Object newValue)
59 {
60 base.set(coerce(newValue));
61 }
62
63 public Object setWithSave (Object newValue, CallContext ctx)
64 {
65 return base.setWithSave(coerce(newValue), ctx);
66 }
67
68 public void setRestore (Object oldValue, CallContext ctx)
69 {
70 base.setRestore(oldValue, ctx);
71 }
72 }
73
74 |
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