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1
4 package gnu.mapping;
5
6 public class PlainLocation extends NamedLocation
7 {
8 public PlainLocation (Symbol symbol, Object  property)
9 {
10 super(symbol, property);
11 }
12
13 public PlainLocation (Symbol symbol, Object property, Object value)
14 {
15 super(symbol, property);
16 this.value = value;
17 }
18
19 public final Object get (Object defaultValue)
20 {
21 return base != null ? base.get(defaultValue)
22 : value == Location.UNBOUND ? defaultValue : value;
23 }
24
25 public boolean isBound ()
26 {
27 return base != null ? base.isBound() : value != Location.UNBOUND;
28 }
29
30 public final void set (Object newValue)
31 {
32 if (base == null)
33 value = newValue;
34 else if (value == DIRECT_ON_SET)
35 {
36 base = null;
37 value = newValue;
38 }
39 else if (base.isConstant())
40 getEnvironment().put(getKeySymbol(), getKeyProperty(), newValue);
41 else
42 base.set(newValue);
43 }
44 }
45 |
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