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1 package gnu.kawa.reflect;
2 import gnu.bytecode.Type;
3 import gnu.bytecode.ClassType;
4 import gnu.mapping.*;
5 import gnu.expr.*;
6
7 public class StaticSet extends Procedure1 implements Inlineable
8 {
9 ClassType ctype;
10 String  fname;
11 gnu.bytecode.Field field;
12 java.lang.reflect.Field reflectField;
13
14 StaticSet (Class clas, String fname)
15 {
16 ctype = (ClassType) gnu.bytecode.Type.make(clas);
17 this.fname = fname;
18 }
19
20 public StaticSet (ClassType ctype, String name, Type ftype, int flags)
21 {
22 this.ctype = ctype;
23 this.fname = name;
24 field = ctype.getField(name);
25 if (field == null)
26 field = ctype.addField(name, ftype, flags);
27 }
28
29 public Object apply1 (Object arg1)
30 {
31 if (reflectField == null)
32 {
33 Class clas = ctype.getReflectClass();
34 try
35 {
36 reflectField = clas.getField (fname);
37 }
38 catch (NoSuchFieldException ex)
39 {
40 throw new RuntimeException ("no such field "+fname
41 +" in "+clas.getName());
42 }
43 }
44 try
45 {
46 reflectField.set(null, arg1);
47 return Values.empty;
48 }
49 catch (IllegalAccessException ex)
50 {
51 throw new RuntimeException ("illegal access for field "+fname);
52 }
53 }
54
55 public void compile (ApplyExp exp, Compilation comp, Target target)
56 {
57 if (field == null)
58 {
59 field = ctype.getField(fname);
60 if (field == null)
61 field = ctype.addField(fname, Type.make(reflectField.getType()),
62 reflectField.getModifiers());
63 }
64 exp.getArgs()[0].compile(comp, field.getType());
65 gnu.bytecode.CodeAttr code = comp.getCode();
66 code.emitPutStatic(field);
67 comp.compileConstant(Values.empty, target);
68 }
69
70 public gnu.bytecode.Type getReturnType (Expression[] args)
71 {
72 return Type.void_type;
73 }
74 }
75 |
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