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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 StaticGet extends Procedure0 implements Inlineable
8 {
9 ClassType ctype;
10 String  fname;
11 gnu.bytecode.Field field;
12 java.lang.reflect.Field reflectField;
13
14 StaticGet (Class clas, String fname)
15 {
16 ctype = (ClassType) gnu.bytecode.Type.make(clas);
17 this.fname = fname;
18 }
19
20 public StaticGet (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 apply0 ()
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 return reflectField.get(null);
47 }
48 catch (IllegalAccessException ex)
49 {
50 throw new RuntimeException ("illegal access for field "+fname);
51 }
52 }
53
54 private gnu.bytecode.Field getField ()
55 {
56 if (field == null)
57 {
58 field = ctype.getField(fname);
59 if (field == null)
60 field = ctype.addField(fname, Type.make(reflectField.getType()),
61 reflectField.getModifiers());
62 }
63 return field;
64 }
65
66 public void compile (ApplyExp exp, Compilation comp, Target target)
67 {
68 getField();
69 gnu.bytecode.CodeAttr code = comp.getCode();
70 code.emitGetStatic(field);
71 target.compileFromStack(comp, field.getType());
72 }
73
74 public gnu.bytecode.Type getReturnType (Expression[] args)
75 {
76 return getField().getType();
77 }
78 }
79 |
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