This works:
public void visitCode(final Code obj) {
ConstantPoolGen cpg = new
ConstantPoolGen(javaClass.getConstantPool());
InstructionList list = new InstructionList(obj.getCode());
Iterator<InstructionHandle> iter = list.iterator();
while (iter.hasNext()) {
Instruction instruction =
((InstructionHandle)iter.next()).getInstruction();
if (instruction instanceof LDC) {
LDC load = (LDC)instruction;
if
(javaClass().getConstantPool().getConstant(load.getIndex()).getTag() ==
Const.CONSTANT_Class) {
Object val = load.getValue(cpg);
System.out.println(type.classFileName()
+ ": " + val);
}
}
}
}
-----Original Message-----
From: Stephan Herrmann [mailto:[email protected]]
Sent: Sunday, September 10, 2017 1:12 PM
To: [email protected]
Subject: [BCEL] Re: How can I recover .class references separate from other
references to classes using BCEL?
quick guess: check if the previous instruction is ldc.
HTH,
Stephan
On 10.09.2017 21:50, Showalter, Jim wrote:
> The use case is, suppose you want to recover the source from a .class file.
>
> In the original source, it said:
>
> public class SomeExperiment {
> public static void main(String[] args) {
> System.out.println(SomeOtherClass.class); <<< WANT TO RECOVER THE
> ".class" FROM HERE
> }
> }
>
> In the visitor I wrote, there's an override:
>
> public void visitConstantClass(final ConstantClass obj) {
> String className =
> JavaUtils.dotsToSlashes(javaClass().getConstantPool().getConstant(obj.getNameIndex()).toString());
> System.out.println(class file name + ": " + className);
> }
>
> Dumping out the data on a .class from a .java file that contains no
> occurrences of the string ".class", I get:
>
> com/intuit/qbo/Misc.class: com/intuit/qbo/Misc$Reader
> com/intuit/qbo/Misc.class: com/intuit/qbo/util/SomeException
> com/intuit/qbo/Misc.class: com/intuit/qbo/Misc
> com/intuit/qbo/Misc.class: com/intuit/qbo/api/MiscIf
>
> This means ClassConstant isn't just for .class references. It's for all
> references to classes.
>
> How can I use BCEL to recover the original ".class" reference in
> SomeExperiment?
>
> Jim Showalter
> Programmer
> Intuit, 2003H-265Z
> Garcia Avenue
> Mountain View, CA 94043
> (408) 353-4954
> (408) 204-1661
>
>
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