Well I figured it ok. (i have a typo in the code below too). I manually copied
the MethodGen instead of using copy(). It worked just fine. MethodGen.copy() calls
clone(). I never understood what Object.clone() does. So an explicit
copy worked.
james
On Mon, Jul 19, 2004 at 10:18:46AM -0700, James Sasitorn wrote:
> I am trying to copy methods from one class to another. This is the code I have been
> woking on. I am getting errors with the resulting constant pool. Is this the correct
> way to copy a method, or am i misunderstanding the API.
>
> thanks,
>
> james
>
> public static void main(String[] args) {
> JavaClass j1 = new ClassParser("A.class").parse();
> JavaClass j2 = new ClassParser("B.class").parse();
> copyCode(j1,j2);
> }
>
> public static void copyCode(JavaClass src, JavaClass dest) {
>
> ClassGen cg1 = new ClassGen(dest);
> ClassGen cg2 = new ClassGen(dest);
> ConstantPoolGen cp1 = cg1.getConstantPool();
> ConstantPoolGen cp2 = cg2.getConstantPool();
>
> Method[] methods = src.getMethods();
> for (int i=0; i< methods.length; i++) {
> MethodGen m = new MethodGen(methods[i],
> src.getClassName(),
> cp1);
>
> MethodGen m2 = m.copy(cg2.getClassName(), cp2);
>
> printCode(new Method[] {m2.getMethod()}, true);
> cg2.addMethod(m2.getMethod());
> }
>
> JavaClass c3 = cg2.getJavaClass();
> c3.setConstantPool(cp2.getFinalConstantPool());
>
> try {
> c3.dump("test.class");
> } catch (IOException e) {
> System.out.println(e.getStackTrace());
> }
> }
>
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