/**
* Parse a method declaration. The declaration should be in the following format:
*
* <p>fully-qualified-method-name (args)
*
* <p>where the arguments are comma separated and all arguments other than primitives should have
* fully qualified names. Arrays are indicating by trailing brackets. For example:
*
* <p>int int[] int[][] java.lang.String java.util.Date[]
*
* <p>The arguments are translated into BCEL types and a MethodDef is returned.
*/
private MethodDef parse_method(StrTok st) {
// Get the method name
String method_name = st.need_word();
// Get the opening paren
st.need("(");
// Read the arguments
ArrayList<String> args = new ArrayList<String>();
String tok = st.nextToken();
if (tok != ")") {
st.pushBack();
do {
tok = st.need_word();
args.add(tok);
} while (st.nextToken() == ",");
st.pushBack();
st.need(")");
}
// Convert the arguments to Type
Type[] targs = new Type[args.size()];
for (int ii = 0; ii < args.size(); ii++) {
targs[ii] = BCELUtil.classname_to_type(args.get(ii));
}
return new MethodDef(method_name, targs);
}
/**
* Transforms invoke instructions that match the specified list for this class to call the
* specified static call instead.
*/
private InstructionList xform_inst(MethodGen mg, Instruction inst) {
switch (inst.getOpcode()) {
case Constants.INVOKESTATIC:
{
InstructionList il = new InstructionList();
INVOKESTATIC is = (INVOKESTATIC) inst;
String cname = is.getClassName(pgen);
String mname = is.getMethodName(pgen);
Type[] args = is.getArgumentTypes(pgen);
MethodDef orig = new MethodDef(cname + "." + mname, args);
MethodInfo call = method_map.get(orig);
if (call != null) {
call.cnt++;
String classname = call.method_class;
String methodname = mname;
debug_map.log(
"%s.%s: Replacing method %s.%s (%s) with %s.%s%n",
mg.getClassName(),
mg.getName(),
cname,
mname,
UtilMDE.join(args, ", "),
classname,
methodname);
il.append(
ifact.createInvoke(
classname, methodname, is.getReturnType(pgen), args, Constants.INVOKESTATIC));
}
return (il);
}
case Constants.INVOKEVIRTUAL:
{
InstructionList il = new InstructionList();
INVOKEVIRTUAL iv = (INVOKEVIRTUAL) inst;
String cname = iv.getClassName(pgen);
String mname = iv.getMethodName(pgen);
Type[] args = iv.getArgumentTypes(pgen);
Type instance_type = iv.getReferenceType(pgen);
Type[] new_args = BCELUtil.insert_type(instance_type, args);
MethodDef orig = new MethodDef(cname + "." + mname, args);
if (debug_class) System.out.printf("looking for %s in map %s%n", orig, method_map);
MethodInfo call = method_map.get(orig);
if (call != null) {
call.cnt++;
String classname = call.method_class;
String methodname = mname;
debug_map.log(
"Replacing method %s.%s (%s) with %s.%s%n",
cname, mname, ArraysMDE.toString(args), classname, methodname);
il.append(
ifact.createInvoke(
classname,
methodname,
iv.getReturnType(pgen),
new_args,
Constants.INVOKESTATIC));
}
return (il);
}
default:
return (null);
}
}