final ConstantPoolGen cpg = classGen.getConstantPool();
final InstructionList il = methodGen.getInstructionList();
if (_path != null) {
final int initDFI = cpg.addMethodref(DUP_FILTERED_ITERATOR,
"<init>",
"("
+ NODE_ITERATOR_SIG
+ ")V");
// Backwards branches are prohibited if an uninitialized object is
// on the stack by section 4.9.4 of the JVM Specification, 2nd Ed.
// We don't know whether this code might contain backwards branches,
// so we mustn't create the new object until after we've created
// the suspect arguments to its constructor. Instead we calculate
// the values of the arguments to the constructor first, store them
// in temporary variables, create the object and reload the
// arguments from the temporaries to avoid the problem.
// Compile relative path iterator(s)
LocalVariableGen pathTemp =
methodGen.addLocalVariable("filtered_absolute_location_path_tmp",
Util.getJCRefType(NODE_ITERATOR_SIG),
il.getEnd(), null);
_path.translate(classGen, methodGen);
il.append(new ASTORE(pathTemp.getIndex()));
// Create new Dup Filter Iterator
il.append(new NEW(cpg.addClass(DUP_FILTERED_ITERATOR)));
il.append(DUP);
il.append(new ALOAD(pathTemp.getIndex()));
// Initialize Dup Filter Iterator with iterator from the stack
il.append(new INVOKESPECIAL(initDFI));
}
else {
final int git = cpg.addInterfaceMethodref(DOM_INTF,
"getIterator",
"()"+NODE_ITERATOR_SIG);
il.append(methodGen.loadDOM());
il.append(new INVOKEINTERFACE(git, 1));
}
