final ConstantPoolGen cpg = classGen.getConstantPool();
final InstructionList il = methodGen.getInstructionList();
if (_path != null) {
final int initAI = cpg.addMethodref(ABSOLUTE_ITERATOR,
"<init>",
"("
+ NODE_ITERATOR_SIG
+ ")V");
// Compile relative path iterator(s)
//
// 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
// this argument to its constructor. Instead we calculate the
// value of the argument to the constructor first, store it in
// a temporary variable, create the object and reload the argument
// from the temporary to avoid the problem.
_path.translate(classGen, methodGen);
LocalVariableGen relPathIterator
= methodGen.addLocalVariable("abs_location_path_tmp",
Util.getJCRefType(NODE_ITERATOR_SIG),
il.getEnd(), null);
il.append(new ASTORE(relPathIterator.getIndex()));
// Create new AbsoluteIterator
il.append(new NEW(cpg.addClass(ABSOLUTE_ITERATOR)));
il.append(DUP);
il.append(new ALOAD(relPathIterator.getIndex()));
// Initialize AbsoluteIterator with iterator from the stack
il.append(new INVOKESPECIAL(initAI));
}
else {
final int gitr = cpg.addInterfaceMethodref(DOM_INTF,
"getIterator",
"()"+NODE_ITERATOR_SIG);
il.append(methodGen.loadDOM());
il.append(new INVOKEINTERFACE(gitr, 1));
}
