public static void pushOntoStack(OperationResourceInfo ori, MultivaluedMap<String, String> params, Message msg) { OperationResourceInfoStack stack = msg.get(OperationResourceInfoStack.class); if (stack == null) { stack = new OperationResourceInfoStack(); msg.put(OperationResourceInfoStack.class, stack); } List<String> values = null; if (params.size() <= 1) { values = Collections.emptyList(); } else { values = new ArrayList<>(params.size() - 1); addTemplateVarValues(values, params, ori.getClassResourceInfo().getURITemplate()); addTemplateVarValues(values, params, ori.getURITemplate()); } Class<?> realClass = ori.getClassResourceInfo().getServiceClass(); stack.push(new MethodInvocationInfo(ori, realClass, values)); }