private Integer parseOperand(String operand, String line) {
Integer operandIntValue;
if (numericPattern.matcher(operand).matches()) {
operandIntValue = Integer.parseInt(operand);
} else {
operandIntValue = wiresSignals.get(operand);
if (operandIntValue == null) {
wireSignalSubject.addObserver(new WireSignalObserver(operand, line, this));
return null;
}
}
return operandIntValue;
}
