public static ProductMessage getProductMessage(
List<Message> messages, Product product, Language language) {
if (messages == null) throw new IllegalArgumentException("Message list was null");
ProductMessage productMessage =
messages
.stream()
.filter(
msg -> {
if (msg instanceof ProductMessage) {
ProductMessage msg1 = (ProductMessage) msg;
return msg1.getProduct().equals(product) && msg1.getLanguage().equals(language);
} else {
return false;
}
})
.findAny()
.map(msg -> (ProductMessage) msg)
.get();
if (productMessage == null) {
throw new IllegalArgumentException(
String.format("ProductMessage missing: %s, %s", product, language));
}
return productMessage;
}
