Getting error when mouse hover an element - selenium-webdriver

Question

Getting error when mouse hover an element with below code in selenium:
public void our_medicines(String locatorType, String value) {
try {
By locator;
locator = locatorValue(locatorType, value);
Actions action = new Actions(driver);
WebDriverWait wait = new WebDriverWait(driver, 10);
WebElement element = wait.until(ExpectedConditions.visibilityOfElementLocated(locator));
action.moveToElement(element).click().build().perform();
} catch (Exception e) {
System.err.format("no such element to mousehover" + e);
}
}
This is my locatorValue method:
public By locatorValue(String locatorTpye, String value) {
By by;
switch (locatorTpye) {
case "id":
by = By.id(value);
break;
case "name":
by = By.name(value);
break;
case "xpath":
by = By.xpath(value);
break;
case "css":
by = By.cssSelector(value);
break;
case "linkText":
by = By.linkText(value);
break;
case "partialLinkText":
by = By.partialLinkText(value);
break;
case "className":
by = By.className(value);
break;
default:
by = null;
break;
}
return by;
}

Answer 1

Okay so the problem I found with your locatorValue method was that it could not handle unspecified locators in this block
default: by = null;
break;
}
return by; }
I added something simple just to deal with that, but you can tune it however you want
default: throw new Exception("Locator type not defined");
}
return by; }
Make sure the locatorType parameter being passed to public void our_medicinesis a valid Locator type.