CODEWITHSUNDEEP
java
ave4496
ave4496

Reputation: 3018

How to handle NestedNullException (extends RuntimeException)

I want to get a property via string like:

PropertyUtils.getNestedProperty(object, propertyName);

For example I have Person object and I want to get the name of the father...

PropertyUtils.getNestedProperty(person, "father.firstName");

Now maybe the person doesn't have a father so the object is null and I get a org.apache.commons.beanutils.NestedNullException.

Is it ok to catch this exception (since it is a runtime exception) or should I first find out if the father is null? Or are there other workarounds?

Upvotes: 0

Views: 2261

Answers (1)

Wilson
Wilson

Reputation: 11619

If you expect a null return instead of NestedNullException if the nested property is null, you can create your own static method that wraps the PropertyUtils.getNestedProperty and catches NestedNullException to return null:

public static Object getNestedPropertyIfExists(Object bean, String name) {
    try {
        return PropertyUtils.getNestedProperty(bean, name);
    } catch (NestedNullException e) {
      // Do nothing
    }
    return null;
}

Upvotes: 3

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