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Junior — Middle

Which predefined exception type should be used if the passed object is not suitable for validation inside a service?

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Answer from AI

In Java, if the object passed is not suitable for validation within a service (for example, it has the wrong type or an incorrect state), the IllegalArgumentException is usually used. This is a standard predefined exception that indicates that a method has received an invalid or inappropriate argument.

Example of usage:

public void process(Object obj) {
    if (obj == null || !(obj instanceof ExpectedType)) {
        throw new IllegalArgumentException("Invalid type or argument value");
    }
    // further processing
}

This exception helps explicitly indicate that the error is related to incorrect input data.