Method getCreditRating: The following parameter types do not have an XML Schema mapping and/or seralizer specified:

I was getting the following error message when trying to create web service from this URL

Error Message:
Method getCreditRating: The following parameter types do not have an XML Schema mapping and/or seralizer specified:

java.lang.Object

Solution :
The java.io.Serializable marker is not consulted when determining whether a Java object can be transmitted in a web service invocation. Instead, each parameter and return value of a web service method must conform to one of the 3 rules below:

1. It is a Java primitive (int, long, byte etc.), Java primitive wrapper (java.lang.Integer etc.), or a java.lang.String.
2. It is a Java bean with a zero-argument constructor, and a pair of “get” and “set” methods for each property to be exposed. Each property must itself conform to one of these 3 rules.
3. It is an array of a type that meets either rule 1 or rule 2.