Chapter Sending and receiving complex data structures 111 Choose the fault, in the Properties window, set its name to f01: Choose to create a new message: Enter the name for the message: Set the one and only part to a new XML element By default it should be of type xsd:string which is what you want here Create the second fault similarly Set the message name to queryInvalidQty, set the XML element to whose type is xsd:int Finally it should be like: 112 Chapter Sending and receiving complex data structures Next, create the binding for the two faults Choose the binding and click "Generate Binding Content" in the Properties window: Choose it It represents the binding Click here Check "Overwrite existing binding information" and then click "Finish": Chapter Sending and receiving complex data structures 113 This will generate the binding portion: Finally go into the schema index to delete the unused elements created by Eclipse: 114 Chapter Sending and receiving complex data structures They were created when you added the faults Similarly, choose "Window | Show View | Outline" to show the outline of the WSDL file as shown below Right click and delete the unused messages such as query_faultMsg and query_faultMsg1: Now, generate the service and client stubs and refresh the files in Eclipse You will find some new Java classes: Chapter Sending and receiving complex data structures class QueryInvalidProductId extends Exception { InvalidProductId faultMessage; } class InvalidProductId { String invalidProductId; } 115 A fault message is mapped to a Java exception Its one and only part (an XML element) is mapped to a field As usual, an XML element such as the element is mapped to a Java class It wanted to extend String, but String is a final class So the string is mapped to a field class QueryInvalidQty extends Exception { InvalidQty faultMessage; } class InvalidQty { int invalidQty; } The method signature in BizServiceSkeletonInterface has also been updated to throw such exceptions: public interface BizServiceSkeletonInterface { public ProductQueryResult query(ProductQuery productQuery) throws QueryInvalidProductId, QueryInvalidQty; } Now modify your implementation code: public class BizServiceImpl implements BizServiceSkeletonInterface { public ProductQueryResult query(ProductQuery productQuery) throws QueryInvalidProductId, QueryInvalidQty { ProductQueryResult result = new ProductQueryResult(); QueryItemType[] queryItems = productQuery.getQueryItem(); for (int i = 0; i < queryItems.length; i++) { QueryItemType queryItem = queryItems[i]; if (!queryItem.getProductId().startsWith("p")) { QueryInvalidProductId fault = new QueryInvalidProductId(); InvalidProductId part = new InvalidProductId(); part.setInvalidProductId(queryItem.getProductId()); fault.setFaultMessage(part); throw fault; } if (queryItem.getQty()