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Data Contracts

This chapter describes guidelines for  :

Designing a XML schema exposed by a web service starting from Java
Consuming a WCF service generated WSDL/XML schema when designing a Java client or Java web service
Developing a Microsoft WCF client

A WSIT client/service uses JAXB 2.0 for XML serialization, generating XML schemas from Java classes and generating Java classes from XML schemas. A WCF client/service uses either XmlSerializer or DataContractSerializer for like tasks. JAXB 2.0 and the WCF XML serialization mechanisms differ in two fundamental ways. First, JAXB 2.0 supports all of XML schema. .NET's DataContractSerializer and XmlSerializer support different XML schema sets. Second, WCF's XMLSerializer/DataContractSerializer and JAXB 2.0 differ in their mapping of programming language datatypes to XML Schema constructs. As a result, a XML schema generated from a programming language on one platform and consumed on another platform may result in less than developer-friendly bindings. This chapter discusses some of the common databinding differences between the two systems and recommends ways to address them.

All of the material in The WSIT Tutorial is copyright-protected and may not be published in other works without express written permission from Sun Microsystems.