In this article, we will explore the topic of Jakarta XML Binding from various perspectives, in order to offer a complete and detailed vision of this topic that is so relevant today. We will analyze its origins, the current related trends, the different approaches that exist in this regard and its impact on society. The practical and theoretical implications of Jakarta XML Binding will also be examined, as well as its relevance in different areas, from politics to popular culture. Through in-depth analysis, we hope to provide our readers with a deeper and more nuanced understanding of Jakarta XML Binding, and encourage constructive dialogue around this topic.
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Jakarta XML Binding (JAXB; formerly Java Architecture for XML Binding) is a software framework that allows Java EE developers to map Java classes to XML representations. JAXB provides two main features: the ability to marshal Java objects into XML and the inverse, i.e. to unmarshal XML back into Java objects. In other words, JAXB allows storing and retrieving data in memory in any XML format, without the need to implement a specific set of XML loading and saving routines for the program's class structure. It is similar to xsd.exe
and XmlSerializer
in the .NET Framework.
JAXB is particularly useful when the specification is complex and changing. In such a case, regularly changing the XML Schema definitions to keep them synchronised with the Java definitions can be time-consuming and error-prone.
JAXB is one of the APIs in the Java EE platform (formerly Java EE), part of the Java Web Services Development Pack (JWSDP), and one of the foundations for WSIT. It was also part of the Java SE platform (in version Java SE 6–10). As of Java SE 11, JAXB was removed. For details, see JEP 320.
JAXB 1.0 was released in 2003, having been developed under the Java Community Process as JSR 31. In 2006 JAXB 2.0 was released under JSR 222 and Maintenance Release 2 released in December 2009. Reference implementations for these specifications were available under the CDDL open source license at java.net.
The tool "xjc" can be used to convert XML Schema and other schema file types (as of Java 1.6, RELAX NG, XML DTD, and WSDL are supported experimentally) to class representations. Classes are marked up using annotations from javax.xml.bind.annotation.* namespace, for example, @XmlRootElement and @XmlElement. XML list sequences are represented by attributes of type java.util.List. Marshallers and Unmarshallers are created through an instance of JAXBContext.
In addition, JAXB includes a "schemagen" tool that can essentially perform the inverse of "xjc", creating an XML Schema from a set of annotated classes.
The table below lists the mappings of XML Schema (XSD) data types to Java data types in JAXB.
java.xml.bind
; this module is marked as deprecated )xsd:element
of this type
xsd:attribute
of this type