JAXB (Java Architecture for XML Binding) is an API that allows conversion between Java objects and XML documents. It includes tools for: - Marshalling, which converts Java objects to XML - Unmarshalling, which converts XML to Java objects The JAXB implementation includes a schema compiler that binds an XML schema to generated Java classes. It also includes a binding runtime framework for marshalling and unmarshalling XML data using the generated classes. The typical process involves generating classes from an XML schema, compiling the classes, unmarshalling an XML document to a Java content tree using the classes, processing the tree, then marshalling it back to XML.

1. JAXB
Java Architecture xml binding
Presented By
Kiran Gajbhiye
Comp Dept | gcoej

2. Introduction
• JAXB(Java Architecture for XML Binding)
• It is used to convert XML to java object and java object to XML
• JAXB is an API that gives us the power to read and write Java Objects
to and from XML documents.
• Marshalling – Convert a Java object into a XML file
• Unmarshalling – Convert XML content into a Java Object

3. JAXB Architecture

4. Implementation
• A JAXB implementation consists of the following architectural components:
 schema compiler: binds a source schema to a set of schema derived program
elements. The binding is described by an XML-based binding language.
 schema generator: maps a set of existing program elements to a derived
schema. The mapping is described by program annotations.
 binding runtime framework: provides unmarshalling (reading) and
marshalling (writing) operations for accessing, manipulating and validating
XML content using either schema-derived or existing program elements.

5. Steps in JAXB binding process
1. Generate classes. An XML schema is used as input to the JAXB binding compiler to generate
JAXB classes based on that schema.
2. Compile classes
3. Unmarshal. XML documents written according to the constraints in the source schema are
unmarshalled by the JAXB binding framework
4. Generate content tree The unmarshalling process generates a content tree of data objects
instantiated from the generated JAXB classes
5. Validate (optional). The unmarshalling process optionally involves validation of the source
XML documents before generating the content tree.
6. Process content. The client application can modify the XML data represented by the Java
content tree by means of interfaces generated by the binding compiler.
7. Marshal. The processed content tree is marshalled out to one or more XML output documents.
The content may be validated before marshalling.

6. JAXB Architecture(cont’d)

7. Features of JAXB 2.0
• Annotation support: JAXB 2.0 provides support to annotation so less coding is required to develop
JAXB application. The javax.xml.bind.annotation package provides classes and interfaces for JAXB 2.0
• Support for all W3C XML Schema features: it supports all the W3C schema unlike JAXB 1.0
• Additional Validation Capabilities: it provides additional validation support by JAXP 1.3
validation API.
• Small Runtime Library: it required small runtime library that JAXB 1.0
• Reduction of generated schema-derived classes: it reduces a lot of generated schema-derived
classes

8. Thank you !!