javax.xml.bind

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1. Unmarshalling XML Data to Java Objects

// Create UnmarshalContext
JAXBContext jaxbContext = JAXBContext.newInstance(Customer.class);

// Create Unmarshaller
Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();

// Unmarshall XML file
File xmlFile = new File("customer.xml");
Customer customer = (Customer) unmarshaller.unmarshal(xmlFile);

2. Marshalling Java Objects to XML Data

// Create MarshalContext
JAXBContext jaxbContext = JAXBContext.newInstance(Customer.class);

// Create Marshaller
Marshaller marshaller = jaxbContext.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);

// Marshal Java object to XML file
File xmlFile = new File("customer.xml");
marshaller.marshal(customer, xmlFile);

3. Binding XML Schemas to Java Classes

// Create SchemaFactory
SchemaFactory schemaFactory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);

// Create Schema from XML schema file
Source schemaSource = new StreamSource(file);
Schema schema = schemaFactory.newSchema(schemaSource);

// Bind XML schema to annotated Java class
JAXBContext jaxbContext = JAXBContext.newInstance(Customer.class);
jaxbContext.setSchema(schema);

4. Validating XML Data Using Schemas

// Create Validator
Validator validator = schema.newValidator();

// Load XML file
Source xmlSource = new StreamSource(file);

// Validate XML data against schema
Result result = validator.validate(xmlSource);

5. Customizing XML Mapping with JAXB Annotations

// JAXB Annotations
@XmlRootElement
public class Customer {
    @XmlElement
    private String name;
    // Other annotations and methods...
}

6. Using JAXBAdapters for Custom Data Types

// JAXB Adapter for LocalDate
public class LocalDateAdapter extends XmlAdapter<String, LocalDate> {
    @Override
    public LocalDate unmarshal(String value) { return LocalDate.parse(value); }
    @Override
    public String marshal(LocalDate value) { return value.toString(); }
}

7. Handling Unknown XML Elements

// Customize unmarshaller to handle unknown elements
Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
unmarshaller.setEventHandler(new DefaultValidationEventHandler());

8. Filtering XML Data with JAXB Filters

// Create filter
Filter filter = new JAXBElementFilter();

// Use filter during unmarshalling
Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
unmarshaller.setXMLFilter(filter);

9. Marshalling XML Data to Strings

// Marshall object to String
Marshaller marshaller = jaxbContext.createMarshaller();
StringWriter writer = new StringWriter();
marshaller.marshal(customer, writer);
String xmlString = writer.toString();

10. Unmarshalling XML Data from Strings

// Unmarshall XML string to object
Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
StringReader reader = new StringReader(xmlString);
Customer customer = (Customer) unmarshaller.unmarshal(reader);

11. Handling Null Values in XML Data

// Customize marshaller to handle null values
Marshaller marshaller = jaxbContext.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_ENCODING, "UTF-8");
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
marshaller.setProperty(Marshaller.JAXB_NO_NAMESPACE_SCHEMA_LOCATION, "schema.xsd");

12. Using JAXBProperties for Customization

// Create JAXBProperties object
JAXBProperties properties = new JAXBProperties(schemaSource);

// Customize unmarshaller
Unmarshaller unmarshaller = jaxbContext.createUnmarshaller(properties);

13. Handling XML Namespaces

// Change default namespace of annotated Java class
@XmlRootElement(namespace = "http://example.com/customer")
public class Customer { // ... }

14. Generating XML Data with Specific Encoding

// Customize marshaller to use specific encoding
Marshaller marshaller = jaxbContext.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_ENCODING, "UTF-8");

15. Unmarshalling XML Data with Specific Locale

// Customize unmarshaller to use specific locale
Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
unmarshaller.setProperty(Unmarshaller.JAXB_LOCALE, Locale.FRENCH);

16. Handling XML Attributes

// JAXB Annotations for XML attributes
@XmlElement(name = "name", attribute = true)
public class Customer { // ... }

17. Customizing XML Element Order

// JAXB Annotations for XML element order
@XmlElement(nillable = true, required = true, order = 1)
public class Customer { // ... }

18. Binding XML to Java Interfaces

// JAXB interface binding
@XmlRootElement
public interface Customer {
    String getName();
    void setName(String name);
}

19. Using JAXB to Bind XML to POJOs (Plain Old Java Objects)

// JAXB annotations on POJO
@XmlRootElement
public class Customer {
    private String name;
    private Integer age;
    // ... }

20. Mapping XML to Java Collections

// JAXB Annotations for XML collections
@XmlElementWrapper(name = "orders")
@XmlElement(name = "order")
public class Customer {
    private List<Order> orders;
    // ... }

21. Marshalling XML Data with Indentation

// Customize marshaller to indent output
Marshaller marshaller = jaxbContext.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);

22. Unmarshalling XML Data with No Validation

// Customize unmarshaller to skip validation
Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
unmarshaller.setEventHandler(new SkipValidationEventHandler());

23. Handling XML Annotations

// JAXB annotations on XML
@XmlAccessorType(XmlAccessType.FIELD)
public class Customer {
    @XmlElement(name = "name")
    private String name;
    // ... }

24. Serializing XML Data to a File

// Serialize object to XML file
File outputFile = new File("output.xml");
try {
    marshaller.marshal(customer, outputFile);
} catch (JAXBException e) {
    e.printStackTrace();
}

25. Deserializing XML Data from a File

// Deserialize XML file to object
File inputFile = new File("input.xml");
try {
    Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
    Customer customer = (Customer) unmarshaller.unmarshal(inputFile);
} catch (JAXBException e) {
    e.printStackTrace();
}

26. JAXB Mapping for XML with Namespaces

// JAXB Annotation for XML namespace
@XmlRootElement(namespace = "http://www.example.com/customer")
public class Customer { // ... }

27. JAXB Mapping for XML with Specific Prefix

// JAXB Annotation for XML element with specific prefix
@XmlElement(namespace = "http://www.example.com/customer", name = "name")
public class Customer { // ... }

28. JAXB Mapping for XML with Optional Elements

// JAXB Annotation for optional XML element
@XmlElement(required = false)
public class Customer { // ... }

29. JAXB Mapping for XML with Default Values

// JAXB Annotation for XML element with default value
@XmlElement(defaultValue = "John Doe")
public class Customer { // ... }

30. JAXB Mapping for XML with Choice Elements

// JAXB Annotation for XML element with choice
@XmlElement(choice = { @XmlElement(name = "name"), @XmlElement(name = "email") })
public class Customer { // ... }

31. JAXB Mapping for XML with Inline Elements

// JAXB Annotation for XML inline element
@XmlInlineBinaryData
public class Customer { // ... }

32. JAXB Binding for XML with Mix Annotations

// JAXB Annotation for XML element with mixed content
@XmlElementWrapper(name = "items")
@XmlElement(name = "item")
@XmlMixed
public class Customer { // ... }

33. JAXB Mapping for XML with Adaptations

// JAXB Adapter class for custom type adaptation
public class MyDateAdapter extends XmlAdapter<String, Date> { // ... }

34. JAXB Binding for XML with Object Factory

// JAXB ObjectFactory class for creating XML objects
public class CustomerFactory { // ... }

35. JAXB Mapping for XML with Wrappers

// JAXB Wrapper class for XML root element
@XmlRootElement(name = "Customers")
public class CustomerList { // ... }

36. JAXB Customization for XML with NamespacePrefixMapper

// JAXB NamespacePrefixMapper class for customizing XML namespace prefixes
public class MyNamespacePrefixMapper extends NamespacePrefixMapper { // ... }

37. JAXB Customization for XML with SchemaLocation

// JAXB SchemaLocation class for specifying XML schema location
public class MySchemaLocation extends SchemaLocation { // ... }

38. JAXB Customization for XML with ValidationEventHandlers

// JAXB ValidationEventHandler class for handling XML validation events
public class MyValidationEventHandler extends ValidationEventHandler { // ... }

39. JAXB Customization for XML with MarshallerProperties

// JAXB MarshallerProperties class for customizing XML marshaling properties
public class MyMarshallerProperties extends MarshallerProperties { // ... }

40. JAXB Customization for XML with UnmarshallerProperties

// JAXB UnmarshallerProperties class for customizing XML unmarshaling properties
public class MyUnmarshallerProperties extends UnmarshallerProperties { // ... }

41. JAXB Customization for XML with MOXy (EclipseLink)

// JAXBContextFactory for using MOXy with JAXB
JAXBContextFactory factory = EclipseLinkMOXy.JAXBContextFactory.getInstance();
// ... (use factory to create JAXBContext and customize as needed)

42. JAXB Customization for XML with XJC (JAXB Compiler)

// XJC command for generating Java classes from XML schema with customizations
xjc -d outputDirectory -encoding UTF-8 -target 2.0 -p com.example schema.xsd

43. JAXB Binding for XML with Validation Mode

// Customize JAXBContext with validation mode
JAXBContext jaxbContext = JAXBContext.newInstance(Customer.class, new MyValidationEventHandler(), SchemaValidation.RELAXED);

44. JAXB Binding for XML with Schema Generation

// Generate XSD schema from Java classes
SchemaOutputResolver outputResolver = new MySchemaOutputResolver();
XJC xjc = JAXBContext.newInstance(Customer.class).createJAXBContext(outputResolver);
xjc.generateSchema(outputResolver.createOutput());

45. JAXB Binding for XML with Binding Source

// Create JAXBContext from XML Binding Source
JAXBContext jaxbContext = JAXBContext.newInstance(new XMLBindingSource(customer));

46. JAXB Binding for XML with XML Schema Binding

// Bind XML schema to Java classes with XML Schema Binding
JAXBContext jaxbContext = JAXBContext.newInstance(Customer.class, Customer.class.getResource(schema).toString());

47. JAXB Customization for XML with Optimized Marshalling

// Initialize JAXB Marshaller for optimized performance
Marshaller marshaller = jaxbContext.createMarshaller();
marshaller.setEventHandler(new Marshaller.EventHandler() { // ... });
marshaller.setProperty(Marshaller.JAXB_FRAGMENT, true);
marshaller.setProperty(Marshaller.JAXB_ENCODING, "UTF-8");

48. JAXB Customization for XML with Optimized Unmarshalling

// Initialize JAXB Unmarshaller for optimized performance
Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
unmarshaller.setEventHandler(new Unmarshaller.EventHandler() { // ... });
unmarshaller.setProperty(Unmarshaller.JAXB_FRAGMENT, true);
unmarshaller.setProperty(Unmarshaller.JAXB_ENCODING, "UTF-8");

49. JAXB Customization for XML with Security Features

// Initialize JAXBContext with security manager
SecurityManager securityManager = new MySecurityManager();
JAXBContext jaxbContext = JAXBContext.newInstance(Customer.class, null, securityManager);

50. JAXB Binding for XML with CXF (Apache CXF)

// Use CXF to create SOAP message with JAXB-bound data
SOAPMessage message = SOAPFactory.newInstance().createMessage();
message.getSOAPBody().addBodyElement(jaxbContext.createMarshaller().marshal(customer));