What is the use of @XmlRootElement?
When a top level class or an enum type is annotated with the @XmlRootElement annotation, then its value is represented as XML element in an XML document. This annotation can be used with the following annotations: XmlType, XmlEnum, XmlAccessorType , XmlAccessorOrder .
What is JAXB @XmlRootElement annotation?
Java example of JAXB @XmlRootElement annotation in detail along with its usage during marshalling and unmarshalling operations. @XmlRootElement maps a class or an enum type to an XML element. When a top level class or an enum type is annotated with the @XmlRootElement annotation, then its value is represented as XML element in an XML document.
Do I annotate the referenced POJO class with @XmlRootElement?
The referenced POJO class does not need to be annotated with @XmlRootElement. There is nothing special that you need to do to have Address marshalled as part of Employee.
What is the default namespace name of the XML element?
namespace name of the XML element. If the value is "##default", then the XML namespace name is derived from the package of the class ( XmlSchema). If the package is unnamed, then the XML namespace is the default empty namespace. Default:
What is use of @XmlElement?
A JavaBean property, when annotated with @XmlElement annotation is mapped to a local element in the XML Schema complex type to which the containing class is mapped. Example 2: Map a field to a nillable element.
What is @XmlRootElement in rest?
@XmlRootElement maps a class or an enum type to an XML element. When a top level class or an enum type is annotated with the @XmlRootElement annotation, then its value is represented as XML element in an XML document.
When should I use XmlTransient?
The @XmlTransient annotation is useful for resolving name collisions between a JavaBean property name and a field name or preventing the mapping of a field/property. A name collision can occur when the decapitalized JavaBean property name and a field name are the same.
What is the use of ObjectFactory in JAXB?
jaxb package. An ObjectFactory allows you to programatically construct new instances of the Java representation for XML content. The Java representation of XML content can consist of schema derived interfaces and classes representing the binding of schema type definitions, element declarations and model groups.
What is a root element in XML?
Each XML document has exactly one single root element. It encloses all the other elements and is therefore the sole parent element to all the other elements. ROOT elements are also called document elements. In HTML, the root element is the element.
What is XmlAccessorType?
Annotation Type XmlAccessorType Controls whether fields or Javabean properties are serialized by default. Usage. @XmlAccessorType annotation can be used with the following program elements: package. a top level class.
What is ObjectFactory in spring?
Interface ObjectFactory
What is the use of @XmlRegistry?
@XmlRegistry is used to mark a class that has @XmlElementDecl annotations. To have your JAXB implementation process this class you need to ensure that it is included in the list of classes used to bootstrap the JAXBContext .
What is JAXB context?
The JAXBContext class provides the client's entry point to the JAXB API. It provides an abstraction for managing the XML/Java binding information necessary to implement the JAXB binding framework operations: unmarshal, marshal and validate.
What is ObjectFactory in Java?
ObjectFactory provides factory methods for instantiating Java interfaces representing XML content in the Java content tree. Method names are generated by concatenating: The string constant create. If the Java content interface is nested within another interface, then the concatenation of all outer Java class names.
What is the factory of object?
In object-oriented programming (OOP), a factory is an object for creating other objects – formally a factory is a function or method that returns objects of a varying prototype or class from some method call, which is assumed to be "new".
How does the root element work in XML?
Generally, a mark-up language has the first element to be considered as a root element. In HTML <html> is a root element but in XML user-defined any tag element is a root element. Every Document should have a root element by default that is descendants with child elements and sub-child elements.
Examples
Here we have a few examples of the root elements to go with for a valid XML document.
Conclusion
This article describes how to use XmlRootElement in the java platform. This can be done using the Element Declaration. To handle multiple root elements in XSD @XmlRootElement annotation is used.
Recommended Articles
This is a guide to the XML root element. Here we discuss how to use XmlRootElement in java platform along with the examples and outputs. You may also have a look at the following articles to learn more –
