Annotation Type XmlElementWrapper


  • @Retention(RUNTIME)
    @Target({FIELD,METHOD})
    public @interface XmlElementWrapper
    Generates a wrapper element around XML representation. This is primarily intended to be used to produce a wrapper XML element around collections. The annotation therefore supports two forms of serialization shown below.
    
        //Example: code fragment
          int[] names;
    
        // XML Serialization Form 1 (Unwrapped collection)
        <names> ... </names>
        <names> ... </names>
    
        // XML Serialization Form 2 ( Wrapped collection )
        <wrapperElement>
           <names> value-of-item </names>
           <names> value-of-item </names>
           ....
        </wrapperElement>
     

    The two serialized XML forms allow a null collection to be represented either by absence or presence of an element with a nillable attribute.

    Usage

    The @XmlElementWrapper annotation can be used with the following program elements:

    • JavaBean property
    • non static, non transient field

    The usage is subject to the following constraints:

    See "Package Specification" in javax.xml.bind.package javadoc for additional common information.

    Since:
    1.6, JAXB 2.0
    See Also:
    XmlElement, XmlElements, XmlElementRef, XmlElementRefs
    • Optional Element Summary

      Optional Elements 
      Modifier and Type Optional Element Description
      String name
      Name of the XML wrapper element.
      String namespace
      XML target namespace of the XML wrapper element.
      boolean nillable
      If true, the absence of the collection is represented by using xsi:nil='true'.
      boolean required
      Customize the wrapper element declaration to be required.
    • Element Detail

      • name

        String name
        Name of the XML wrapper element. By default, the XML wrapper element name is derived from the JavaBean property name.
        Default:
        "##default"
      • namespace

        String namespace
        XML target namespace of the XML wrapper element.

        If the value is "##default", then the namespace is determined as follows:

        1. If the enclosing package has XmlSchema annotation, and its elementFormDefault is QUALIFIED, then the namespace of the enclosing class.
        2. Otherwise "" (which produces unqualified element in the default namespace.
        Default:
        "##default"
      • nillable

        boolean nillable
        If true, the absence of the collection is represented by using xsi:nil='true'. Otherwise, it is represented by the absence of the element.
        Default:
        false
      • required

        boolean required
        Customize the wrapper element declaration to be required.

        If required() is true, then the corresponding generated XML schema element declaration will have minOccurs="1", to indicate that the wrapper element is always expected.

        Note that this only affects the schema generation, and not the unmarshalling or marshalling capability. This is simply a mechanism to let users express their application constraints better.

        Since:
        1.6, JAXB 2.1
        Default:
        false