Annotation Interface XmlMixed


@Retention(RUNTIME) @Target({FIELD,METHOD}) public @interface XmlMixed

Annotate a JavaBean multi-valued property to support mixed content.

The usage is subject to the following constraints:

  • can be used with @XmlElementRef, @XmlElementRefs or @XmlAnyElement

The following can be inserted into @XmlMixed annotated multi-valued property

  • XML text information items are added as values of java.lang.String.
  • Children element information items are added as instances of JAXBElement or instances with a class that is annotated with @XmlRootElement.
  • Unknown content that is not be bound to a Jakarta XML Binding mapped class is inserted as Element. (Assumes property annotated with @XmlAnyElement)

Below is an example of binding and creation of mixed content.

  <!-- schema fragment having  mixed content -->
  <xs:complexType name="letterBody" mixed="true">
    <xs:sequence>
      <xs:element name="name" type="xs:string"/>
      <xs:element name="quantity" type="xs:positiveInteger"/>
      <xs:element name="productName" type="xs:string"/>
      <!-- etc. -->
    </xs:sequence>
  </xs:complexType>
  <xs:element name="letterBody" type="letterBody"/>
  // Schema-derived Java code:
  // (Only annotations relevant to mixed content are shown below,
  //  others are omitted.)
  import java.math.BigInteger;
  public class ObjectFactory {
      // element instance factories
      JAXBElement<LetterBody> createLetterBody(LetterBody value);
      JAXBElement<String>     createLetterBodyName(String value);
      JAXBElement<BigInteger> createLetterBodyQuantity(BigInteger value);
      JAXBElement<String>     createLetterBodyProductName(String value);
      // type instance factory
      LetterBody createLetterBody();
  }
  public class LetterBody {
      // Mixed content can contain instances of Element classes
      // Name, Quantity and ProductName. Text data is represented as
      // java.util.String for text.
      @XmlMixed
      @XmlElementRefs({
         @XmlElementRef(name="productName", type=JAXBElement.class)
         @XmlElementRef(name="quantity", type=JAXBElement.class)
         @XmlElementRef(name="name", type=JAXBElement.class)
      })
      List getContent() {...}
  }
The following is an XML instance document with mixed content
  <letterBody>
    Dear Mr.<name>Robert Smith</name>
    Your order of <quantity>1</quantity> <productName>Baby
    Monitor</productName> shipped from our warehouse. ....
  </letterBody>
that can be constructed using following Jakarta XML Binding API calls.
  LetterBody lb = ObjectFactory.createLetterBody();
  JAXBElement<LetterBody> lbe = ObjectFactory.createLetterBody(lb);
  List gcl = lb.getContent();  //add mixed content to general content property.
  gcl.add("Dear Mr.");  // add text information item as a String.

  // add child element information item
  gcl.add(ObjectFactory.createLetterBodyName("Robert Smith"));
  gcl.add("Your order of "); // add text information item as a String

  // add children element information items
  gcl.add(ObjectFactory.createLetterBodyQuantity(new BigInteger("1")));
  gcl.add(ObjectFactory.createLetterBodyProductName("Baby Monitor"));
  gcl.add("shipped from our warehouse");  // add text information item

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