Module jakarta.xml.bind

Package jakarta.xml.bind.annotation

Annotation Type XmlID

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

Maps a JavaBean property to XML ID.

To preserve referential integrity of an object graph across XML serialization followed by an XML deserialization, requires an object reference to be marshalled by reference or containment appropriately. Annotations @XmlID and @XmlIDREF together allow a customized mapping of a JavaBean property's type by containment or reference.

Usage

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

• a JavaBean property
• non-static, non transient field

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

The usage is subject to the following constraints:

• At most one field or property in a class can be annotated with @XmlID.
• The JavaBean property's type must be java.lang.String.
• The only other mapping annotations that can be used with @XmlID are: @XmlElement and @XmlAttribute.

Example: Map a JavaBean property's type to xs:ID

 // Example: code fragment
 public class Customer {
     @XmlAttribute
     @XmlID
     public String getCustomerID();
     public void setCustomerID(String id);
     .... other properties not shown
 }

 <!-- Example: XML Schema fragment -->
 <xs:complexType name="Customer">
   <xs:complexContent>
     <xs:sequence>
       ....
     </xs:sequence>
     <xs:attribute name="customerID" type="xs:ID"/>
   </xs:complexContent>
 </xs:complexType>

Author:

Sekhar Vajjhala, Sun Microsystems, Inc.

See Also:

• XmlIDREF