XmlValue (Java EE 5 SDK)

javax.xml.bind.annotation Annotation Type XmlValue

@Retention(value=RUNTIME)
@Target(value={FIELD,METHOD})
public @interface XmlValue

Enables mapping a class to a XML Schema complex type with a simpleContent or a XML Schema simple type.

Usage:

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

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

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

• At most one field or property can be annotated with the @XmlValue annotation.
• @XmlValue can be used with the following annotations: XmlList. However this is redundant since XmlList maps a type to a simple schema type that derives by list just as XmlValue would.
• If the type of the field or property is a collection type, then the collection item type must map to a simple schema type.
• If the type of the field or property is not a collection type, then the type must map to a XML Schema simple type.

If the annotated JavaBean property is the sole class member being mapped to XML Schema construct, then the class is mapped to a simple type. If there are additional JavaBean properties (other than the JavaBean property annotated with @XmlValue annotation) that are mapped to XML attributes, then the class is mapped to a complex type with simpleContent.

Example 1: Map a class to XML Schema simpleType

 
     // Example 1: Code fragment
     public class USPrice {
         @XmlValue
         public java.math.BigDecimal price;
     }
  
     <!-- Example 1: XML Schema fragment -->
     <xs:simpleType name="USPrice">
       <xs:restriction base="xs:decimal"/>
     </xs:simpleType>

   

Example 2: Map a class to XML Schema complexType with with simpleContent.

   // Example 2: Code fragment
   public class InternationalPrice {
       @XmlValue
       public java.math.BigDecimal price;
 
       @XmlAttribute
       public String currency;
   }
  
   <!-- Example 2: XML Schema fragment -->
   <xs:complexType name="InternationalPrice">
     <xs:simpleContent>
       <xs:extension base="xs:decimal">
         <xs:attribute name="currency" type="xs:string"/>
       </xs:extension>
     </xs:simpleContent>
   </xs:complexType> 

   

从以下版本开始:

JAXB2.0

版本:

$Revision: 1.6 $

作者:

Sekhar Vajjhala, Sun Microsystems, Inc.

另请参见:

XmlType

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