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package javax.xml.bind.annotation;
import java.lang.annotation.Target;
import java.lang.annotation.Retention;
import static java.lang.annotation.ElementType.*;
import static java.lang.annotation.RetentionPolicy.*;
/**
* <p>
* Enables mapping a class to a XML Schema complex type with a
* simpleContent or a XML Schema simple type.
* </p>
*
* <p>
* <b> Usage: </b>
* <p>
* The <tt>@XmlValue</tt> annotation can be used with the following program
* elements:
* <ul>
* <li> a JavaBean property.</li>
* <li> non static, non transient field.</li>
* </ul>
*
* <p>See "Package Specification" in javax.xml.bind.package javadoc for
* additional common information.</p>
*
* The usage is subject to the following usage constraints:
* <ul>
* <li>At most one field or property can be annotated with the
* <tt>@XmlValue</tt> annotation. </li>
*
* <li><tt>@XmlValue</tt> can be used with the following
* annotations: {@link XmlList}. However this is redundant since
* {@link XmlList} maps a type to a simple schema type that derives by
* list just as {@link XmlValue} would. </li>
*
* <li>If the type of the field or property is a collection type,
* then the collection item type must map to a simple schema
* type. </li>
*
* <li>If the type of the field or property is not a collection
* type, then the type must map to a XML Schema simple type. </li>
*
* </ul>
* </p>
* <p>
* 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 <tt>@XmlValue</tt> annotation)
* that are mapped to XML attributes, then the class is mapped to a
* complex type with simpleContent.
* </p>
*
* <p> <b> Example 1: </b> Map a class to XML Schema simpleType</p>
*
* <pre>
*
* // 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>
*
* </pre>
*
* <p><b> Example 2: </b> Map a class to XML Schema complexType with
* with simpleContent.</p>
*
* <pre>
*
* // 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>
*
* </pre>
* </p>
*
* @author Sekhar Vajjhala, Sun Microsystems, Inc.
* @see XmlType
* @since JAXB2.0
*/
@Retention(RUNTIME) @Target({FIELD, METHOD})
public @interface XmlValue {}
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