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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
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* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
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*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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package javax.xml.bind.annotation;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;
import static java.lang.annotation.RetentionPolicy.RUNTIME;
import static java.lang.annotation.ElementType.TYPE;
/**
* Maps a class or an enum type to an XML element.
*
* <p> <b>Usage</b> </p>
* <p>
* The &#64;XmlRootElement annotation can be used with the following program
* elements:
* <ul>
* <li> a top level class </li>
* <li> an enum type </li>
* </ul>
*
* <p>See "Package Specification" in javax.xml.bind.package javadoc for
* additional common information.</p>
*
* <p>
* When a top level class or an enum type is annotated with the
* &#64;XmlRootElement annotation, then its value is represented
* as XML element in an XML document.
*
* <p> This annotation can be used with the following annotations:
* {@link XmlType}, {@link XmlEnum}, {@link XmlAccessorType},
* {@link XmlAccessorOrder}.
* <p>
* <p>
* <b>Example 1: </b> Associate an element with XML Schema type
* <pre>
* // Example: Code fragment
* &#64;XmlRootElement
* class Point {
* int x;
* int y;
* Point(int _x,int _y) {x=_x;y=_y;}
* }
* </pre>
*
* <pre>
* //Example: Code fragment corresponding to XML output
* marshal( new Point(3,5), System.out);
* </pre>
*
* <pre>
* &lt;!-- Example: XML output -->
* &lt;point>
* &lt;x> 3 </x>
* &lt;y> 5 </y>
* &lt;/point>
* </pre>
*
* The annotation causes an global element declaration to be produced
* in the schema. The global element declaration is associated with
* the XML schema type to which the class is mapped.
*
* <pre>
* &lt;!-- Example: XML schema definition -->
* &lt;xs:element name="point" type="point"/>
* &lt;xs:complexType name="point">
* &lt;xs:sequence>
* &lt;xs:element name="x" type="xs:int"/>
* &lt;xs:element name="y" type="xs:int"/>
* &lt;/xs:sequence>
* &lt;/xs:complexType>
* </pre>
*
* <p>
*
* <b>Example 2: Orthogonality to type inheritance </b>
*
* <p>
* An element declaration annotated on a type is not inherited by its
* derived types. The following example shows this.
* <pre>
* // Example: Code fragment
* &#64;XmlRootElement
* class Point3D extends Point {
* int z;
* Point3D(int _x,int _y,int _z) {super(_x,_y);z=_z;}
* }
*
* //Example: Code fragment corresponding to XML output *
* marshal( new Point3D(3,5,0), System.out );
*
* &lt;!-- Example: XML output -->
* &lt;!-- The element name is point3D not point -->
* &lt;point3D>
* &lt;x>3&lt;/x>
* &lt;y>5&lt;/y>
* &lt;z>0&lt;/z>
* &lt;/point3D>
*
* &lt;!-- Example: XML schema definition -->
* &lt;xs:element name="point3D" type="point3D"/>
* &lt;xs:complexType name="point3D">
* &lt;xs:complexContent>
* &lt;xs:extension base="point">
* &lt;xs:sequence>
* &lt;xs:element name="z" type="xs:int"/>
* &lt;/xs:sequence>
* &lt;/xs:extension>
* &lt;/xs:complexContent>
* &lt;/xs:complexType>
* </pre>
*
* <b>Example 3: </b> Associate a global element with XML Schema type
* to which the class is mapped.
* <pre>
* //Example: Code fragment
* &#64;XmlRootElement(name="PriceElement")
* public class USPrice {
* &#64;XmlElement
* public java.math.BigDecimal price;
* }
*
* &lt;!-- Example: XML schema definition -->
* &lt;xs:element name="PriceElement" type="USPrice"/>
* &lt;xs:complexType name="USPrice">
* &lt;xs:sequence>
* &lt;xs:element name="price" type="xs:decimal"/>
* &lt;/sequence>
* &lt;/xs:complexType>
* </pre>
*
* @author Sekhar Vajjhala, Sun Microsystems, Inc.
* @since JAXB2.0
*/
@Retention(RUNTIME)
@Target({TYPE})
public @interface XmlRootElement {
/**
* namespace name of the XML element.
* <p>
* If the value is "##default", then the XML namespace name is derived
* from the package of the class ( {@link XmlSchema} ). If the
* package is unnamed, then the XML namespace is the default empty
* namespace.
*/
String namespace() default "##default";
/**
* local name of the XML element.
* <p>
* If the value is "##default", then the name is derived from the
* class name.
*
*/
String name() default "##default";
}