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* Copyright (c) 2004, 2015, Oracle and/or its affiliates. All rights reserved.
* 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
* by Oracle in the LICENSE file that accompanied this code.
*
* 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).
*
* You should have received a copy of the GNU General Public License version
* 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.FIELD;
/**
* Maps an enum constant in {@link Enum} type to XML representation.
*
* <p> <b>Usage</b> </p>
*
* <p> The {@code @XmlEnumValue} annotation can be used with the
* following program elements:
* <ul>
* <li>enum constant</li>
* </ul>
*
* <p>See "Package Specification" in javax.xml.bind.package javadoc for
* additional common information.</p>
*
* <p>This annotation, together with {@link XmlEnum} provides a
* mapping of enum type to XML representation.
*
* <p>An enum type is mapped to a schema simple type with enumeration
* facets. The schema type is derived from the Java type specified in
* {@code @XmlEnum.value()}. Each enum constant {@code @XmlEnumValue}
* must have a valid lexical representation for the type
* {@code @XmlEnum.value()}
*
* <p> In the absence of this annotation, {@link Enum#name()} is used
* as the XML representation.
*
* <p> <b>Example 1: </b>Map enum constant name {@literal ->} enumeration facet</p>
* <pre>
* //Example: Code fragment
* @XmlEnum(String.class)
* public enum Card { CLUBS, DIAMONDS, HEARTS, SPADES }
* {@code
*
* <!-- Example: XML Schema fragment -->
* <xs:simpleType name="Card">
* <xs:restriction base="xs:string"/>
* <xs:enumeration value="CLUBS"/>
* <xs:enumeration value="DIAMONDS"/>
* <xs:enumeration value="HEARTS"/>
* <xs:enumeration value="SPADES"/>
* </xs:simpleType>
* }</pre>
*
* <p><b>Example 2: </b>Map enum constant name(value) {@literal ->} enumeration facet </p>
* <pre>
* //Example: code fragment
* @XmlType
* @XmlEnum(Integer.class)
* public enum Coin {
* @XmlEnumValue("1") PENNY(1),
* @XmlEnumValue("5") NICKEL(5),
* @XmlEnumValue("10") DIME(10),
* @XmlEnumValue("25") QUARTER(25) }
* {@code
*
* <!-- Example: XML Schema fragment -->
* <xs:simpleType name="Coin">
* <xs:restriction base="xs:int">
* <xs:enumeration value="1"/>
* <xs:enumeration value="5"/>
* <xs:enumeration value="10"/>
* <xs:enumeration value="25"/>
* </xs:restriction>
* </xs:simpleType>
* }</pre>
*
* <p><b>Example 3: </b>Map enum constant name {@literal ->} enumeration facet </p>
*
* <pre>
* //Code fragment
* @XmlType
* @XmlEnum(Integer.class)
* public enum Code {
* @XmlEnumValue("1") ONE,
* @XmlEnumValue("2") TWO;
* }
* {@code
*
* <!-- Example: XML Schema fragment -->
* <xs:simpleType name="Code">
* <xs:restriction base="xs:int">
* <xs:enumeration value="1"/>
* <xs:enumeration value="2"/>
* </xs:restriction>
* </xs:simpleType>
* }</pre>
*
* @since 1.6, JAXB 2.0
*/
@Retention(RUNTIME)
@Target({FIELD})
public @interface XmlEnumValue {
String value();
}