api/src/main/java/jakarta/xml/bind/annotation/XmlEnum.java

/*
 * Copyright (c) 2004, 2021 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Distribution License v. 1.0, which is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

package jakarta.xml.bind.annotation;

import static java.lang.annotation.ElementType.TYPE;
import java.lang.annotation.Retention;
import static java.lang.annotation.RetentionPolicy.RUNTIME;
import java.lang.annotation.Target;

/**
 * <p>
 * Maps an enum type {@link Enum} to XML representation.
 *
 * <p>This annotation, together with {@link XmlEnumValue} provides a
 * mapping of enum type to XML representation.
 *
 * <p> <b>Usage</b> </p>
 * <p>
 * The {@code @XmlEnum} annotation can be used with the
 * following program elements: 
 * <ul> 
 *   <li>enum type</li>
 * </ul>
 *
 * <p> The usage is subject to the following constraints:
 * <ul> 
 *   <li> This annotation can be used the following other annotations: 
 *         {@link XmlType},
 *         {@link XmlRootElement} </li>
 * </ul>
 * <p>See "Package Specification" in jakarta.xml.bind.package javadoc for
 * additional common information </p>
 *
 * <p>An enum type is mapped to a schema simple type with enumeration
 * facets. The schema type is derived from the Java type to which 
 * {@code @XmlEnum.value()}. Each enum constant {@code @XmlEnumValue}
 * must have a valid lexical representation for the type 
 * {@code @XmlEnum.value()}.
 *
 * <p><b>Examples:</b> See examples in {@link XmlEnumValue}
 *
 * @since 1.6, JAXB 2.0
 */

@Retention(RUNTIME) @Target({TYPE})
public @interface XmlEnum {
    /**
     * Java type that is mapped to a XML simple type.
     *
     */
    Class<?> value() default String.class;
}