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/*
* Copyright (c) 2011, 2020 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0,
* or the Eclipse Distribution License v. 1.0 which is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
*/
// Contributors:
// dmccann - September 14/2010 - 2.2 - Initial implementation
package org.eclipse.persistence.oxm.annotations;
import static java.lang.annotation.ElementType.FIELD;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.RetentionPolicy.RUNTIME;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;
/**
* <p><b>XmlJoinNode</b> is used in conjunction with {@code XmlKey} to specify a reference mapping. This is similar
* to XmlID and XmlIDREF but allows for keys that are of types other than ID. When used with {@code XmlJoinNodes} can
* be used to allow composite keys. The referencedXmlPath must match the xpath of a field on the target class that has
* been annotated with either XmlID or XmlKey.
*
* <p><b>Example:</b>
* <pre>
* &#64;XmlRootElement
* &#64;XmlAccessorType(XmlAccessType.FIELD)
* public class Employee {
*
* &#64;XmlKey
* public String id;
*
* public String department;
*
&#64;XmlJoinNode(xmlPath="manager/id/text()", referencedXmlPath="id/text()")
* public Employee manager;
* }
* </pre>
* @see XmlKey
* @see XmlJoinNodes
*/
@Target({METHOD, FIELD})
@Retention(RUNTIME)
public @interface XmlJoinNode {
String xmlPath();
String referencedXmlPath();
}