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/*
* Copyright (c) 1998, 2024 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:
// 01/28/2009-2.0 Guy Pelletier
// - 248293: JPA 2.0 Element Collections (part 1)
// 03/27/2009-2.0 Guy Pelletier
// - 241413: JPA 2.0 Add EclipseLink support for Map type attributes
package org.eclipse.persistence.annotations;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;
import static java.lang.annotation.ElementType.FIELD;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.RetentionPolicy.RUNTIME;
/**
* The MapKeyConvert annotation specifies that a named converter should be used
* with the corresponding mapped attribute key column. The MapKeyConvert
* annotation has the following reserved names:
*
* - {@value Convert#SERIALIZED}: Uses a {@linkplain org.eclipse.persistence.mappings.converters.SerializedObjectConverter}
* on the associated mapping. When using a {@linkplain org.eclipse.persistence.mappings.converters.SerializedObjectConverter}
* the database representation is a binary field holding a serialized version of the object and the object-model representation is a the
* actual object.
* - {@value Convert#CLASS_INSTANCE}: Uses an {@linkplain org.eclipse.persistence.mappings.converters.ClassInstanceConverter}
* on the associated mapping. When using a {@linkplain org.eclipse.persistence.mappings.converters.ClassInstanceConverter}
* the database representation is a String representing the Class name and the object-model representation is an instance
* of that class built with a no-args constructor.
* - {@value Convert#XML}: Uses an {@linkplain org.eclipse.persistence.mappings.converters.SerializedObjectConverter}
* with the {@linkplain org.eclipse.persistence.sessions.serializers.XMLSerializer} on the associated mapping.
* When using a {@linkplain org.eclipse.persistence.sessions.serializers.XMLSerializer} the database representation is a
* character field holding a serialized version of the object and the object-model representation is a the actual object.
* - {@value Convert#JSON}: Uses an {@linkplain org.eclipse.persistence.mappings.converters.SerializedObjectConverter}
* with the {@linkplain org.eclipse.persistence.sessions.serializers.JSONSerializer} on the associated mapping.
* When using a {@linkplain org.eclipse.persistence.sessions.serializers.JSONSerializer} the database representation is a
* character field holding a serialized version of the object and the object-model representation is a the actual object.
* - {@value Convert#KRYO}: Uses an {@linkplain org.eclipse.persistence.mappings.converters.SerializedObjectConverter}
* with the org.eclipse.persistence.sessions.serializers.kryo.KryoSerializer on the associated mapping.
* When using a org.eclipse.persistence.sessions.serializers.kryo.KryoSerializer the database representation is a
* binary field holding a serialized version of the object and the object-model representation is a the actual object.
* - {@value Convert#NONE}: Places no converter on the associated mapping. This can be used to override a situation where either
* another converter is defaulted or another converter is set.
*
*
* When these reserved converters are not used, it is necessary to define a converter to use using the {@linkplain Converter} annotation.
*
* @see Converter
* @see ObjectTypeConverter
* @see TypeConverter
* @see org.eclipse.persistence.mappings.converters.SerializedObjectConverter
* @see org.eclipse.persistence.mappings.converters.ClassInstanceConverter
*
* @author Guy Pelletier
* @since EclipseLink 1.2
*/
@Target({METHOD, FIELD})
@Retention(RUNTIME)
public @interface MapKeyConvert {
/**
* The name of the converter to be used.
*/
String value() default Convert.NONE;
}