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/*
* Copyright 2021 OmniFaces
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
* an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
* specific language governing permissions and limitations under the License.
*/
package org.omnifaces.persistence.model;
import java.io.Serializable;
import jakarta.persistence.Column;
import jakarta.persistence.MappedSuperclass;
import jakarta.persistence.Version;
/**
*
* Mapped superclass for versioned entity.
* It extends from {@link TimestampedEntity} which in turn extends from {@link GeneratedIdEntity}.
* In addition to the "id", "created" and "lastModified" columns, it specifies a {@link Version} column, named "version".
* On pre persist, JPA will automatically set version to 0.
* On pre update, JPA will automatically increment version with 1.
*
* @param The generic ID type.
* @author Bauke Scholtz
*/
@MappedSuperclass
public abstract class VersionedEntity & Serializable> extends TimestampedEntity implements Versioned {
private static final long serialVersionUID = 1L;
@Version
@Column(nullable = false)
private Long version;
@Override
public Long getVersion() {
return version;
}
// No setter! JPA takes care of this.
}