de.alpharogroup.db.entity.pair.KeyValueOwnerEntity Maven / Gradle / Ivy
/**
* Copyright (C) 2015 Asterios Raptis
*
* 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
*
* http://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 de.alpharogroup.db.entity.pair;
import java.io.Serializable;
import javax.persistence.Access;
import javax.persistence.AccessType;
import javax.persistence.Column;
import javax.persistence.Inheritance;
import javax.persistence.InheritanceType;
import javax.persistence.MappedSuperclass;
import de.alpharogroup.db.entity.BaseEntity;
import lombok.AccessLevel;
import lombok.AllArgsConstructor;
import lombok.Getter;
import lombok.NoArgsConstructor;
import lombok.Setter;
import lombok.experimental.FieldDefaults;
/**
* The abstract entity class {@link KeyValueOwnerEntity} holds a generic key value pair with his
* owner which can be also the parent if it is from the same type.
*
* @param
* the generic type of the technical primary key
* @param
* the generic type of the owner
* @param
* the generic type of the key
* @param
* the generic type of the value
*/
@MappedSuperclass
@Inheritance(strategy = InheritanceType.TABLE_PER_CLASS)
@Access(AccessType.FIELD)
@Getter
@Setter
@NoArgsConstructor
@AllArgsConstructor
@FieldDefaults(level = AccessLevel.PRIVATE)
public abstract class KeyValueOwnerEntity extends BaseEntity
{
/** The Constant serialVersionUID. */
private static final long serialVersionUID = 1L;
/** The key of this key-value pair. */
@Column(name = "key", nullable = false)
K key;
/** The owner of this key-value pair. */
@Column(name = "owner", nullable = false)
O owner;
/** The value of this key-value pair. */
@Column(name = "value")
V value;
}