/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2009, Red Hat, Inc. and/or its affiliates or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat, Inc.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package org.hibernate.test.annotations.entity;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;
import javax.persistence.UniqueConstraint;
import org.hibernate.annotations.NaturalId;
/**
* @author Guenther Demetz
*/
@Entity
@Table(uniqueConstraints = {@UniqueConstraint(columnNames={"year", "month"})})
// Remark: Without line above, hibernate creates the combined unique index as follows: unique (month, year)
// It seems that hibernate orders the attributes in alphabetic order
// We indeed want to have the inverted sequence: year, month
// In this way queries with only year in the where-clause can take advantage of this index
// N.B.: Usually a user defines a combined index beginning with the most discriminating property
public class Month {
@Id @GeneratedValue
private int id;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
@NaturalId
private int year;
@NaturalId
private int month;
}