/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.openjpa.persistence.identity.entityasidentity2;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.IdClass;
import javax.persistence.ManyToOne;
import javax.persistence.Table;
@Entity
@Table(name = "EAI2Attendance")
@IdClass(Attendance.AttendanceId.class)
public class Attendance {
public static class AttendanceId {
private int student;
private int course;
public AttendanceId() {}
public AttendanceId(int studentId, int courseId) {
this.student = studentId;
this.course = courseId;
}
public String toString() {
return student + ":" + course;
}
public int hashCode() {
return (17 + student) * 37 + course;
}
public boolean equals(Object other) {
return this == other
|| other instanceof AttendanceId
&& student == ((AttendanceId) other).student
&& course == ((AttendanceId) other).course;
}
}
@Id @ManyToOne
Student student;
@Id @ManyToOne
Course course;
}