01: /**
02: * Speedo: an implementation of JDO compliant personality on top of JORM generic
03: * I/O sub-system.
04: * Copyright (C) 2001-2004 France Telecom R&D
05: *
06: * This library is free software; you can redistribute it and/or
07: * modify it under the terms of the GNU Lesser General Public
08: * License as published by the Free Software Foundation; either
09: * version 2 of the License, or (at your option) any later version.
10: *
11: * This library is distributed in the hope that it will be useful,
12: * but WITHOUT ANY WARRANTY; without even the implied warranty of
13: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14: * Lesser General Public License for more details.
15: *
16: * You should have received a copy of the GNU Lesser General Public
17: * License along with this library; if not, write to the Free Software
18: * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19: *
20: *
21: *
22: * Contact: speedo@objectweb.org
23: *
24: */package org.objectweb.speedo.ejb.pobjects.ref;
25:
26: import javax.persistence.Column;
27: import javax.persistence.DiscriminatorValue;
28: import javax.persistence.Entity;
29: import javax.persistence.Inheritance;
30: import javax.persistence.InheritanceType;
31: import javax.persistence.JoinColumn;
32: import javax.persistence.Table;
33:
34: /**
35: * This is an example of self-referencing class with filtered inheritance.
36: * Used in conjonction with Litem.
37: *
38: * @author Y.Bersihand, P. Dechamboux
39: */
40:
41: @Entity
42: @Inheritance(strategy=InheritanceType.SINGLE_TABLE)
43: @DiscriminatorValue("1")
44: public class GeoRef extends Litem {
45: private GeoRef previousRef;
46:
47: public GeoRef(String name) {
48: super (name);
49: }
50:
51: @JoinColumn(name="PREV_REF",referencedColumnName="ID",nullable=true)
52: public GeoRef getPreviousRef() {
53: return previousRef;
54: }
55:
56: public void setPreviousRef(GeoRef previousRef) {
57: this.previousRef = previousRef;
58: }
59: }
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