1 /*
2 * ModeShape (http://www.modeshape.org)
3 * See the COPYRIGHT.txt file distributed with this work for information
4 * regarding copyright ownership. Some portions may be licensed
5 * to Red Hat, Inc. under one or more contributor license agreements.
6 * See the AUTHORS.txt file in the distribution for a full listing of
7 * individual contributors.
8 *
9 * ModeShape is free software. Unless otherwise indicated, all code in ModeShape
10 * is licensed to you under the terms of the GNU Lesser General Public License as
11 * published by the Free Software Foundation; either version 2.1 of
12 * the License, or (at your option) any later version.
13 *
14 * ModeShape is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with this software; if not, write to the Free
21 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
22 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
23 */
24 package org.modeshape.connector.store.jpa.model.basic;
25
26 import java.io.Serializable;
27 import javax.persistence.Column;
28 import javax.persistence.Embeddable;
29 import net.jcip.annotations.Immutable;
30 import org.modeshape.common.util.HashCode;
31
32 /**
33 * An identifier for a reference, comprised of a single {@link NodeId} of the node containing the reference and a single
34 * {@link NodeId} of the node being referenced.
35 */
36 @Embeddable
37 @Immutable
38 @org.hibernate.annotations.Immutable
39 public class ReferenceId implements Serializable {
40
41 /**
42 * Version {@value}
43 */
44 private static final long serialVersionUID = 1L;
45
46 @Column( name = "WORKSPACE_ID", nullable = false )
47 private Long workspaceId;
48
49 @Column( name = "FROM_UUID", nullable = false, updatable = false, length = 36 )
50 private String fromUuidString;
51
52 @Column( name = "TO_UUID", nullable = false, updatable = false, length = 36 )
53 private String toUuidString;
54
55 public ReferenceId() {
56 }
57
58 public ReferenceId( Long workspaceId,
59 String fromUuid,
60 String toUuid ) {
61 this.workspaceId = workspaceId;
62 this.fromUuidString = fromUuid;
63 this.toUuidString = toUuid;
64 }
65
66 /**
67 * @return fromUuidString
68 */
69 public String getFromUuidString() {
70 return fromUuidString;
71 }
72
73 /**
74 * @return toUuidString
75 */
76 public String getToUuidString() {
77 return toUuidString;
78 }
79
80 /**
81 * @return workspaceId
82 */
83 public Long getWorkspaceId() {
84 return workspaceId;
85 }
86
87 /**
88 * {@inheritDoc}
89 *
90 * @see java.lang.Object#hashCode()
91 */
92 @Override
93 public int hashCode() {
94 return HashCode.compute(fromUuidString, toUuidString);
95 }
96
97 /**
98 * {@inheritDoc}
99 *
100 * @see java.lang.Object#equals(java.lang.Object)
101 */
102 @Override
103 public boolean equals( Object obj ) {
104 if (obj == this) return true;
105 if (obj instanceof ReferenceId) {
106 ReferenceId that = (ReferenceId)obj;
107 if (this.workspaceId == null) {
108 if (that.workspaceId != null) return false;
109 } else {
110 if (!this.workspaceId.equals(that.workspaceId)) return false;
111 }
112 if (this.fromUuidString == null) {
113 if (that.fromUuidString != null) return false;
114 } else {
115 if (!this.fromUuidString.equals(that.fromUuidString)) return false;
116 }
117 if (this.toUuidString == null) {
118 if (that.toUuidString != null) return false;
119 } else {
120 if (!this.toUuidString.equals(that.toUuidString)) return false;
121 }
122 return true;
123 }
124 return false;
125 }
126
127 /**
128 * {@inheritDoc}
129 *
130 * @see java.lang.Object#toString()
131 */
132 @Override
133 public String toString() {
134 return "Reference from " + fromUuidString + " to " + toUuidString + " in workspace " + workspaceId;
135 }
136
137 }