001 /*
002 * JBoss DNA (http://www.jboss.org/dna)
003 * See the COPYRIGHT.txt file distributed with this work for information
004 * regarding copyright ownership. Some portions may be licensed
005 * to Red Hat, Inc. under one or more contributor license agreements.
006 * See the AUTHORS.txt file in the distribution for a full listing of
007 * individual contributors.
008 *
009 * JBoss DNA is free software. Unless otherwise indicated, all code in JBoss DNA
010 * is licensed to you under the terms of the GNU Lesser General Public License as
011 * published by the Free Software Foundation; either version 2.1 of
012 * the License, or (at your option) any later version.
013 *
014 * JBoss DNA is distributed in the hope that it will be useful,
015 * but WITHOUT ANY WARRANTY; without even the implied warranty of
016 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
017 * Lesser General Public License for more details.
018 *
019 * You should have received a copy of the GNU Lesser General Public
020 * License along with this software; if not, write to the Free
021 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
022 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
023 */
024 package org.jboss.dna.connector.store.jpa.model.basic;
025
026 import java.io.Serializable;
027 import javax.persistence.Column;
028 import javax.persistence.Embeddable;
029 import net.jcip.annotations.Immutable;
030 import org.jboss.dna.common.util.HashCode;
031
032 /**
033 * An identifier for a reference, comprised of a single {@link NodeId} of the node containing the reference and a single
034 * {@link NodeId} of the node being referenced.
035 *
036 * @author Randall Hauch
037 */
038 @Embeddable
039 @Immutable
040 @org.hibernate.annotations.Immutable
041 public class ReferenceId implements Serializable {
042
043 /**
044 * Version {@value}
045 */
046 private static final long serialVersionUID = 1L;
047
048 @Column( name = "WORKSPACE_ID", nullable = false )
049 private Long workspaceId;
050
051 @Column( name = "FROM_UUID", nullable = false, updatable = false, length = 36 )
052 private String fromUuidString;
053
054 @Column( name = "TO_UUID", nullable = false, updatable = false, length = 36 )
055 private String toUuidString;
056
057 public ReferenceId() {
058 }
059
060 public ReferenceId( Long workspaceId,
061 String fromUuid,
062 String toUuid ) {
063 this.workspaceId = workspaceId;
064 this.fromUuidString = fromUuid;
065 this.toUuidString = toUuid;
066 }
067
068 /**
069 * @return fromUuidString
070 */
071 public String getFromUuidString() {
072 return fromUuidString;
073 }
074
075 /**
076 * @return toUuidString
077 */
078 public String getToUuidString() {
079 return toUuidString;
080 }
081
082 /**
083 * @return workspaceId
084 */
085 public Long getWorkspaceId() {
086 return workspaceId;
087 }
088
089 /**
090 * {@inheritDoc}
091 *
092 * @see java.lang.Object#hashCode()
093 */
094 @Override
095 public int hashCode() {
096 return HashCode.compute(fromUuidString, toUuidString);
097 }
098
099 /**
100 * {@inheritDoc}
101 *
102 * @see java.lang.Object#equals(java.lang.Object)
103 */
104 @Override
105 public boolean equals( Object obj ) {
106 if (obj == this) return true;
107 if (obj instanceof ReferenceId) {
108 ReferenceId that = (ReferenceId)obj;
109 if (this.workspaceId == null) {
110 if (that.workspaceId != null) return false;
111 } else {
112 if (!this.workspaceId.equals(that.workspaceId)) return false;
113 }
114 if (this.fromUuidString == null) {
115 if (that.fromUuidString != null) return false;
116 } else {
117 if (!this.fromUuidString.equals(that.fromUuidString)) return false;
118 }
119 if (this.toUuidString == null) {
120 if (that.toUuidString != null) return false;
121 } else {
122 if (!this.toUuidString.equals(that.toUuidString)) return false;
123 }
124 return true;
125 }
126 return false;
127 }
128
129 /**
130 * {@inheritDoc}
131 *
132 * @see java.lang.Object#toString()
133 */
134 @Override
135 public String toString() {
136 return "Reference from " + fromUuidString + " to " + toUuidString + " in workspace " + workspaceId;
137 }
138
139 }