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1
56 package org.objectstyle.cayenne.modeler.dialog.objentity;
57
58 import java.util.Arrays  ;
59 import java.util.Collection ;
60 import java.util.Iterator ;
61
62 import org.apache.oro.text.perl.Perl5Util;
63 import org.objectstyle.cayenne.map.DbRelationship;
64 import org.objectstyle.cayenne.map.Entity;
65 import org.objectstyle.cayenne.map.Relationship;
66 import org.objectstyle.cayenne.util.Util;
67 import org.scopemvc.core.ModelChangeEvent;
68 import org.scopemvc.core.Selector;
69 import org.scopemvc.model.basic.BasicModel;
70
71
78 public class EntityRelationshipsModel extends BasicModel {
79 private static final Perl5Util regexUtil = new Perl5Util();
80
81 public static final Selector RELATIONSHIP_DISPLAY_NAME_SELECTOR =
82 Selector.fromString("relationshipDisplayName");
83
84 protected Entity sourceEntity;
85 protected String relationshipDisplayName;
86 protected String defaultTargetName;
87 protected Object [] relationshipNames;
88
89 static String nameFromDisplayName(String displayName) {
90 if (displayName == null) {
91 return null;
92 }
93
94 return regexUtil.match("/\\s\\[.+\\]$/", displayName)
95 ? regexUtil.substitute("s/\\s\\[.+\\]$//g", displayName)
96 : displayName;
97 }
98
99 static String displayName(Relationship relationship) {
100 if (relationship == null) {
101 return null;
102 }
103 return displayName(
104 relationship.getName(),
105 relationship.getSourceEntity(),
106 relationship.getTargetEntity());
107 }
108
109 static String displayName(String name, Entity source, Entity target) {
110 return name + " [" + source.getName() + " -> " + target.getName() + "]";
111 }
112
113
116 public EntityRelationshipsModel(Entity sourceEntity, Entity targetEntity) {
117 this.sourceEntity = sourceEntity;
118 this.defaultTargetName = targetEntity.getName();
119 this.relationshipDisplayName = "";
120 }
121
122
126 public EntityRelationshipsModel(Relationship relationship) {
127 this.sourceEntity = relationship.getSourceEntity();
128 this.relationshipDisplayName = displayName(relationship);
129 }
130
131 public synchronized Object [] getRelationshipNames() {
132 if (relationshipNames == null) {
135 Collection relationships = getSourceEntity().getRelationships();
136 int size = relationships.size();
137 Object [] names = new Object [size];
138
139 Iterator it = relationships.iterator();
140 for (int i = 0; i < size; i++) {
141 DbRelationship next = (DbRelationship) it.next();
142 names[i] = displayName(next);
143 }
144 Arrays.sort(names);
145 this.relationshipNames = names;
146 }
147
148 return relationshipNames;
149 }
150
151
155 public Entity getSourceEntity() {
156 return sourceEntity;
157 }
158
159
162 public String getRelationshipDisplayName() {
163 return relationshipDisplayName;
164 }
165
166 public void setRelationshipDisplayName(String relationshipDisplayName) {
167 if (!Util
168 .nullSafeEquals(relationshipDisplayName, this.relationshipDisplayName)) {
169 this.relationshipDisplayName = relationshipDisplayName;
170 relationshipNames = null;
171 fireModelChange(
172 ModelChangeEvent.VALUE_CHANGED,
173 RELATIONSHIP_DISPLAY_NAME_SELECTOR);
174 }
175 }
176
177 public void setRelationshipName(String relationshipName) {
178 setRelationshipDisplayName(
179 displayName(sourceEntity.getRelationship(relationshipName)));
180 }
181
182 public Relationship getSelectedRelationship() {
183 return sourceEntity.getRelationship(nameFromDisplayName(relationshipDisplayName));
184 }
185
186 public String getSourceEntityName() {
187 return sourceEntity.getName();
188 }
189
190 public String getTargetEntityName() {
191 Relationship selected = getSelectedRelationship();
192 return (selected != null) ? selected.getTargetEntityName() : defaultTargetName;
193 }
194 }
195 |
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