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1
56 package org.objectstyle.cayenne.modeler.util;
57
58 import java.util.Comparator  ;
59
60 import org.objectstyle.cayenne.access.DataNode;
61 import org.objectstyle.cayenne.map.Attribute;
62 import org.objectstyle.cayenne.map.DataMap;
63 import org.objectstyle.cayenne.map.DbEntity;
64 import org.objectstyle.cayenne.map.Entity;
65 import org.objectstyle.cayenne.map.ObjEntity;
66 import org.objectstyle.cayenne.map.Procedure;
67 import org.objectstyle.cayenne.map.Relationship;
68 import org.objectstyle.cayenne.query.Query;
69
70
76 public class Comparators {
77
78 private static final Comparator dataDomainChildrenComparator = new DataDomainChildrenComparator();
79
80 private static final Comparator dataMapChildrenComparator = new DataMapChildrenComparator();
81
82 private static final Comparator entityChildrenComparator = new EntityChildrenComparator();
83
84 private static final Comparator namedObjectComparator = new NamedObjectComparator();
85
86
91 public static Comparator getDataDomainChildrenComparator() {
92 return dataDomainChildrenComparator;
93 }
94
95
101 public static Comparator getDataMapChildrenComparator() {
102 return dataMapChildrenComparator;
103 }
104
105
111 public static Comparator getEntityChildrenComparator() {
112 return entityChildrenComparator;
113 }
114
115
118 public static Comparator getNamedObjectComparator() {
119 return namedObjectComparator;
120 }
121
122 static class NamedObjectComparator implements Comparator {
123
124 public int compare(Object o1, Object o2) {
125
126 String name1 = ModelerUtil.getObjectName(o1);
127 String name2 = ModelerUtil.getObjectName(o2);
128
129 if (name1 == null) {
130 return (name2 != null) ? -1 : 0;
131 }
132 else if (name2 == null) {
133 return 1;
134 }
135 else {
136 return name1.compareTo(name2);
137 }
138 }
139 }
140
141 final static class DataDomainChildrenComparator extends NamedObjectComparator {
142
143 public int compare(Object o1, Object o2) {
144 int delta = getClassWeight(o1) - getClassWeight(o2);
145 if (delta != 0) {
146 return delta;
147 }
148 else {
149 return super.compare(o1, o2);
150 }
151 }
152
153 private static int getClassWeight(Object o) {
154 if (o instanceof DataMap) {
155 return 1;
156 }
157 else if (o instanceof DataNode) {
158 return 2;
159 }
160 else {
161 return Integer.MAX_VALUE;
163 }
164 }
165 }
166
167 final static class DataMapChildrenComparator extends NamedObjectComparator {
168
169 public int compare(Object o1, Object o2) {
170 int delta = getClassWeight(o1) - getClassWeight(o2);
171 if (delta != 0) {
172 return delta;
173 }
174 else {
175 return super.compare(o1, o2);
176 }
177 }
178
179 private static int getClassWeight(Object o) {
180 if (o instanceof DataMap) {
181 return 1;
182 }
183 else if (o instanceof ObjEntity) {
184 return 2;
185 }
186 else if (o instanceof DbEntity) {
187 return 3;
188 }
189 else if (o instanceof Procedure) {
190 return 4;
191 }
192 else if (o instanceof Query) {
193 return 5;
194 }
195 else {
196 return Integer.MAX_VALUE;
198 }
199 }
200 }
201
202 final static class EntityChildrenComparator extends NamedObjectComparator {
203
204 public int compare(Object o1, Object o2) {
205 int delta = getClassWeight(o1) - getClassWeight(o2);
206 if (delta != 0) {
207 return delta;
208 }
209 else {
210 return super.compare(o1, o2);
211 }
212 }
213
214 private static int getClassWeight(Object o) {
215 if (o instanceof Entity) {
216 return 1;
217 }
218 else if (o instanceof Attribute) {
219 return 2;
220 }
221 else if (o instanceof Relationship) {
222 return 3;
223 }
224 else {
225 return Integer.MAX_VALUE;
227 }
228 }
229 }
230 } |
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