Source code: org/objectstyle/cayenne/project/validator/ObjRelationshipValidator.java
1 /* ====================================================================
2 *
3 * The ObjectStyle Group Software License, Version 1.0
4 *
5 * Copyright (c) 2002-2003 The ObjectStyle Group
6 * and individual authors of the software. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
18 * distribution.
19 *
20 * 3. The end-user documentation included with the redistribution, if
21 * any, must include the following acknowlegement:
22 * "This product includes software developed by the
23 * ObjectStyle Group (http://objectstyle.org/)."
24 * Alternately, this acknowlegement may appear in the software itself,
25 * if and wherever such third-party acknowlegements normally appear.
26 *
27 * 4. The names "ObjectStyle Group" and "Cayenne"
28 * must not be used to endorse or promote products derived
29 * from this software without prior written permission. For written
30 * permission, please contact andrus@objectstyle.org.
31 *
32 * 5. Products derived from this software may not be called "ObjectStyle"
33 * nor may "ObjectStyle" appear in their names without prior written
34 * permission of the ObjectStyle Group.
35 *
36 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
37 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
38 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
39 * DISCLAIMED. IN NO EVENT SHALL THE OBJECTSTYLE GROUP OR
40 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
41 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
42 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
43 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
44 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
45 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
46 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
47 * SUCH DAMAGE.
48 * ====================================================================
49 *
50 * This software consists of voluntary contributions made by many
51 * individuals on behalf of the ObjectStyle Group. For more
52 * information on the ObjectStyle Group, please see
53 * <http://objectstyle.org/>.
54 *
55 */
56 package org.objectstyle.cayenne.project.validator;
57
58 import java.util.Iterator;
59 import java.util.List;
60
61 import org.objectstyle.cayenne.map.DbAttributePair;
62 import org.objectstyle.cayenne.map.DbEntity;
63 import org.objectstyle.cayenne.map.DbRelationship;
64 import org.objectstyle.cayenne.map.DeleteRule;
65 import org.objectstyle.cayenne.map.ObjEntity;
66 import org.objectstyle.cayenne.map.ObjRelationship;
67 import org.objectstyle.cayenne.project.ProjectPath;
68 import org.objectstyle.cayenne.util.Util;
69
70 /**
71 * @author Andrei Adamchik
72 */
73 public class ObjRelationshipValidator extends TreeNodeValidator {
74
75 /**
76 * Constructor for ObjRelationshipValidator.
77 */
78 public ObjRelationshipValidator() {
79 super();
80 }
81
82 public void validateObject(ProjectPath path, Validator validator) {
83 ObjRelationship rel = (ObjRelationship) path.getObject();
84 if (Util.isEmptyString(rel.getName())) {
85 validator.registerError("Unnamed ObjRelationship.", path);
86 }
87 // check if there are attributes having the same name
88 else if (rel.getSourceEntity().getAttribute(rel.getName()) != null) {
89 validator.registerWarning(
90 "ObjRelationship has the same name as one of ObjAttributes",
91 path);
92 }
93
94 if (rel.getTargetEntity() == null) {
95 validator.registerError("ObjRelationship has no target entity.", path);
96 }
97 else {
98 // check for missing DbRelationship mappings
99 List dbRels = rel.getDbRelationships();
100 if (dbRels.size() == 0) {
101 validator.registerWarning(
102 "ObjRelationship has no DbRelationship mapping.",
103 path);
104 }
105 else {
106 DbEntity expectedSrc = ((ObjEntity) rel.getSourceEntity()).getDbEntity();
107 DbEntity expectedTarget =
108 ((ObjEntity) rel.getTargetEntity()).getDbEntity();
109
110 if (((DbRelationship) dbRels.get(0)).getSourceEntity() != expectedSrc
111 || ((DbRelationship) dbRels.get(dbRels.size() - 1)).getTargetEntity()
112 != expectedTarget) {
113 validator.registerWarning(
114 "ObjRelationship has incomplete DbRelationship mapping.",
115 path);
116 }
117 }
118 }
119
120 //Disallow a Nullify delete rule where the relationship is toMany and the
121 //foreign key attributes are mandatory.
122 if (rel.isToMany()
123 && !rel.isFlattened()
124 && (rel.getDeleteRule() == DeleteRule.NULLIFY)) {
125 ObjRelationship inverse = rel.getReverseRelationship();
126 if (inverse != null) {
127 DbRelationship firstRel =
128 (DbRelationship) inverse.getDbRelationships().get(0);
129 Iterator attributePairIterator = firstRel.getJoins().iterator();
130 while (attributePairIterator.hasNext()) {
131 DbAttributePair pair = (DbAttributePair) attributePairIterator.next();
132 if (pair.getSource().isMandatory()) {
133 validator.registerWarning(
134 "ObjRelationship "
135 + rel.getName()
136 + " has a Nullify delete rule and a mandatory reverse relationship ",
137 path);
138 }
139 }
140 }
141 }
142 }
143 }