1 /**
2 * Copyright 2005-2012 The Kuali Foundation
3 *
4 * Licensed under the Educational Community License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.opensource.org/licenses/ecl2.php
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package org.kuali.rice.krad.datadictionary.validation.constraint.provider;
17
18 import org.kuali.rice.krad.datadictionary.validation.capability.Constrainable;
19 import org.kuali.rice.krad.datadictionary.validation.constraint.Constraint;
20 import org.kuali.rice.krad.datadictionary.validation.constraint.resolver.ConstraintResolver;
21
22 import java.util.HashMap;
23 import java.util.List;
24 import java.util.Map;
25
26 /**
27 * BaseConstraintProvider implements a simple in memory storage map of constraint resolvers
28 *
29 * <p>This provides a convenient base class
30 * from which other constraint providers can be derived.</p>
31 *
32 * @author Kuali Rice Team (rice.collab@kuali.org)
33 * @since 1.1
34 */
35 public abstract class BaseConstraintProvider<T extends Constrainable> implements ConstraintProvider<T> {
36
37 protected Map<String, ConstraintResolver<T>> resolverMap;
38
39 /**
40 * initializes the constraints
41 *
42 * <p>By doing initialization here, and not in a constructor, constraints are only placed in memory when they are
43 * utilized.</p>
44 */
45 public void init() {
46 if (resolverMap == null) {
47 resolverMap = new HashMap<String, ConstraintResolver<T>>();
48 }
49
50 }
51
52 /**
53 * @see org.kuali.rice.krad.datadictionary.validation.constraint.provider.ConstraintProvider#getConstraints(org.kuali.rice.krad.datadictionary.validation.capability.Constrainable,
54 * java.lang.Class)
55 */
56 @Override
57 public List<Constraint> getConstraints(T definition, Class<? extends Constraint> constraintType) {
58 if (resolverMap == null) {
59 init();
60 }
61
62 ConstraintResolver<T> resolver = resolverMap.get(constraintType.getName());
63
64 if (resolver == null) {
65 return null;
66 }
67
68 return resolver.resolve(definition);
69 }
70
71 /**
72 * @return the resolverMap
73 */
74 public Map<String, ConstraintResolver<T>> getResolverMap() {
75 return this.resolverMap;
76 }
77
78 /**
79 * @param resolverMap the resolverMap to set
80 */
81 public void setResolverMap(Map<String, ConstraintResolver<T>> resolverMap) {
82 this.resolverMap = resolverMap;
83 }
84
85 }