1 /*
2 * Copyright 2004-2009 the original author or authors.
3 *
4 * Licensed under the Apache 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.apache.org/licenses/LICENSE-2.0
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
17 package org.springmodules.validation.util.condition;
18
19 /**
20 * A base class for all type specific conditions. A type specific instantCondition can only checkCalendar specific object types.
21 *
22 * @author Uri Boness
23 */
24 public abstract class TypeSpecificCondition extends AbstractCondition {
25
26 private Class[] types;
27
28 /**
29 * Construts a new TypeSpecificCondition with the given supported type. Sub classes should call this constructor
30 * if they only support on object type.
31 *
32 * @param type The object type this condition supports.
33 */
34 public TypeSpecificCondition(Class type) {
35 this(new Class[]{type});
36 }
37
38 /**
39 * Constructs a new TypeSpecificCondition with a the give list of supported types. Sub-classes should call this
40 * constructor if they support more then one object type.
41 *
42 * @param types The object types this condition supports.
43 */
44 public TypeSpecificCondition(Class[] types) {
45 this.types = types;
46 }
47
48 /**
49 * Checks whether the checked object is of one of the types supported by this condition.
50 *
51 * @param object The object to be checked.
52 * @throws IllegalArgumentException if the checked object type is not supported by this condition.
53 */
54 protected void beforeObjectChecked(Object object) {
55
56 boolean foundMatchingType = false;
57
58 for (int i = 0; i < types.length; i++) {
59 if (types[i].isAssignableFrom(object.getClass())) {
60 foundMatchingType = true;
61 break;
62 }
63 }
64
65 if (!foundMatchingType) {
66 StringBuffer message = new StringBuffer(getClass().getName());
67 message.append("can only validation values of the following types: ");
68 for (int j = 0; j < types.length; j++) {
69 if (j != 0) {
70 message.append(", ");
71 }
72 message.append(types[j].getName());
73 }
74 throw new IllegalArgumentException(message.toString());
75 }
76 }
77
78 }