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1   /*
2    * Copyright 2004-2009 the Seasar Foundation and the Others.
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,
13   * either express or implied. See the License for the specific language
14   * governing permissions and limitations under the License.
15   */
16  package org.seasar.cubby.validator;
17  
18  import static org.seasar.cubby.internal.util.LogMessages.format;
19  
20  import java.lang.reflect.Method;
21  
22  import org.seasar.cubby.action.Validation;
23  import org.seasar.cubby.spi.beans.Attribute;
24  import org.seasar.cubby.spi.beans.BeanDesc;
25  import org.seasar.cubby.spi.beans.BeanDescFactory;
26  
27  /**
28   * バリデーションのユーティリティクラスです。
29   * 
30   * @author baba
31   */
32  public class ValidationUtils {
33  
34  	/**
35  	 * 指定されたメソッドを修飾する {@link Validation} を取得します。
36  	 * 
37  	 * @param method
38  	 *            メソッド
39  	 * @return {@link Validation}、修飾されていない場合は <code>null</code>
40  	 */
41  	public static Validation getValidation(final Method method) {
42  		return method.getAnnotation(Validation.class);
43  	}
44  
45  	/**
46  	 * 実行しているアクションメソッドの入力検証ルールの集合を取得します。
47  	 * 
48  	 * @param action
49  	 *            アクション
50  	 * @param attributeName
51  	 *            入力検証ルールの集合が定義された属性名
52  	 * @return アクションメソッドの入力検証ルールの集合
53  	 */
54  	public static ValidationRules getValidationRules(final Object action,
55  			final String attributeName) {
56  		final BeanDesc beanDesc = BeanDescFactory
57  				.getBeanDesc(action.getClass());
58  		final Attribute attribute;
59  		if (beanDesc.hasPropertyAttribute(attributeName)) {
60  			attribute = beanDesc.getPropertyAttribute(attributeName);
61  		} else if (beanDesc.hasFieldAttribute(attributeName)) {
62  			attribute = beanDesc.getFieldAttribute(attributeName);
63  		} else {
64  			throw new IllegalStateException(format("ECUB0113", action,
65  					attributeName));
66  		}
67  		if (!ValidationRules.class.isAssignableFrom(attribute.getType())) {
68  			throw new IllegalStateException(format("ECUB0114", action,
69  					attributeName, ValidationRules.class.getName()));
70  		}
71  		final ValidationRules rules = (ValidationRules) attribute
72  				.getValue(action);
73  		return rules;
74  	}
75  
76  }