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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.plugins;
17  
18  import static org.seasar.cubby.CubbyConstants.ATTR_CONVERSION_FAILURES;
19  import static org.seasar.cubby.CubbyConstants.ATTR_PARAMS;
20  import static org.seasar.cubby.CubbyConstants.ATTR_VALIDATION_FAIL;
21  import static org.seasar.cubby.validator.ValidationUtils.getValidation;
22  import static org.seasar.cubby.validator.ValidationUtils.getValidationRules;
23  
24  import java.util.List;
25  import java.util.Map;
26  
27  import javax.servlet.http.HttpServletRequest;
28  
29  import org.seasar.cubby.action.ActionContext;
30  import org.seasar.cubby.action.ActionResult;
31  import org.seasar.cubby.action.Validation;
32  import org.seasar.cubby.internal.controller.ConversionFailure;
33  import org.seasar.cubby.internal.controller.RequestParameterBinder;
34  import org.seasar.cubby.internal.controller.impl.RequestParameterBinderImpl;
35  import org.seasar.cubby.internal.util.RequestUtils;
36  import org.seasar.cubby.plugin.AbstractPlugin;
37  import org.seasar.cubby.plugin.ActionInvocation;
38  import org.seasar.cubby.validator.ValidationException;
39  import org.seasar.cubby.validator.ValidationFailBehaviour;
40  import org.seasar.cubby.validator.ValidationRules;
41  
42  /**
43   * 要求パラメータからフォームオブジェクトへの値のバインドと、それに伴う型変換、要求パラメータの検証を行うプラグインです。
44   * 
45   * @author baba
46   */
47  public class ValidationPlugin extends AbstractPlugin {
48  
49  	/** 要求パラメータをオブジェクトへバインドするクラス。 */
50  	private final RequestParameterBinder requestParameterBinder = new RequestParameterBinderImpl();
51  
52  	/**
53  	 * {@inheritDoc}
54  	 * <p>
55  	 * アクションの実行前に入力値を検証します。
56  	 * </p>
57  	 */
58  	@Override
59  	public ActionResult invokeAction(final ActionInvocation invocation)
60  			throws Exception {
61  		final HttpServletRequest request = invocation.getRequest();
62  		final Map<String, Object[]> parameterMap = RequestUtils.getAttribute(
63  				request, ATTR_PARAMS);
64  
65  		final ActionContext actionContext = invocation.getActionContext();
66  		final Object formBean = actionContext.getFormBean();
67  
68  		if (formBean != null) {
69  			final List<ConversionFailure> conversionFailures = requestParameterBinder
70  					.bind(parameterMap, formBean, actionContext);
71  			request.setAttribute(ATTR_CONVERSION_FAILURES, conversionFailures);
72  		}
73  
74  		try {
75  			final Validation validation = getValidation(actionContext
76  					.getActionMethod());
77  			if (validation != null) {
78  				final ValidationRules validationRules = getValidationRules(
79  						actionContext.getAction(), validation.rules());
80  				validationRules.validate(parameterMap, formBean, actionContext
81  						.getActionErrors());
82  			}
83  			return invocation.proceed();
84  		} catch (final ValidationException e) {
85  			request.setAttribute(ATTR_VALIDATION_FAIL, Boolean.TRUE);
86  			final ValidationFailBehaviour behaviour = e.getBehaviour();
87  			return behaviour.getValidationErrorActionResult(actionContext);
88  		}
89  	}
90  
91  }