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1   /*
2    * Copyright 2004-2010 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  
17  package org.seasar.cubby.plugins;
18  
19  import static org.seasar.cubby.CubbyConstants.ATTR_CONVERSION_FAILURES;
20  import static org.seasar.cubby.CubbyConstants.ATTR_PARAMS;
21  import static org.seasar.cubby.CubbyConstants.ATTR_VALIDATION_FAIL;
22  import static org.seasar.cubby.validator.ValidationUtils.getValidation;
23  import static org.seasar.cubby.validator.ValidationUtils.getValidationRules;
24  
25  import java.lang.reflect.InvocationTargetException;
26  import java.util.List;
27  import java.util.Map;
28  
29  import javax.servlet.http.HttpServletRequest;
30  
31  import org.seasar.cubby.action.ActionContext;
32  import org.seasar.cubby.action.ActionResult;
33  import org.seasar.cubby.action.Validation;
34  import org.seasar.cubby.internal.controller.ConversionFailure;
35  import org.seasar.cubby.internal.controller.RequestParameterBinder;
36  import org.seasar.cubby.internal.controller.impl.RequestParameterBinderImpl;
37  import org.seasar.cubby.internal.util.RequestUtils;
38  import org.seasar.cubby.plugin.AbstractPlugin;
39  import org.seasar.cubby.plugin.ActionInvocation;
40  import org.seasar.cubby.validator.ValidationException;
41  import org.seasar.cubby.validator.ValidationFailBehaviour;
42  import org.seasar.cubby.validator.ValidationRules;
43  
44  /**
45   * 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。
46   * 
47   * @author baba
48   */
49  public class ValidationPlugin extends AbstractPlugin {
50  
51  	/** 要求パラメータをオブジェクトへバインドするクラス。 */
52  	private final RequestParameterBinder requestParameterBinder = new RequestParameterBinderImpl();
53  
54  	/**
55  	 * {@inheritDoc}
56  	 * <p>
57  	 * アクションの実行前に入力値を検証します。
58  	 * </p>
59  	 */
60  	@Override
61  	public ActionResult invokeAction(final ActionInvocation invocation)
62  			throws Exception {
63  		final HttpServletRequest request = invocation.getRequest();
64  		final Map<String, Object[]> parameterMap = RequestUtils.getAttribute(
65  				request, ATTR_PARAMS);
66  
67  		final ActionContext actionContext = invocation.getActionContext();
68  		final Object formBean = actionContext.getFormBean();
69  
70  		if (formBean != null) {
71  			final List<ConversionFailure> conversionFailures = requestParameterBinder
72  					.bind(parameterMap, formBean, actionContext);
73  			request.setAttribute(ATTR_CONVERSION_FAILURES, conversionFailures);
74  		}
75  
76  		try {
77  			final Validation validation = getValidation(actionContext
78  					.getActionMethod());
79  			if (validation != null) {
80  				final ValidationRules validationRules = getValidationRules(
81  						actionContext.getAction(), validation.rules());
82  				validationRules.validate(parameterMap, formBean, actionContext
83  						.getActionErrors());
84  			}
85  			try {
86  				return invocation.proceed();
87  			} catch (final InvocationTargetException e) {
88  				final Throwable cause = e.getCause();
89  				if (cause instanceof ValidationException) {
90  					throw (ValidationException) cause;
91  				}
92  				throw e;
93  			}
94  		} catch (final ValidationException e) {
95  			request.setAttribute(ATTR_VALIDATION_FAIL, Boolean.TRUE);
96  			final ValidationFailBehaviour behaviour = e.getBehaviour();
97  			return behaviour.getValidationErrorActionResult(actionContext);
98  		}
99  	}
100 
101 }