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1   /*
2    * $Id: AnnotationValidationInterceptor.java 502294 2007-02-01 17:28:00Z niallp $
3    *
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   *  http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing,
15   * software distributed under the License is distributed on an
16   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17   * KIND, either express or implied.  See the License for the
18   * specific language governing permissions and limitations
19   * under the License.
20   */
21  package org.apache.struts2.interceptor.validation;
22  
23  import java.lang.reflect.Method;
24  
25  import com.opensymphony.xwork2.ActionInvocation;
26  import com.opensymphony.xwork2.validator.ValidationInterceptor;
27  
28  /***
29   * Extends the xwork validation interceptor to also check for a @SkipValidation
30   * annotation, and if found, don't validate this action method
31   */
32  public class AnnotationValidationInterceptor extends ValidationInterceptor {
33      
34      /*** Auto-generated serialization id */
35      private static final long serialVersionUID = 1813272797367431184L;
36  
37      protected String doIntercept(ActionInvocation invocation) throws Exception {
38          
39          Object action = invocation.getAction();
40          if (action != null) {
41              Method method = getActionMethod(action.getClass(), invocation.getProxy().getMethod());
42              SkipValidation skip = (SkipValidation) method.getAnnotation(SkipValidation.class);
43              if (skip != null) {
44                  return invocation.invoke();
45              }
46          }
47          
48          return super.doIntercept(invocation);
49      }
50      
51      // FIXME: This is copied from DefaultActionInvocation but should be exposed through the interface
52      protected Method getActionMethod(Class actionClass, String methodName) throws NoSuchMethodException {
53          Method method;
54          try {
55              method = actionClass.getMethod(methodName, new Class[0]);
56          } catch (NoSuchMethodException e) {
57              // hmm -- OK, try doXxx instead
58              try {
59                  String altMethodName = "do" + methodName.substring(0, 1).toUpperCase() + methodName.substring(1);
60                  method = actionClass.getMethod(altMethodName, new Class[0]);
61              } catch (NoSuchMethodException e1) {
62                  // throw the original one
63                  throw e;
64              }
65          }
66          return method;
67      }
68  }