ArgumentsChecker


1   /*
2    * The contents of this file are subject to the terms
3    * of the Common Development and Distribution License
4    * (the License).  You may not use this file except in
5    * compliance with the License.
6    *
7    * You can obtain a copy of the license at
8    * https://glassfish.dev.java.net/public/CDDLv1.0.html or
9    * glassfish/bootstrap/legal/CDDLv1.0.txt.
10   * See the License for the specific language governing
11   * permissions and limitations under the License.
12   *
13   * When distributing Covered Code, include this CDDL
14   * Header Notice in each file and include the License file
15   * at glassfish/bootstrap/legal/CDDLv1.0.txt.
16   * If applicable, add the following below the CDDL Header,
17   * with the fields enclosed by brackets [] replaced by
18   * you own identifying information:
19   * "Portions Copyrighted [year] [name of copyright owner]"
20   *
21   * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
22   */
23  package enterprise.interceptor_stateless_ejb;
24  
25  import java.lang.reflect.Method  ;
26  
27  import javax.interceptor.AroundInvoke;
28  import javax.interceptor.InvocationContext;
29  
30  public class ArgumentsChecker {
31  
32      @AroundInvoke
33      public Object   checkArgument(InvocationContext ctx) throws Exception   {
34          Method   method = ctx.getMethod();
35          if (method.getName().equals("initUpperCase")) {
36              String   param = (String  ) (ctx.getParameters()[0]);
37              // Note that param cannot be null because
38              // it has been validated by the previous interceptor
39              char c = param.charAt(0);
40              if (!Character.isLetter(c)) {
41                  // An interceptor can throw any runtime exception or
42                  // application exceptions that are allowed in the
43                  // throws clause of the business method
44                  throw new BadArgumentException("Illegal argument: " + param);
45              }
46          }
47  
48          // Proceed to call the business method
49          return ctx.proceed();
50      }
51  
52  }
53
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