AbstractValidator


1   package dinamica;
2   
3   import java.util.HashMap  ;
4   import javax.servlet.http.HttpServletRequest  ;
5   
6   /**
7    * Base class to create reusable Validator services.
8    * All Validators must subclass this class.
9    * <br>
10   * Creation date: 29/10/2003<br>
11   * Last Update: 29/10/2003<br>
12   * (c) 2003 Martin Cordova<br>
13   * This code is released under the LGPL license<br>
14   * @author Martin Cordova
15   */
16  public abstract class AbstractValidator extends GenericTransaction 
17  {
18  
19      /**
20       * Executes business specific validation rule for a request
21       * @param req Servlet Request
22       * @param inputParams Recordset with pre-validated request parameters in its native data types
23       * @param attribs Attributes defined in validator.xml for the custom-validator element - these are validator-specific, so the same
24       * valitador can receive a different set of attributes in different Actions, making it more reusable.
25       * @return TRUE if the validation passed OK.
26       * @throws Throwable
27       */
28      public abstract boolean isValid(HttpServletRequest   req, Recordset inputParams, HashMap   attribs) throws Throwable  ;
29      
30      /**
31       * 
32       * @return Error Message to be displayed by the
33       * "invalid form" action. If this method returns null then
34       * the Controller will use the on-error-label attribute defined
35       * for the validator in the validator.xml file. 
36       */
37      public String   getErrorMessage()
38      {
39          return null;
40      }
41  
42  }
43
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