UpperCaseTransformer


1   package dinamica.validators;
2   
3   import java.util.HashMap  ;
4   import javax.servlet.http.HttpServletRequest  ;
5   import dinamica.*;
6   
7   /**
8    * This validator does not validate but transforms the value of the target parameter
9    * by transforming its contents to upper case characters. It is
10   * used to create SQL search search expressions against data that is stored in upper case,
11   * without programming effort and without SQL expression tricks like value = UPPER('MyLastName...').  
12   * It is configured as a validator but works as a parameter value transformer.
13   * <br><br>
14   * <br><br>
15   * Requires the following custom attributes:<br>
16   * <ul>
17   * <li> parameter: Name of the request parameter to transform. This parameter
18   * MUST be defined in validator.xml and must be of type VARCHAR.
19   * </ul>
20   * Creation date: 22/04/2005
21   * (c) 2005 Martin Cordova<br>
22   * This code is released under the LGPL license<br>
23   * Dinamica Framework - http://www.martincordova.com<br>
24   * @author Martin Cordova (dinamica@martincordova.com)
25   */
26  public class UpperCaseTransformer extends AbstractValidator
27  {
28  
29      /* (non-Javadoc)
30       * @see dinamica.AbstractValidator#isValid(javax.servlet.http.HttpServletRequest, dinamica.Recordset, java.util.HashMap)
31       */
32      public boolean isValid(HttpServletRequest   req, Recordset inputParams,
33              HashMap   attribs) throws Throwable  
34      {
35  
36          boolean bParam = attribs.containsKey("parameter");
37          if (!bParam)
38              throw new Throwable  ("[" + this.getClass().getName() + "] Missing attribute [parameter] in validator.xml");
39          
40          String   paramName = (String  )attribs.get("parameter");
41          if (!inputParams.isNull(paramName))
42          {
43              String   value = inputParams.getString(paramName);
44              value = value.toUpperCase();
45              inputParams.setValue(paramName, value);
46          }
47          
48          return true;
49          
50      }
51  
52  }
53
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