ArrayNotEmptyValidator


1   package dinamica.validators;
2   
3   import java.util.HashMap  ;
4   import javax.servlet.http.HttpServletRequest  ;
5   import dinamica.*;
6   
7   /**
8    * Generic validator to test if an array based parameter
9    * is empty. Returns false if empty. Requires a custom attribute
10   * called "parameter-name".
11   * <br><br>
12   * Creation date: feb/10/2004<br>
13   * Last Update: feb/10/2004<br>
14   * (c) 2004 Martin Cordova<br>
15   * This code is released under the LGPL license<br>
16   * @author Martin Cordova (dinamica@martincordova.com)
17   * */
18  public class ArrayNotEmptyValidator extends AbstractValidator
19  {
20  
21      /* (non-Javadoc)
22       * @see dinamica.AbstractValidator#isValid(javax.servlet.http.HttpServletRequest, dinamica.Recordset, java.util.HashMap)
23       */
24      public boolean isValid(
25          HttpServletRequest   req,
26          Recordset inputParams,
27          HashMap   attribs)
28          throws Throwable  
29      {
30  
31          boolean flag = true;
32  
33          //validate plugin configuration
34          boolean b = attribs.containsKey("parameter-name");
35          if (!b)
36              throw new Throwable  ("Bad configuration - 'parameter-name' attribute not found.");
37  
38          //get name of the parameter representing the array of values
39          String   paramName = (String  )attribs.get("parameter-name");
40          
41          //read values
42          String   value[] = req.getParameterValues(paramName);
43          
44          //test
45          if (value==null)
46              flag = false;
47          
48          return flag;
49          
50      }
51  
52  }
53

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