DateRangeValidator


1   package dinamica.validators;
2   
3   import java.util.HashMap  ;
4   import javax.servlet.http.HttpServletRequest  ;
5   import dinamica.*;
6   
7   /**
8    * Generic validator for date ranges (date from - date to).<br>
9    * Will return FALSE if date2 &lt; date1, requires two custom attributes named "date1" and "date2",
10   * representing the field names of the two recordset fields to use
11   * in the validation logic. Returns TRUE if any of the parameters is null.
12   * 
13   * <br>
14   * Creation date: 29/10/2003<br>
15   * Last Update: 29/10/2003<br>
16   * (c) 2004 Martin Cordova<br>
17   * This code is released under the LGPL license<br>
18   * @author Martin Cordova (dinamica@martincordova.com)
19   * */
20  public class DateRangeValidator extends AbstractValidator
21  {
22  
23      /* (non-Javadoc)
24       * @see dinamica.AbstractValidator#isValid(javax.servlet.http.HttpServletRequest, dinamica.Recordset, java.util.ArrayList)
25       */
26      public boolean isValid(
27          HttpServletRequest   req,
28          Recordset inputParams,
29          HashMap   attribs)
30          throws Throwable  
31      {
32      
33          String   date1 = (String  )attribs.get("date1");
34          String   date2 = (String  )attribs.get("date2");
35          
36          if (date1==null || date2==null)
37              throw new Throwable  ("Invalid attributes 'date1' or 'date2' - cannot be null.");
38          
39          java.util.Date   d1 = (java.util.Date  )inputParams.getValue(date1);
40          java.util.Date   d2 = (java.util.Date  )inputParams.getValue(date2);
41          
42          if (d1!=null && d2!=null && d2.compareTo(d1) < 0 )
43              return false;
44          else
45              return true;
46          
47      }
48  
49  }
50
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