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Java > Open Source Codes > org > enhydra > barracuda > core > forms > validators > NotNullValidator


1 /*
2  * Copyright (C) 2003 Christian Cryder [christianc@granitepeaks.com]
3  *
4  * This library is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * This library is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with this library; if not, write to the Free Software
16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17  *
18  * $Id: NotNullValidator.java,v 1.14 2004/02/01 05:16:28 christianc Exp $
19  */

20 package org.enhydra.barracuda.core.forms.validators;
21
22 import java.util.*;
23
24 import org.enhydra.barracuda.core.forms.*;
25 import org.enhydra.barracuda.plankton.*;
26
27 /**
28  * This validator ensures that a form element is not null or blanks.
29  */

30 public class NotNullValidator extends DefaultFormValidator {
31
32     /**
33      * Public constructor.
34      */

35     public NotNullValidator() {
36         super();
37     }
38
39     /**
40      * Public constructor.
41      *
42      * @param ierrorMessage the message associated with this error
43      */

44     public NotNullValidator(String JavaDoc ierrorMessage) {
45         super(ierrorMessage);
46     }
47
48     /**
49      * Validate a FormElement to make sure that it is not Null or blanks.
50      *
51      * @param val the value to compare the element value to
52      * @param element the form element that contains the val
53      * to validate elements by comparing them with other elements)
54      * @param deferExceptions do we want to deferValidation exceptions
55      * and attempt to validate all elements so that we can process
56      * all the exceptions at once
57      * @throws ValidationException if the element is not valid
58      */

59     public void validateFormElement(Object JavaDoc val, FormElement element, boolean deferExceptions) throws ValidationException {
60         if (localLogger.isInfoEnabled()) localLogger.info("val="+val+" "+(val==null ? "true" : "false"));
61         // ilc_022102.1_start
62
// use isNull method to insure consistancy
63
// if (val==null || val.toString().trim().length()<1) {
64
if (this.isNull(val, element)) {
65         // ilc_022102.1_end
66
throw this.generateException(element, deferExceptions, "Value must be non-null or non-blanks");
67         }
68     }
69
70 }
71
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