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Java > Open Source Codes > org > apache > cocoon > forms > validation > impl > CaptchaValidator


1 /*
2  * Copyright 1999-2005 The Apache Software Foundation.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 package org.apache.cocoon.forms.validation.impl;
17
18 import org.apache.cocoon.forms.formmodel.Widget;
19 import org.apache.cocoon.forms.validation.ValidationError;
20 import org.apache.cocoon.forms.validation.ValidationErrorAware;
21 import org.apache.cocoon.forms.validation.WidgetValidator;
22
23
24 /**
25  * A {@link org.apache.cocoon.forms.validation.WidgetValidator} that relies on a CAPTCHA
26  * test.
27  *
28  * @see http://www.captcha.net/
29  * @version $Id: CaptchaValidator.java 171293 2005-05-22 08:55:42Z sylvain $
30  */
31 public class CaptchaValidator implements WidgetValidator {
32
33     private static final String JavaDoc VALIDATION_MESSAGE_KEY = "validation.captcha.mismatch";
34
35     public boolean validate(Widget widget) {
36         if (! (widget instanceof ValidationErrorAware)) {
37             // Invalid widget type
38 throw new IllegalArgumentException JavaDoc("Widget '" + widget.getRequestParameterName() + "' is not ValidationErrorAware");
39         }
40         boolean result = widget.getValue() != null && widget.getValue().equals(widget.getAttribute("secret"));
41         if (! result) {
42             ((ValidationErrorAware) widget).setValidationError(new ValidationError(VALIDATION_MESSAGE_KEY));
43         }
44         return result;
45     }
46 }
47
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