001: /*
002: * Modified by Nabh Information Systems, Inc.
003: * Modifications (c) 2006 Nabh Information Systems, Inc.
004: *
005: */
006: /*
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468: */
469:
470: package com.nabhinc.util.jcaptcha;
471:
472: import com.octo.captcha.image.ImageCaptcha;
473:
474: import java.awt.image.BufferedImage;
475: import java.io.Serializable;
476:
477: /**
478: * <p>A Gimpy is a ImagCaptcha. It is also the most common captcha.</p> <ul>
479: * <li>Challenge type : image</li> <li>Response type : String</li>
480: * <li>Description : An image of a distorded word is shown. User have to
481: * recognize the word and to submit it.</li> </ul>
482: *
483: * @author <a href="mailto:mag@jcaptcha.net">Marc-Antoine Garrigue</a>
484: * @version 1.0
485: */
486: public class Gimpy extends ImageCaptcha implements Serializable {
487:
488: private String response;
489:
490: Gimpy(String question, BufferedImage challenge, String response) {
491: super (question, challenge);
492: this .response = response;
493: }
494:
495: /**
496: * Validation routine from the CAPTCHA interface. this methods verify if the
497: * response is not null and a String and then compares the given response to
498: * the internal string.
499: *
500: * @param response
501: * @return true if the given response equals the internal response, false
502: * otherwise.
503: */
504: public final Boolean validateResponse(final Object response) {
505: return (null != response && response instanceof String) ? validateResponse((String) response)
506: : Boolean.FALSE;
507: }
508:
509: /**
510: * Very simple validation routine that compares the given response to the
511: * internal string.
512: *
513: * @return true if the given response equals the internal response, false
514: * otherwise.
515: */
516: private final Boolean validateResponse(final String response) {
517: return new Boolean(response.equalsIgnoreCase(this.response));
518: };
519:
520: }
|