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.CaptchaException;
473: import com.octo.captcha.component.image.wordtoimage.WordToImage;
474: import com.octo.captcha.component.wordgenerator.WordGenerator;
475: import com.octo.captcha.image.ImageCaptcha;
476:
477: import java.awt.image.BufferedImage;
478: import java.util.Locale;
479: import java.util.Random;
480:
481: /**
482: * Factories for Gimpies. Built on top of WordGenerator and WordToImage. It uses
483: * thoses interfaces to build an ImageCaptha answered by a String and for which
484: * the question is : Spell the word.
485: */
486: public class GimpyFactory extends
487: com.octo.captcha.image.ImageCaptchaFactory {
488:
489: private Random myRandom = new Random();
490: private WordToImage wordToImage;
491: private WordGenerator wordGenerator;
492:
493: public static final String BUNDLE_QUESTION_KEY = Gimpy.class
494: .getName();
495:
496: public GimpyFactory(WordGenerator generator, WordToImage word2image) {
497: if (word2image == null) {
498: throw new CaptchaException("Invalid configuration"
499: + " for a GimpyFactory : WordToImage can't be null");
500: }
501: if (generator == null) {
502: throw new CaptchaException(
503: "Invalid configuration"
504: + " for a GimpyFactory : WordGenerator can't be null");
505: }
506: wordToImage = word2image;
507: wordGenerator = generator;
508:
509: }
510:
511: /**
512: * gimpies are ImageCaptcha
513: *
514: * @return the image captcha with default locale
515: */
516: public ImageCaptcha getImageCaptcha() {
517: return getImageCaptcha(Locale.getDefault());
518: }
519:
520: public WordToImage getWordToImage() {
521: return wordToImage;
522: }
523:
524: public WordGenerator getWordGenerator() {
525: return wordGenerator;
526: }
527:
528: /**
529: * gimpies are ImageCaptcha
530: *
531: * @return a pixCaptcha with the question :"spell the word"
532: */
533: public ImageCaptcha getImageCaptcha(Locale locale) {
534:
535: //lenght
536: Integer wordLenght = getRandomLenght();
537:
538: String word = getWordGenerator().getWord(wordLenght, locale);
539:
540: BufferedImage image = null;
541: try {
542: image = getWordToImage().getImage(word);
543: } catch (Throwable e) {
544: throw new CaptchaException(e);
545: }
546:
547: ImageCaptcha captcha = new Gimpy(
548: "Type the word you see below.", image, word);
549: return captcha;
550: }
551:
552: protected Integer getRandomLenght() {
553: Integer wordLenght;
554: int range = getWordToImage().getMaxAcceptedWordLenght()
555: - getWordToImage().getMinAcceptedWordLenght();
556: int randomRange = range != 0 ? myRandom.nextInt(range + 1) : 0;
557: wordLenght = new Integer(randomRange
558: + getWordToImage().getMinAcceptedWordLenght());
559: return wordLenght;
560: }
561:
562: }
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