Java tutorial
/******************************************************************************* * Copyright (c) 2014 antoniomariasanchez at gmail.com. * All rights reserved. This program and the accompanying materials * are made available under the terms of the GNU Public License v3.0 * which accompanies this distribution, and is available at * http://www.gnu.org/licenses/gpl.html * * Contributors: * antoniomaria - initial API and implementation ******************************************************************************/ package net.sf.gazpachoquest.questionnaire.resolver; import java.util.ArrayList; import java.util.List; import java.util.Map; import net.sf.gazpachoquest.domain.core.Breadcrumb; import net.sf.gazpachoquest.domain.core.Question; import net.sf.gazpachoquest.domain.core.QuestionBreadcrumb; import net.sf.gazpachoquest.domain.core.Questionnaire; import net.sf.gazpachoquest.domain.core.QuestionnaireDefinition; import net.sf.gazpachoquest.domain.core.Section; import net.sf.gazpachoquest.domain.core.Section.Builder; import net.sf.gazpachoquest.questionnaire.support.PageMetadataCreator; import net.sf.gazpachoquest.questionnaire.support.PageStructure; import net.sf.gazpachoquest.services.BreadcrumbService; import net.sf.gazpachoquest.services.QuestionService; import net.sf.gazpachoquest.services.QuestionnaireService; import net.sf.gazpachoquest.services.SectionService; import net.sf.gazpachoquest.types.RandomizationStrategy; import net.sf.gazpachoquest.types.RenderingMode; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Component; import org.springframework.util.Assert; @Component("QuestionByQuestionRelevanceAwareResolver") public class QuestionByQuestionRelevanceAwareResolver extends AbstractResolver<QuestionBreadcrumb> implements PageResolver { private static final Integer INITIAL_POSITION = 0; @Autowired private BreadcrumbService breadcrumbService; @Autowired private SectionService sectionService; @Autowired private QuestionService questionService; @Autowired private QuestionnaireService questionnaireService; @Autowired private PageMetadataCreator metadataCreator; public QuestionByQuestionRelevanceAwareResolver() { super(RenderingMode.QUESTION_BY_QUESTION); } @Override protected List<QuestionBreadcrumb> makeBreadcrumbs(QuestionnaireDefinition questionnaireDefinition, Questionnaire questionnaire) { List<QuestionBreadcrumb> breadcrumbs = new ArrayList<>(); QuestionBreadcrumb breadcrumb = null; Integer questionnairDefinitionId = questionnaireDefinition.getId(); Integer questionNumberCounter = QUESTION_NUMBER_START_COUNTER; Question question = findFirstQuestion(questionnairDefinitionId); breadcrumb = QuestionBreadcrumb.with().questionnaire(questionnaire).last(Boolean.FALSE) .renderingMode(RenderingMode.QUESTION_BY_QUESTION).question(question) .questionNumber(questionNumberCounter).build(); breadcrumbs.add(breadcrumb); breadcrumbs.get(0).setLast(Boolean.TRUE); return breadcrumbs; } @Override protected QuestionBreadcrumb findNextBreadcrumb(QuestionnaireDefinition questionnaireDefinition, Questionnaire questionnaire, Map<String, Object> answers, QuestionBreadcrumb lastBreadcrumb, Integer lastBreadcrumbPosition) { Assert.notNull(lastBreadcrumbPosition, "Questionnaire not started for the given questionnaireId = " + lastBreadcrumbPosition); QuestionBreadcrumb nextBreadcrumb = null; Section lastSection = lastBreadcrumb.getQuestion().getSection(); Integer sectionId = lastSection.getId(); Integer position = questionService.findPositionInSection(lastBreadcrumb.getQuestion().getId()); boolean found = false; Question next = null; boolean isSectionRevealed = true; do { if (isSectionRevealed) { long questionsCount = sectionService.questionsCount(sectionId); if (position < questionsCount - 1) { // Not last in group next = questionService.findOneByPositionInSection(sectionId, position + 1); found = isRevealed(next.getRelevance(), answers); } } if (!found) { Integer sectionPosition = sectionService.positionInQuestionnaireDefinition(sectionId); Section nextSection = sectionService.findOneByPositionInQuestionnaireDefinition( questionnaireDefinition.getId(), sectionPosition + 1); if (nextSection == null) { return null; } sectionId = nextSection.getId(); if (isSectionRevealed = isRevealed(nextSection.getRelevance(), answers)) { position = INITIAL_POSITION - 1; } else { sectionPosition++; } } } while (!found); // Mark next element as last browsed. nextBreadcrumb = QuestionBreadcrumb.with().questionnaire(questionnaire).question(next) .questionNumber(lastBreadcrumb.getQuestionNumber() + 1) .renderingMode(RenderingMode.QUESTION_BY_QUESTION).build(); return nextBreadcrumb; } @Override protected QuestionBreadcrumb findPreviousBreadcrumb(QuestionnaireDefinition questionnaireDefinition, Questionnaire questionnaire, QuestionBreadcrumb lastBreadcrumb, Integer lastBreadcrumbPosition) { Assert.notNull(lastBreadcrumbPosition, "Questionnaire not started for the given questionnaireId = " + lastBreadcrumbPosition); if (lastBreadcrumbPosition == INITIAL_POSITION) { return null; } Breadcrumb breadcrumb = breadcrumbService.findByQuestionnaireIdAndPosition(questionnaire.getId(), lastBreadcrumbPosition - 1); Assert.isInstanceOf(QuestionBreadcrumb.class, breadcrumb); return (QuestionBreadcrumb) breadcrumb; } @Override protected boolean breadcrumbCacheEnable() { return false; } private Question findFirstQuestion(int questionnairDefinitionId) { // It assumes that the first question is always displayed Section initialGroup = sectionService.findOneByPositionInQuestionnaireDefinition(questionnairDefinitionId, INITIAL_POSITION); return questionService.findOneByPositionInSection(initialGroup.getId(), INITIAL_POSITION); } @Override protected PageStructure createPageStructure(RandomizationStrategy randomizationStrategy, List<QuestionBreadcrumb> breadcrumbs, Map<String, Object> answers) { PageStructure nextPage = super.createPageStructure(randomizationStrategy, breadcrumbs, answers); Breadcrumb active = breadcrumbs.get(0); QuestionBreadcrumb questionBreadcrumb = (QuestionBreadcrumb) active; Builder builder = Section.with(); if (!randomizationStrategy.equals(RandomizationStrategy.QUESTIONS_RANDOMIZATION)) { builder.id(questionBreadcrumb.getQuestion().getSectionId()); } Section section = builder.build(); section.addQuestion(Question.with().id(questionBreadcrumb.getQuestion().getId()) .number(questionBreadcrumb.getQuestionNumber()).build()); nextPage.addSection(section); return nextPage; } }