source: Dev/trunk/classes/SurveyRDFWriter.php @ 16

<?php

class SurveyRDFWriter 
{
        var $model;
                
        var $resourceSurvey;
    /**
    * Use SurveyRDFWriter::getInstance() instead of this
    * constructor.
    */
    public function __construct()
    {
        // Create empty MemModel
                $factory = new ModelFactory();
                $this->model = $factory->getDefaultModel();
                
                $this->initResources();
    }

        function initResources()
        {
                
                $this->resourceSurvey = new Resource(SURVEY);
        }
        
        public function createSurvey($sTitle, $sDescription)
        {               
                
                $predicateTitle = new Resource(TITLE);          
                $surveyTitle = new Literal($sTitle);
                $this->model->add(new Statement($this->resourceSurvey,$predicateTitle,$surveyTitle));           
                
                $predicateDescription = new Resource(DESCRIPTION);
                $surveyDescription = new Literal($sDescription);
                $this->model->add(new Statement($this->resourceSurvey,$predicateDescription,$surveyDescription));               
        }
        
        public function addQuestion($qTitle,$qDescription,$qType,$qAnswers)
        {
                $resourceQuestion = new Resource(QUESTION);
                $predicateQuestion = new Resource(HAS_QUESTION);
                $this->model->add(new Statement($this->resourceSurvey,$predicateQuestion,$resourceQuestion));
                
                $predicateTitle = new Resource(TITLE);          
                $questionTitle = new Literal($qTitle);
                $this->model->add(new Statement($resourceQuestion,$predicateTitle,$questionTitle));     
                
                $predicateDescription = new Resource(DESCRIPTION);
                $questionDescription = new Literal($qDescription);
                $this->model->add(new Statement($resourceQuestion,$predicateDescription,$questionDescription));         
                
                $predicateType = new Resource(TYPE);
                $resourceQuestionType = new Resource(QUESTION_TYPE);
                $this->model->add(new Statement($resourceQuestion,$predicateType,$resourceQuestionType));
                
                foreach($qAnswers as $answer)
                {
                        $resourceAnswer = new Resource(ANSWER);
                        $predicateAnswer = new Resource(HAS_ANSWER);    
                        $this->model->add(new Statement($resourceQuestion,$predicateAnswer,$resourceAnswer));
                        
                        $predicateTitle = new Resource(TITLE);
                        $answerTitle = new Literal($answer['Title']);
                        $this->model->add(new Statement($resourceAnswer,$predicateTitle,$answerTitle));
                        
                        $predicateDescription = new Resource(DESCRIPTION);
                        $answerDescription = new Literal($answer['Description']);
                        $this->model->add(new Statement($resourceAnswer,$predicateDescription,$answerDescription));
                        
                }
                
                
        }
        
        public function saveSurvey($sTitle)
        {
                $this->model->saveAs('surveys/'.$sTitle.'.rdf','rdf');
                
                return true;
        }

}

?>