Use xml and retrieve the stored data using dom parser

Assignment Help Basic Computer Science

Reference no: EM13166580

project that requires me to use XML and retrieve the stored data using DOM parser. I have it written to the point that it writes regular equations no problem. But I want to include graph using images in the form of JPEG. Is there any way I can store the name of the image in xml and call it using DOM parser? Or do I need to specifiy the path using getAbsolute path? My Dom parser has the format of:

public class RetrieveXML {

/*** Default constructor*/ private String dpath;public RetrieveXML(String path) {dpath = path;}
/*** Function to return question IDs for later output processing.* @param section* @return List of integer values of questions that are of the given difficulty*/public List returnByGraph(String graph){List questionsToReturn = new List();try {DocumentBuilderFactory dBF = DocumentBuilderFactory.newInstance();DocumentBuilder docBuilder = dBF.newDocumentBuilder();Document database = docBuilder.parse(new File(dpath));NodeList listOfQuestions = database.getElementsByTagName("question");for(int i=0; i<listOfQuestions.getLength(); i++) {Node firstQuestion = listOfQuestions.item(i);Element firstQuestionE = (Element)firstQuestion;NodeList sectionlist = firstQuestionE.getElementsByTagName("graph");Element firstSectionElement = (Element)sectionlist.item(0);NodeList textSectionList = firstSectionElement.getChildNodes();double sectionvalue = Double.valueOf(textSectionList.item(0).getNodeValue().trim());if (sectionvalue == section) {NodeList idlist = firstQuestionE.getElementsByTagName("id");Element firstIDElement = (Element)idlist.item(0);NodeList textIDList = firstIDElement.getChildNodes();String questionID = textIDList.item(0).getNodeValue().trim();questionsToReturn.add(questionID);}}}catch(ParserConfigurationException pce) {pce.printStackTrace();}catch(SAXException se) {se.printStackTrace();}catch(IOException ioe) {ioe.printStackTrace();}return questionsToReturn;}

XML file:

<TestBank>
<question><id>0002</id><subject>Calculus I</subject><section>2.2</section> <topic>limit</topic><difficulty>3</difficulty> <latex_instructions>Determine the infinite limit:</latex_instructions><latex_q>\lim_{x \to 2\pi^-} x csc x</latex_q><graph> image.jpeg </graph><jeopardy_q> </jeopardy_q><jeopardy_a> </jeopardy_a><instructions> </instructions></question><TestBank>

Reference no: EM13166580

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