/**
* OLAT - Online Learning and Training<br>
* http://www.olat.org
* <p>
* Licensed under the Apache License, Version 2.0 (the "License"); <br>
* you may not use this file except in compliance with the License.<br>
* You may obtain a copy of the License at
* <p>
* http://www.apache.org/licenses/LICENSE-2.0
* <p>
* Unless required by applicable law or agreed to in writing,<br>
* software distributed under the License is distributed on an "AS IS" BASIS, <br>
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. <br>
* See the License for the specific language governing permissions and <br>
* limitations under the License.
* <p>
* Copyright (c) since 2004 at Multimedia- & E-Learning Services (MELS),<br>
* University of Zurich, Switzerland.
* <p>
*/
package org.olat.ims.qti.render;
import java.util.Date;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Set;
import org.dom4j.Document;
import org.dom4j.DocumentFactory;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.Node;
import org.dom4j.XPath;
import org.olat.core.gui.translator.Translator;
import org.olat.core.id.Identity;
import org.olat.core.id.User;
import org.olat.core.id.UserConstants;
import org.olat.core.util.Formatter;
import org.olat.core.util.StringHelper;
import org.olat.core.util.Util;
import org.olat.ims.qti.QTIModule;
import org.olat.ims.qti.container.AssessmentContext;
import org.olat.ims.qti.container.DecimalVariable;
import org.olat.ims.qti.container.ItemContext;
import org.olat.ims.qti.container.ItemInput;
import org.olat.ims.qti.container.SectionContext;
import org.olat.ims.qti.process.AssessmentInstance;
import org.olat.ims.qti.process.QTIHelper;
import org.olat.ims.qti.process.Resolver;
/**
* @author Felix Jost
*/
public class ResultsBuilder {
/**
* <code>STATICS_PATH</code>
*/
public static final String STATICS_PATH = "staticspath";
/**
* Constructor for ResultsRenderer.
*/
public ResultsBuilder() {
super();
}
/**
* Method getResDoc.
*
* @param ai The assessment instance
* @param locale The users locale
* @param identity
* @return Document The XML document
*/
public Document getResDoc(AssessmentInstance ai, Locale locale, Identity identity) {
AssessmentContext ac = ai.getAssessmentContext();
DocumentFactory df = DocumentFactory.getInstance();
Document res_doc = df.createDocument();
Element root = df.createElement("qti_result_report");
res_doc.setRootElement(root);
Element result = root.addElement("result");
Element extension_result = result.addElement("extension_result");
// add items (not qti standard, but nice to display original questions ->
// put it into extensions)
//extension_result.
int sectioncnt = ac.getSectionContextCount();
for (int i = 0; i < sectioncnt; i++) {
SectionContext sc = ac.getSectionContext(i);
int itemcnt = sc.getItemContextCount();
for (int j = 0; j < itemcnt; j++) {
ItemContext it = sc.getItemContext(j);
Element el_item = it.getEl_item();
extension_result.add(el_item);
}
}
// add ims cp id for any media references
addStaticsPath(extension_result, ai);
// add assessment_result
// Add User information
Element context = result.addElement("context");
User user = identity.getUser();
String name = user.getProperty(UserConstants.LASTNAME, locale) + " " + user.getProperty(UserConstants.FIRSTNAME, locale) + " (" + identity.getName() + ")";
String instId = user.getProperty(UserConstants.INSTITUTIONALUSERIDENTIFIER, locale);
String instName = user.getProperty(UserConstants.INSTITUTIONALNAME, locale);
if (instId == null) instId = "N/A";
context.addElement("name").addText(name);
String institution;
if (instName == null) institution = "N/A";
else institution = instName;
if (institution == null) institution = "N/A";
// Add institutional identifier (e.g. Matrikelnummer)
Element generic_identifier = context.addElement("generic_identifier");
generic_identifier.addElement("type_label").addText(institution);
generic_identifier.addElement("identifier_string").addText(instId);
// Add start and stop date formatted as datetime
Element beginDate = context.addElement("date");
beginDate.addElement("type_label").addText("Start");
beginDate.addElement("datetime").addText(Formatter.formatDatetime(new Date(ac.getTimeOfStart())));
Element stopDate = context.addElement("date");
stopDate.addElement("type_label").addText("Stop");
stopDate.addElement("datetime").addText(Formatter.formatDatetime(new Date(ac.getTimeOfStop())));
Element ares = result.addElement("assessment_result");
ares.addAttribute("ident_ref", ac.getIdent());
if (ac.getTitle() != null) {
ares.addAttribute("asi_title", ac.getTitle());
}
// process assessment score
Element a_score = ares.addElement("outcomes").addElement("score");
a_score.addAttribute("varname", "SCORE");
String strVal = StringHelper.formatFloat(ac.getScore(), 2);
a_score.addElement("score_value").addText(strVal);
strVal = ac.getMaxScore() == -1.0f ? "N/A" : StringHelper.formatFloat(ac.getMaxScore(), 2);
a_score.addElement("score_max").addText(strVal);
strVal = ac.getCutvalue() == -1.0f ? "N/A" : StringHelper.formatFloat(ac.getCutvalue(), 2);
a_score.addElement("score_cut").addText(strVal);
addElementText(ares, "duration", QTIHelper.getISODuration(ac.getDuration()));
addElementText(ares, "num_sections", "" + ac.getSectionContextCount());
addElementText(ares, "num_sections_presented", "0");
addElementText(ares, "num_items", "" + ac.getItemContextCount());
addElementText(ares, "num_items_presented", "" + ac.getItemsPresentedCount());
addElementText(ares, "num_items_attempted", "" + ac.getItemsAttemptedCount());
// add section_result
int secnt = ac.getSectionContextCount();
for (int i = 0; i < secnt; i++) {
SectionContext secc = ac.getSectionContext(i);
Element secres = ares.addElement("section_result");
secres.addAttribute("ident_ref", secc.getIdent());
if (secc.getTitle() != null) {
secres.addAttribute("asi_title", secc.getTitle());
}
addElementText(secres, "duration", QTIHelper.getISODuration(secc.getDuration()));
addElementText(secres, "num_items", "" + secc.getItemContextCount());
addElementText(secres, "num_items_presented", "" + secc.getItemsPresentedCount());
addElementText(secres, "num_items_attempted", "" + secc.getItemsAttemptedCount());
// process section score
Element sec_score = secres.addElement("outcomes").addElement("score");
sec_score.addAttribute("varname", "SCORE");
strVal = secc.getScore() == -1.0f ? "N/A" : "" + StringHelper.formatFloat(secc.getScore(), 2);
sec_score.addElement("score_value").addText(strVal);
strVal = secc.getMaxScore() == -1.0f ? "N/A" : "" + StringHelper.formatFloat(secc.getMaxScore(), 2);
sec_score.addElement("score_max").addText(strVal);
strVal = secc.getCutValue() == -1 ? "N/A" : "" + secc.getCutValue();
sec_score.addElement("score_cut").addText(strVal);
// iterate over all items in this section context
List itemsc = secc.getSectionItemContexts();
for (Iterator it_it = itemsc.iterator(); it_it.hasNext();) {
ItemContext itemc = (ItemContext) it_it.next();
Element itres = secres.addElement("item_result");
itres.addAttribute("ident_ref", itemc.getIdent());
itres.addAttribute("asi_title", itemc.getEl_item().attributeValue("title"));
Element it_duration = itres.addElement("duration");
it_duration.addText(QTIHelper.getISODuration(itemc.getTimeSpent()));
// process item score
DecimalVariable scoreVar = (DecimalVariable) (itemc.getVariables().getSCOREVariable());
Element it_score = itres.addElement("outcomes").addElement("score");
it_score.addAttribute("varname", "SCORE");
it_score.addElement("score_value").addText(StringHelper.formatFloat(scoreVar.getTruncatedValue(), 2));
strVal = scoreVar.hasMinValue() ? "" + scoreVar.getMinValue() : "0.0";
it_score.addElement("score_min").addText(strVal);
strVal = scoreVar.hasMaxValue() ? "" + scoreVar.getMaxValue() : "N/A";
it_score.addElement("score_max").addText(strVal);
strVal = scoreVar.hasCutValue() ? "" + scoreVar.getCutValue() : "N/A";
it_score.addElement("score_cut").addText(strVal);
Element el_item = itemc.getEl_item();
Map res_responsehash = new HashMap(3);
// iterate over all responses of this item
List resps = el_item.selectNodes(".//response_lid|.//response_xy|.//response_str|.//response_num|.//response_grp");
for (Iterator it_resp = resps.iterator(); it_resp.hasNext();) {
Element resp = (Element) it_resp.next();
String ident = resp.attributeValue("ident");
String rcardinality = resp.attributeValue("rcardinality");
String rtiming = resp.attributeValue("rtiming");
// add new response
Element res_response = itres.addElement("response");
res_response.addAttribute("ident_ref", ident);
res_responsehash.put(ident, res_response); // enable lookup of
// @identref of <response>
// (needed with <varequal>
// elements
// add new response_form
//<response_lid ident="MR01" rcardinality="Multiple" rtiming="No">
Element res_responseform = res_response.addElement("response_form");
res_responseform.addAttribute("cardinality", rcardinality);
res_responseform.addAttribute("timing", rtiming);
String respName = resp.getName();
String type = respName.substring(respName.indexOf("_") + 1);
res_responseform.addAttribute("response_type", type);
// add user answer
ItemInput itemInp = itemc.getItemInput();
Translator trans = Util.createPackageTranslator(QTIModule.class, locale);
if (itemInp == null) { // user did not answer this question at all
res_response.addElement("response_value").addText(trans.translate("ResBuilder.NoAnswer"));
} else {
List userAnswer = itemInp.getAsList(ident);
if (userAnswer == null) { // user did not answer this question at
// all
res_response.addElement("response_value").addText(trans.translate("ResBuilder.NoAnswer"));
} else { // the user chose at least one option of an answer (did not
// simply click send)
for (Iterator it_ans = userAnswer.iterator(); it_ans.hasNext();) {
res_response.addElement("response_value").addText((String) it_ans.next());
}
}
}
}
/*
* The simple element correct_response can only list correct elements,
* that is, no "or" or "and" elements may be in the conditionvar.
* Pragmatic solution: if condition has ors or ands, then put whole
* conditionvar into <extension_response> (proprietary), and for easier
* cases (just "varequal" "not" elements) use correct_response.
*/
Map corr_answers = new HashMap(); // keys: respIdents, values: HashSet
// of correct answers for this
// respIdent
List respconds = el_item.selectNodes(".//respcondition");
for (Iterator it_respc = respconds.iterator(); it_respc.hasNext();) {
Element el_respc = (Element) it_respc.next();
// check for add/set in setvar elements (check for single instance
// only -> spec allows for multiple instances)
Element el_setvar = (Element) el_respc.selectSingleNode(".//setvar");
if (el_setvar == null) continue;
if (el_setvar.attributeValue("action").equals("Add") || el_setvar.attributeValue("action").equals("Set")) {
// This resrocessing gives points -> assume correct answer
float numPoints = 0;
try {
numPoints = Float.parseFloat(el_setvar.getTextTrim());
} catch (NumberFormatException nfe) {
//
}
if (numPoints <= 0) continue;
Element conditionvar = (Element) el_respc.selectSingleNode(".//conditionvar");
// there is an evaluation defined (a "resprocessing" element exists)
// if (xpath(count(.//varequal) + count(.//not) = count(.//*)) is
// true, then there are only "not" and "varequal" elements
XPath xCanHandle = DocumentHelper.createXPath("count(.//varequal) + count(.//not) = count(.//*)");
boolean canHandle = xCanHandle.matches(conditionvar);
if (!canHandle) { // maybe we have <condvar> <and> <...>, try again
Element el_and = (Element) conditionvar.selectSingleNode("and");
if (el_and != null) {
canHandle = xCanHandle.matches(el_and);
if (canHandle) { // simultate the el_and to be the conditionvar
conditionvar = el_and;
}
} else { // and finally, maybe we have an <or> element ..
Element el_or = (Element) conditionvar.selectSingleNode("or");
if (el_or != null) {
canHandle = xCanHandle.matches(el_or);
if (canHandle) { // simultate the el_and to be the conditionvar
conditionvar = el_or;
}
}
}
}
if (!canHandle) {
// qti res 1.2.1 can't handle it
Element condcopy = conditionvar.createCopy();
itres.addElement("extension_item_result").add(condcopy);
} else {
/*
* easy case: get all varequal directly under the conditionvar
* element and assume the "not" elements do not contain "not"
* elements again... <!ELEMENT response (qti_comment? ,
* response_form? , num_attempts? , response_value* ,
* extension_response?)> <!ELEMENT response_form
* (correct_response* , extension_responseform?)> <!ELEMENT
* correct_response (#PCDATA)>
*/
List vareqs = conditionvar.selectNodes("./varequal");
for (Iterator it_vareq = vareqs.iterator(); it_vareq.hasNext();) {
/*
* get the identifier of the response, so that we can attach the
* <correct_response> to the right <response> element quote: ims
* qti asi xml binding :3.6.23.1 <varequal> Element: respident
* (required). The identifier of the corresponding
* <response_lid>, <response_xy>, etc. element (this was
* assigned using its ident attribute).
*/
Element vareq = (Element) it_vareq.next();
String respIdent = vareq.attributeValue("respident");
Set respIdent_corr_answers = (Set) corr_answers.get(respIdent);
if (respIdent_corr_answers == null) respIdent_corr_answers = new HashSet(3);
respIdent_corr_answers.add(vareq.getText());
corr_answers.put(respIdent, respIdent_corr_answers);
} // for varequal
} // else varequal
} // add/set setvar
} // for resprocessing
Set resp_ids = corr_answers.keySet();
for (Iterator idents = resp_ids.iterator(); idents.hasNext();) {
String respIdent = (String) idents.next();
Set respIdent_corr_answers = (Set) corr_answers.get(respIdent);
Element res_response = (Element) res_responsehash.get(respIdent);
Element res_respform = res_response.element("response_form");
for (Iterator iter = respIdent_corr_answers.iterator(); iter.hasNext();) {
String answer = (String) iter.next();
res_respform.addElement("correct_response").addText(answer);
}
}
} // for response_xy
}
return res_doc;
}
/**
* Strip extension_result and section_result tags
*
* @param doc
*/
public static void stripDetails(Document doc) {
detachNodes("//extension_result", doc);
detachNodes("//section_result", doc);
}
/**
* Strip Item-Result tags.
*
* @param doc
*/
public static void stripItemResults(Document doc) {
detachNodes("//item_result", doc);
}
private void addElementText(Element parent, String child, String text) {
Element el = parent.addElement(child);
el.setText(text);
}
private static void detachNodes(String xPath, Document doc) {
List xpathres = doc.selectNodes(xPath);
for (Iterator iter = xpathres.iterator(); iter.hasNext();) {
Node element = (Node) iter.next();
element.detach();
}
}
private static void addStaticsPath(Element el_in, AssessmentInstance ai) {
Element el_staticspath = (Element) el_in.selectSingleNode(STATICS_PATH);
if (el_staticspath == null) {
DocumentFactory df = DocumentFactory.getInstance();
el_staticspath = df.createElement(STATICS_PATH);
Resolver resolver = ai.getResolver();
el_staticspath.addAttribute("ident", resolver.getStaticsBaseURI());
el_in.add(el_staticspath);
}
}
}