use of org.olat.ims.qti.container.Variable in project OpenOLAT by OpenOLAT.
the class QTIHelper method declareVariables.
/**
*/
public static Variables declareVariables(Element el_outcomes) {
String varName;
Variables variables = new Variables();
if (el_outcomes == null)
return variables;
List decvars = el_outcomes.selectNodes("decvar");
/*
* <decvar defaultval = "0" varname = "Var_SumofScores" vartype = "Integer"
* minvalue = "-10" maxvalue = "10" cutvalue = "0"/> <decvar minvalue = "0"
* maxvalue = "1" defaultval = "0"/>
*/
for (Iterator iter = decvars.iterator(); iter.hasNext(); ) {
Element decvar = (Element) iter.next();
// dtd CDATA 'SCORE'
varName = decvar.attributeValue("varname");
if (varName == null)
varName = "SCORE";
String varType = decvar.attributeValue("vartype");
// default
if (varType == null)
varType = "Integer";
Variable v = null;
if (varType.equals("Integer") || varType.equals("Decimal")) {
String def = decvar.attributeValue("defaultval");
String min = decvar.attributeValue("minvalue");
String max = decvar.attributeValue("maxvalue");
String cut = decvar.attributeValue("cutvalue");
v = new DecimalVariable(varName, max, min, cut, def);
variables.setVariable(v);
} else
throw new RuntimeException("vartype " + varType + " not supported (declaration)");
}
return variables;
}
use of org.olat.ims.qti.container.Variable in project OpenOLAT by OpenOLAT.
the class QTI_respcondition method process.
/**
* Response Condition
*
* ims qti 1.2.1 respcondition
* <!ELEMENT respcondition (qticomment? , conditionvar , setvar* , displayfeedback*)>
* <!ELEMENT conditionvar (not | and | or | unanswered | other | varequal | varlt | varlte |
* vargt | vargte | varsubset | varinside | varsubstring | durequal | durlt | durlte | durgt | durgte)+>
*
* <!ELEMENT setvar (#PCDATA)>
* <!ATTLIST setvar %I_VarName; action (Set | Add | Subtract | Multiply | Divide ) 'Set' >
* mit I_VarName = varname CDATA 'SCORE'
* <setvar action="Set" varname="SCORE">10</setvar>
*
* <!ELEMENT displayfeedback (#PCDATA)>
* <!ATTLIST displayfeedback feedbacktype (Response | Solution | Hint ) 'Response'
* %I_LinkRefId; >
* mit I_LinkRefId = linkrefid CDATA #REQUIRED"
* e.g. <displayfeedback feedbacktype = "Solution" linkrefid = "CorrectSoln"/>
*
* ??? should be ? ? <conditionvar><or>...</or><varequal>...</varequal></conditionvar> does not make sense
* but <conditionvar>
* <varequal respident = "Word-1">KITTENS</varequal>
* <varequal respident = "Word-2">HATS</varequal>
* </conditionvar> makes sense, so treat members of conditionvar as children of an "and" element
* @param node_respcond
*/
public boolean process(Element el_respcond, ItemContext itc, EvalContext ect) {
// 1. evaluate conditionvar
// 2. if true, set variables
// and setCurrentDisplayFeedback (TODO: assuming there is only one displayfeedback in a respcondition)
Variables vars;
Element el_condVar = (Element) el_respcond.selectSingleNode("conditionvar");
String respcondtitle = el_respcond.attributeValue("title");
QTI_and qtiAnd = QTIHelper.getQTI_and();
boolean fulfilled = qtiAnd.eval(el_condVar, itc, ect);
// continue to set variables and display feedback if question was answered correctly
if (fulfilled) {
vars = itc.getVariables();
List setvars = el_respcond.selectNodes("setvar");
for (Iterator iter = setvars.iterator(); iter.hasNext(); ) {
Element element = (Element) iter.next();
String action = element.attributeValue("action");
String varName = element.attributeValue("varname");
if (varName == null)
varName = "SCORE";
varName.trim();
String varVal = element.getText();
Variable var = vars.getVariable(varName);
if (var == null)
throw new RuntimeException("var " + varName + " is in setvar, but was not declared ");
if (action.equals("Set")) {
var.setValue(varVal);
} else {
// Add | Subtract | Multiply | Divide
if (action.equals("Add")) {
var.add(varVal);
} else if (action.equals("Subtract")) {
var.subtract(varVal);
} else if (action.equals("Multiply")) {
var.multiply(varVal);
} else if (action.equals("Divide")) {
var.divide(varVal);
}
}
}
// set displayfeedback
// <displayfeedback feedbacktype = "Response" linkrefid = "Correct"/>
// <!ATTLIST displayfeedback feedbacktype (Response | Solution | Hint ) 'Response' %I_LinkRefId; >
Output output = itc.getOutput();
List fbs = el_respcond.selectNodes("displayfeedback");
for (Iterator it_fbs = fbs.iterator(); it_fbs.hasNext(); ) {
Element el_dispfb = (Element) it_fbs.next();
// must exist (dtd)
String linkRefId = el_dispfb.attributeValue("linkrefid");
// must exist (dtd)
String feedbacktype = el_dispfb.attributeValue("feedbacktype");
Element el_resolved = (Element) itc.getEl_item().selectSingleNode(".//itemfeedback[@ident='" + linkRefId + "']");
if (el_resolved == null)
continue;
if (feedbacktype.equals("Response")) {
// additional (olat) rule:
// we want to render the original answer again in the simple case where the respcondition was generated
// by the olat export and contains only one varequal.
/*
<response_label ident = "2">
<flow_mat>
<material>
<mattext texttype="text/html">...</mattext>
</material>
</flow_mat>
</response_label>
...
<respcondition title="_olat_resp_feedback" continue="Yes">
<conditionvar>
<varequal respident="Frage6549" case="Yes">2</varequal>
</conditionvar>
<displayfeedback linkrefid="2"/>
</respcondition>
In this case, it is possible (and wished) to trace the feedback back to the answer which triggered this feedback.
Such a respcondition is identified by the title which is exactly "_olat_resp_feedback".
*/
Element el_chosenanswer = null;
if (respcondtitle != null && respcondtitle.equals("_olat_resp_feedback")) {
Element el_vareq = (Element) el_respcond.selectSingleNode(".//varequal");
String answerident = el_vareq.getText();
el_chosenanswer = (Element) itc.getEl_item().selectSingleNode(".//response_label[@ident='" + answerident + "']//material");
}
// give the whole itemfeedback to render
output.addItem_El_response(el_chosenanswer, el_resolved);
} else if (feedbacktype.equals("Solution")) {
Element el_solution = (Element) el_resolved.selectSingleNode(".//solution");
if (el_solution != null)
output.setSolution(new Solution(el_solution));
} else if (feedbacktype.equals("Hint")) {
// <!ENTITY % I_FeedbackStyle " feedbackstyle (Complete | Incremental | Multilevel | Proprietary ) 'Complete'">
Element el_hint = (Element) el_resolved.selectSingleNode(".//hint");
output.setHint(new Hint(el_hint));
}
}
}
return fulfilled;
}
use of org.olat.ims.qti.container.Variable in project openolat by klemens.
the class QTIHelper method declareVariables.
/**
*/
public static Variables declareVariables(Element el_outcomes) {
String varName;
Variables variables = new Variables();
if (el_outcomes == null)
return variables;
List decvars = el_outcomes.selectNodes("decvar");
/*
* <decvar defaultval = "0" varname = "Var_SumofScores" vartype = "Integer"
* minvalue = "-10" maxvalue = "10" cutvalue = "0"/> <decvar minvalue = "0"
* maxvalue = "1" defaultval = "0"/>
*/
for (Iterator iter = decvars.iterator(); iter.hasNext(); ) {
Element decvar = (Element) iter.next();
// dtd CDATA 'SCORE'
varName = decvar.attributeValue("varname");
if (varName == null)
varName = "SCORE";
String varType = decvar.attributeValue("vartype");
// default
if (varType == null)
varType = "Integer";
Variable v = null;
if (varType.equals("Integer") || varType.equals("Decimal")) {
String def = decvar.attributeValue("defaultval");
String min = decvar.attributeValue("minvalue");
String max = decvar.attributeValue("maxvalue");
String cut = decvar.attributeValue("cutvalue");
v = new DecimalVariable(varName, max, min, cut, def);
variables.setVariable(v);
} else
throw new RuntimeException("vartype " + varType + " not supported (declaration)");
}
return variables;
}
use of org.olat.ims.qti.container.Variable in project openolat by klemens.
the class QTI_respcondition method process.
/**
* Response Condition
*
* ims qti 1.2.1 respcondition
* <!ELEMENT respcondition (qticomment? , conditionvar , setvar* , displayfeedback*)>
* <!ELEMENT conditionvar (not | and | or | unanswered | other | varequal | varlt | varlte |
* vargt | vargte | varsubset | varinside | varsubstring | durequal | durlt | durlte | durgt | durgte)+>
*
* <!ELEMENT setvar (#PCDATA)>
* <!ATTLIST setvar %I_VarName; action (Set | Add | Subtract | Multiply | Divide ) 'Set' >
* mit I_VarName = varname CDATA 'SCORE'
* <setvar action="Set" varname="SCORE">10</setvar>
*
* <!ELEMENT displayfeedback (#PCDATA)>
* <!ATTLIST displayfeedback feedbacktype (Response | Solution | Hint ) 'Response'
* %I_LinkRefId; >
* mit I_LinkRefId = linkrefid CDATA #REQUIRED"
* e.g. <displayfeedback feedbacktype = "Solution" linkrefid = "CorrectSoln"/>
*
* ??? should be ? ? <conditionvar><or>...</or><varequal>...</varequal></conditionvar> does not make sense
* but <conditionvar>
* <varequal respident = "Word-1">KITTENS</varequal>
* <varequal respident = "Word-2">HATS</varequal>
* </conditionvar> makes sense, so treat members of conditionvar as children of an "and" element
* @param node_respcond
*/
public boolean process(Element el_respcond, ItemContext itc, EvalContext ect) {
// 1. evaluate conditionvar
// 2. if true, set variables
// and setCurrentDisplayFeedback (TODO: assuming there is only one displayfeedback in a respcondition)
Variables vars;
Element el_condVar = (Element) el_respcond.selectSingleNode("conditionvar");
String respcondtitle = el_respcond.attributeValue("title");
QTI_and qtiAnd = QTIHelper.getQTI_and();
boolean fulfilled = qtiAnd.eval(el_condVar, itc, ect);
// continue to set variables and display feedback if question was answered correctly
if (fulfilled) {
vars = itc.getVariables();
List setvars = el_respcond.selectNodes("setvar");
for (Iterator iter = setvars.iterator(); iter.hasNext(); ) {
Element element = (Element) iter.next();
String action = element.attributeValue("action");
String varName = element.attributeValue("varname");
if (varName == null)
varName = "SCORE";
varName.trim();
String varVal = element.getText();
Variable var = vars.getVariable(varName);
if (var == null)
throw new RuntimeException("var " + varName + " is in setvar, but was not declared ");
if (action.equals("Set")) {
var.setValue(varVal);
} else {
// Add | Subtract | Multiply | Divide
if (action.equals("Add")) {
var.add(varVal);
} else if (action.equals("Subtract")) {
var.subtract(varVal);
} else if (action.equals("Multiply")) {
var.multiply(varVal);
} else if (action.equals("Divide")) {
var.divide(varVal);
}
}
}
// set displayfeedback
// <displayfeedback feedbacktype = "Response" linkrefid = "Correct"/>
// <!ATTLIST displayfeedback feedbacktype (Response | Solution | Hint ) 'Response' %I_LinkRefId; >
Output output = itc.getOutput();
List fbs = el_respcond.selectNodes("displayfeedback");
for (Iterator it_fbs = fbs.iterator(); it_fbs.hasNext(); ) {
Element el_dispfb = (Element) it_fbs.next();
// must exist (dtd)
String linkRefId = el_dispfb.attributeValue("linkrefid");
// must exist (dtd)
String feedbacktype = el_dispfb.attributeValue("feedbacktype");
Element el_resolved = (Element) itc.getEl_item().selectSingleNode(".//itemfeedback[@ident='" + linkRefId + "']");
if (el_resolved == null)
continue;
if (feedbacktype.equals("Response")) {
// additional (olat) rule:
// we want to render the original answer again in the simple case where the respcondition was generated
// by the olat export and contains only one varequal.
/*
<response_label ident = "2">
<flow_mat>
<material>
<mattext texttype="text/html">...</mattext>
</material>
</flow_mat>
</response_label>
...
<respcondition title="_olat_resp_feedback" continue="Yes">
<conditionvar>
<varequal respident="Frage6549" case="Yes">2</varequal>
</conditionvar>
<displayfeedback linkrefid="2"/>
</respcondition>
In this case, it is possible (and wished) to trace the feedback back to the answer which triggered this feedback.
Such a respcondition is identified by the title which is exactly "_olat_resp_feedback".
*/
Element el_chosenanswer = null;
if (respcondtitle != null && respcondtitle.equals("_olat_resp_feedback")) {
Element el_vareq = (Element) el_respcond.selectSingleNode(".//varequal");
String answerident = el_vareq.getText();
el_chosenanswer = (Element) itc.getEl_item().selectSingleNode(".//response_label[@ident='" + answerident + "']//material");
}
// give the whole itemfeedback to render
output.addItem_El_response(el_chosenanswer, el_resolved);
} else if (feedbacktype.equals("Solution")) {
Element el_solution = (Element) el_resolved.selectSingleNode(".//solution");
if (el_solution != null)
output.setSolution(new Solution(el_solution));
} else if (feedbacktype.equals("Hint")) {
// <!ENTITY % I_FeedbackStyle " feedbackstyle (Complete | Incremental | Multilevel | Proprietary ) 'Complete'">
Element el_hint = (Element) el_resolved.selectSingleNode(".//hint");
output.setHint(new Hint(el_hint));
}
}
}
return fulfilled;
}
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