/**
* recursively write out a node of the instance
* @param out
* @param e
* @param ref
* @throws IOException
*/
private void writeTreeElement(BinaryWriter out_, TreeElement e)
{
TreeElement templ = instance.getTemplatePath(e.getRef());
Boolean isGroup = !templ.isLeaf();
if (isGroup)
{
ArrayList childTypesHandled = new ArrayList();
for (int i = 0; i < templ.getNumChildren(); i++)
{
String childName = templ.getChildAt(i).getName();
if (!childTypesHandled.Contains(childName))
{
childTypesHandled.Add(childName);
int mult = e.getChildMultiplicity(childName);
if (mult > 0 && !e.getChild(childName, 0).isRelevant())
{
mult = 0;
}
ExtUtil.writeNumeric(out_, mult);
for (int j = 0; j < mult; j++)
{
writeTreeElement(out_, e.getChild(childName, j));
}
}
}
}
else
{
ExtUtil.write(out_, new ExtWrapAnswerData(this, e.dataType, e.getValue()));
}
}
/**
* recursively read in a node of the instance, by filling out the template instance
* @param e
* @param ref
* @param in
* @param pf
* @throws IOException
* @throws DeserializationException
*/
private void readTreeElement(TreeElement e, BinaryReader in_, PrototypeFactory pf)
{
TreeElement templ = instance.getTemplatePath(e.getRef());
Boolean isGroup = !templ.isLeaf();
if (isGroup)
{
ArrayList childTypes = new ArrayList();
for (int i = 0; i < templ.getNumChildren(); i++)
{
String childName = templ.getChildAt(i).getName();
if (!childTypes.Contains(childName))
{
childTypes.Add(childName);
}
}
for (int i = 0; i < childTypes.Count; i++)
{
String childName = (String)childTypes[i];
TreeReference childTemplRef = e.getRef().extendRef(childName, 0);
TreeElement childTempl = instance.getTemplatePath(childTemplRef);
Boolean repeatable = childTempl.repeatable;
int n = ExtUtil.readInt(in_);
Boolean relevant = (n > 0);
if (!repeatable && n > 1)
{
throw new DeserializationException("Detected repeated instances of a non-repeatable node");
}
if (repeatable)
{
int mult = e.getChildMultiplicity(childName);
for (int j = mult - 1; j >= 0; j--)
{
e.removeChild(childName, j);
}
for (int j = 0; j < n; j++)
{
TreeReference dstRef = e.getRef().extendRef(childName, j);
try
{
instance.copyNode(childTempl, dstRef);
}
catch (InvalidReferenceException ire)
{
//If there is an invalid reference, this is a malformed instance,
//so we'll throw a Deserialization exception.
TreeReference r = ire.InvalidReference;
if (r == null)
{
throw new DeserializationException("Null Reference while attempting to deserialize! " + ire.Message);
}
else
{
throw new DeserializationException("Invalid Reference while attemtping to deserialize! Reference: " + r.toString(true) + " | " + ire.Message);
}
}
TreeElement child = e.getChild(childName, j);
child.setRelevant(true);
readTreeElement(child, in_, pf);
}
}
else
{
TreeElement child = e.getChild(childName, 0);
child.setRelevant(relevant);
if (relevant)
{
readTreeElement(child, in_, pf);
}
}
}
}
else
{
e.setValue((IAnswerData)ExtUtil.read(in_, new ExtWrapAnswerData(e.dataType)));
}
}
//note: code overlap with FormDef.copyItemsetAnswer
public IAnswerData getAnswerValue()
{
QuestionDef q = getQuestion();
ItemsetBinding itemset = q.getDynamicChoices();
if (itemset != null)
{
if (itemset.valueRef != null)
{
List <SelectChoice> choices = getSelectChoices();
List <String> preselectedValues = new List <String>();
//determine which selections are already present in the answer
if (itemset.copyMode)
{
TreeReference destRef = itemset.getDestRef().contextualize(mTreeElement.getRef());
List <TreeReference> subNodes = form.Instance.expandReference(destRef);
for (int i = 0; i < subNodes.Count; i++)
{
TreeElement node = form.Instance.resolveReference(subNodes[i]);
String value = itemset.getRelativeValue().evalReadable(form.Instance, new EvaluationContext(form.exprEvalContext, node.getRef()));
preselectedValues.Add(value);
}
}
else
{
List <Selection> sels = new List <Selection>();
IAnswerData data = mTreeElement.getValue();
if (data is SelectMultiData)
{
sels = (List <Selection>)data.Value;
}
else if (data is SelectOneData)
{
sels = new List <Selection>();
sels.Add((Selection)data.Value);
}
for (int i = 0; i < sels.Count; i++)
{
preselectedValues.Add(sels[i].xmlValue);
}
}
//populate 'selection' with the corresponding choices (matching 'value') from the dynamic choiceset
List <Selection> selection = new List <Selection>();
for (int i = 0; i < preselectedValues.Count; i++)
{
String value = preselectedValues[i];
SelectChoice choice = null;
for (int j = 0; j < choices.Count; j++)
{
SelectChoice ch = choices[j];
if (value.Equals(ch.Value))
{
choice = ch;
break;
}
}
selection.Add(choice.selection());
}
//convert to IAnswerData
if (selection.Count == 0)
{
return(null);
}
else if (q.ControlType == Constants.CONTROL_SELECT_MULTI)
{
return(new SelectMultiData(selection));
}
else if (q.ControlType == Constants.CONTROL_SELECT_ONE)
{
return(new SelectOneData(selection[0])); //do something if more than one selected?
}
else
{
throw new SystemException("can't happen");
}
}
else
{
return(null); //cannot map up selections without <value>
}
}
else
{ //static choices
return(mTreeElement.getValue());
}
}
