/**
* Method to parse a Slot
*
* @param slot Element The XOM element that represents the slot to be parsed.
* @return Returns the data structure that represents the slot in a way that can be used by the
* reasoning engine.
* @throws ParseException Thrown if there is an error parsing the slot.
*/
private Term parseSlot(Element slot) throws ParseException {
Elements children = slot.getChildElements();
Element firstChildName = children.get(0);
boolean dataSlot = false;
if (firstChildName.getLocalName().equals(tagNames.DATA)) {
dataSlot = true;
}
if (!firstChildName.getLocalName().equals(tagNames.IND)
&& !firstChildName.getLocalName().equals(tagNames.DATA)) {
throw new ParseException("In a <slot> only <Ind> and <Data> are allowed.");
}
// Getting the Role from the symbol Table, it will assign one if it
// doesnt already exist
int role = SymbolTable.internRole(firstChildName.getValue().trim());
Element element = children.get(1);
Term term = parseDefaultElement(element);
term.setRole(role);
if (dataSlot) {
term.setDataSlot(true);
}
return term;
}
/**
* Method to parse a resl (Rested Slot)
*
* @param resl Element The XOM element that represents the resl to be parsed.
* @return Returns the data structure that represents the resl in a way that can be used by the
* reasoning engine.
* @throws ParseException Thrown if there is an error parsing the resl.
*/
private Term parseResl(Element resl) throws ParseException {
Elements children = resl.getChildElements();
Element firstChild = skipRoleTag(children.get(0));
Term t = parseDefaultElement(firstChild);
// HACK: only change symbol, if term is no <Plex>
if (t.getSymbol() != SymbolTable.IPLEX) {
t.setRole(SymbolTable.IREST);
}
return t;
}
/**
* Method to parse a repo (Rested Positional Slot)
*
* @param repo Element The XOM element that represents the repo to be parsed.
* @return Term Returns the data structure that represents the repo in a way that can be used by
* the reasoning engine.
* @throws ParseException Thrown if there is an error parsing the repo.
*/
private Term parseRepo(Element repo) throws ParseException {
Term t = parseResl(repo);
t.setRole(SymbolTable.IPREST);
return t;
}