/**
* Retrieve or create a bNode representing an inferred property value.
*
* @param instance the base instance node to which the property applies
* @param prop the property node whose value is being inferred
* @param pclass the (optional, can be null) class for the inferred value.
* @return the bNode representing the property value
*/
public synchronized Node getTemp(Node instance, Node prop, Node pclass) {
NodePair ip = new NodePair(instance, prop);
Node result = null;
for (Iterator<Node> i = ipMap.getAll(ip); i.hasNext(); ) {
Node t = i.next();
if (pclass != null) {
Object tClass = classMap.get(t);
if (tClass != null && tClass.equals(pclass)) {
result = t;
break;
}
} else {
result = t;
break;
}
}
if (result == null) {
// No value yet, so create one
result = NodeFactory.createBlankNode();
ipMap.put(ip, result);
if (pclass != null) {
classMap.put(result, pclass);
}
}
return result;
}
/** Prepare the local alias map by reading the alias table from the concrete sub-class. */
protected OneToManyMap<Resource, Resource> aliasMap() {
if (m_aliasesMap == null) {
// aliases map not prepared yet, so initialise using the data from
// the concrete profile class
m_aliasesMap = new OneToManyMap<>();
Resource[][] aliases = aliasTable();
for (Resource[] aliase : aliases) {
// since alias relationship is symmetric, we record both directions
m_aliasesMap.put(aliase[0], aliase[1]);
m_aliasesMap.put(aliase[1], aliase[0]);
}
}
return m_aliasesMap;
}