protected override RelationResolution AnalyzeRelationResolution(XPathNavigator relationElement)
{
RelationResolution result = new RelationResolution();
result.atomRelation = relationElement.Value;
string atomRelationURI = relationElement.GetAttribute("uri", String.Empty).ToLower();
switch (atomRelationURI)
{
case "nxbre://operator":
result.type = AtomFunction.RelationResolutionType.NxBRE;
break;
case "nxbre://binder":
if (Binder == null)
{
throw new BREException("No binder available for relation: " + result.atomRelation);
}
result.type = AtomFunction.RelationResolutionType.Binder;
break;
case "nxbre://expression":
result.type = AtomFunction.RelationResolutionType.Expression;
break;
default:
result.type = AtomFunction.RelationResolutionType.None;
break;
}
return(result);
}
protected override RelationResolution AnalyzeRelationResolution(XPathNavigator relationElement)
{
RelationResolution result = new RelationResolution();
string lowerAtomRelation = relationElement.Value.ToLower();
if (lowerAtomRelation.StartsWith("nxbre:"))
{
result.atomRelation = relationElement.Value;
result.type = AtomFunction.RelationResolutionType.NxBRE;
}
else if (lowerAtomRelation.StartsWith("binder:"))
{
result.atomRelation = relationElement.Value;
result.type = AtomFunction.RelationResolutionType.Binder;
}
else if (lowerAtomRelation.EndsWith("()"))
{
result.atomRelation = relationElement.Value;
result.type = AtomFunction.RelationResolutionType.Binder;
}
else if (lowerAtomRelation.StartsWith("expr:"))
{
result.atomRelation = relationElement.Value;
result.type = AtomFunction.RelationResolutionType.Expression;
}
else
{
result.atomRelation = relationElement.Value;
result.type = AtomFunction.RelationResolutionType.None;
}
return(result);
}
protected Atom GetAtom(XPathNavigator atom, bool negative, bool inHead, bool resolveImmediatly)
{
// build the array of predicates
ArrayList relationPredicates = new ArrayList();
XPathNodeIterator predicates = atom.Select(RelativePredicatesXPath);
while (predicates.MoveNext())
{
relationPredicates.Add(BuildPredicate(predicates.Current, inHead, resolveImmediatly));
}
IPredicate[] predicatesArray = (IPredicate[])relationPredicates.ToArray(typeof(IPredicate));
// identify function based atom relations
XPathNodeIterator rel = atom.Select(RelativeRelationXPath);
rel.MoveNext();
RelationResolution relationResolution = AnalyzeRelationResolution(rel.Current);
if ((relationResolution.type == AtomFunction.RelationResolutionType.NxBRE) ||
(relationResolution.type == AtomFunction.RelationResolutionType.Binder))
{
return(new AtomFunction(relationResolution.type,
negative,
Binder,
relationResolution.atomRelation,
predicatesArray));
}
else if (relationResolution.type == AtomFunction.RelationResolutionType.Expression)
{
return(new AtomFunction(relationResolution.type,
negative,
new ExpressionRelater(relationResolution.atomRelation, predicatesArray),
relationResolution.atomRelation,
predicatesArray));
}
else
{
return(new Atom(negative,
relationResolution.atomRelation,
predicatesArray));
}
}
protected override RelationResolution AnalyzeRelationResolution(XPathNavigator relationElement)
{
RelationResolution result = new RelationResolution();
result.atomRelation = relationElement.Value;
string atomRelationURI = relationElement.GetAttribute("uri", String.Empty).ToLower();
switch(atomRelationURI) {
case "nxbre://operator":
result.type = AtomFunction.RelationResolutionType.NxBRE;
break;
case "nxbre://binder":
if (Binder == null) throw new BREException("No binder available for relation: " + result.atomRelation);
result.type = AtomFunction.RelationResolutionType.Binder;
break;
case "nxbre://expression":
result.type = AtomFunction.RelationResolutionType.Expression;
break;
default:
result.type = AtomFunction.RelationResolutionType.None;
break;
}
return result;
}
protected override RelationResolution AnalyzeRelationResolution(XPathNavigator relationElement)
{
RelationResolution result = new RelationResolution();
string lowerAtomRelation = relationElement.Value.ToLower();
if (lowerAtomRelation.StartsWith("nxbre:")) {
result.atomRelation = relationElement.Value;
result.type = AtomFunction.RelationResolutionType.NxBRE;
}
else if (lowerAtomRelation.StartsWith("binder:")) {
result.atomRelation = relationElement.Value;
result.type = AtomFunction.RelationResolutionType.Binder;
}
else if (lowerAtomRelation.EndsWith("()")) {
result.atomRelation = relationElement.Value;
result.type = AtomFunction.RelationResolutionType.Binder;
}
else if (lowerAtomRelation.StartsWith("expr:")) {
result.atomRelation = relationElement.Value;
result.type = AtomFunction.RelationResolutionType.Expression;
}
else {
result.atomRelation = relationElement.Value;
result.type = AtomFunction.RelationResolutionType.None;
}
return result;
}
