public static TriplePath substitute(TriplePath triplePath, Binding binding) {
if (triplePath.isTriple())
return new TriplePath(Substitute.substitute(triplePath.asTriple(), binding));
Node s = triplePath.getSubject();
Node o = triplePath.getObject();
Node s1 = substitute(s, binding);
Node o1 = substitute(o, binding);
TriplePath tp = triplePath;
if (s1 != s || o1 != o) tp = new TriplePath(s1, triplePath.getPath(), o1);
return tp;
}
public NLGElement getNLFromSingleClause(Element e) {
if (e instanceof ElementPathBlock) {
ElementPathBlock epb = (ElementPathBlock) e;
List<Triple> triples = new ArrayList<Triple>();
// get all triples. We assume that the depth of union is always 1
for (TriplePath tp : epb.getPattern().getList()) {
Triple t = tp.asTriple();
triples.add(t);
}
return getNLForTripleList(triples, "and");
} // if clause is union clause then we generate or statements
else if (e instanceof ElementUnion) {
CoordinatedPhraseElement cpe;
// cast to union
ElementUnion union = (ElementUnion) e;
List<Triple> triples = new ArrayList<Triple>();
// get all triples. We assume that the depth of union is always 1
for (Element atom : union.getElements()) {
ElementPathBlock epb = ((ElementPathBlock) (((ElementGroup) atom).getElements().get(0)));
if (!epb.isEmpty()) {
Triple t = epb.getPattern().get(0).asTriple();
triples.add(t);
}
}
return getNLForTripleList(triples, "or");
} // if it's a filter
else if (e instanceof ElementFilter) {
SPhraseSpec p = nlgFactory.createClause();
ElementFilter filter = (ElementFilter) e;
Expr expr = filter.getExpr();
return getNLFromSingleExpression(expr);
}
return null;
}
public static void addVarsFromTriplePath(Collection<Var> acc, TriplePath tpath) {
addVar(acc, tpath.getSubject());
addVar(acc, tpath.getObject());
}