/** * Attempts to parse a given string into a Jena Path. * Throws an Exception if the string cannot be parsed. * @param string the string to parse * @param model the Model to operate on (for prefixes) * @return a Path or a Resource if this is a URI */ public static Object getJenaPath(String string, Model model) throws QueryParseException { Query query = ARQFactory.get().createQuery(model, "ASK { ?a \n" + string + "\n ?b }"); Element element = query.getQueryPattern(); if(element instanceof ElementGroup) { Element e = ((ElementGroup)element).getElements().get(0); if(e instanceof ElementPathBlock) { Path path = ((ElementPathBlock) e).getPattern().get(0).getPath(); if(path instanceof P_Link && ((P_Link)path).isForward()) { return model.asRDFNode(((P_Link)path).getNode()); } else { return path; } } else if(e instanceof ElementTriplesBlock) { return model.asRDFNode(((ElementTriplesBlock) e).getPattern().get(0).getPredicate()); } } throw new QueryParseException("Not a SPARQL 1.1 Path expression", 2, 1); }
/** * Attempts to parse a given string into a Jena Path. * Throws an Exception if the string cannot be parsed. * @param string the string to parse * @param model the Model to operate on (for prefixes) * @return a Path or a Resource if this is a URI */ public static Object getJenaPath(String string, Model model) throws QueryParseException { Query query = ARQFactory.get().createQuery(model, "ASK { ?a \n" + string + "\n ?b }"); Element element = query.getQueryPattern(); if(element instanceof ElementGroup) { Element e = ((ElementGroup)element).getElements().get(0); if(e instanceof ElementPathBlock) { Path path = ((ElementPathBlock) e).getPattern().get(0).getPath(); if(path instanceof P_Link && ((P_Link)path).isForward()) { return model.asRDFNode(((P_Link)path).getNode()); } else { return path; } } else if(e instanceof ElementTriplesBlock) { return model.asRDFNode(((ElementTriplesBlock) e).getPattern().get(0).getPredicate()); } } throw new QueryParseException("Not a SPARQL 1.1 Path expression", 2, 1); }