...

RDFParser rdfParser = Rio.createParser(RDFFormat.RDFA);
Model model = new LinkedHashModel();
rdfParser.setRDFHandler(new StatementCollector(model));
rdfParser.parse(in, "http://www.example.org./");

librdfa extractor

Any23 uses by default Semargl with the standard RDFa 1.1. However, you can change it setting the property any23.extraction.rdfa.programmatic to off to use Semargl with the standard RDFa 1.0. And in order to use librdfa extractor you just need to set the property any23.extraction.rdfa.librdfa. If the librdfa property is set, it will override the Semargl property without regard the value that is set. By default the librdfa property is off. After, you change the extractor you can use Any23 as usual. 

In order to change the property,  you can set the ANY23_OPTS environmental variable or setting the property in the Configuration class. Check the official documentation for more details.