WonMessageDecoder.java

package won.protocol.message;

import org.apache.jena.query.Dataset;
import org.apache.jena.query.DatasetFactory;
import org.apache.jena.riot.Lang;
import org.apache.jena.riot.RDFDataMgr;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.StringReader;

/**
 * User: ypanchenko
 * Date: 04.08.2014
 */

public class WonMessageDecoder
{

  private static final Logger logger = LoggerFactory.getLogger(WonMessageDecoder.class);

  public static WonMessage decodeFromJsonLd(String message) {
    return decode(Lang.JSONLD, message);
  }

  public static WonMessage decode(Lang lang, String message) {
    if (message == null || message.equals("")) {
      logger.warn("cannot decode empty or null string to message");
      return null;
    }
    Dataset dataset = DatasetFactory.createGeneral();
    StringReader sr = new StringReader(message);
    RDFDataMgr.read(dataset, sr, null, lang);
    return decodeFromDataset(dataset);
  }

  public static WonMessage decodeFromDataset(Dataset message) {
    return new WonMessage(message);
  }


}