ConnectionModelMapper.java example

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package won.protocol.util;

import org.apache.jena.rdf.model.Model;
import org.apache.jena.rdf.model.ModelFactory;
import org.apache.jena.rdf.model.Resource;
import org.apache.jena.rdf.model.Statement;
import org.apache.jena.vocabulary.RDF;
import won.protocol.model.Connection;
import won.protocol.model.ConnectionState;
import won.protocol.vocabulary.WON;

import java.net.URI;

/**
 * User: gabriel
 * Date: 09.04.13
 * T  ime: 15:38
 */
public class ConnectionModelMapper implements ModelMapper<Connection>
{

  @Override
  public Model toModel(Connection connection)
  {
    Model model = ModelFactory.createDefaultModel();
    Resource connectionMember = model.createResource(connection.getConnectionURI().toString())
        .addProperty(WON.HAS_CONNECTION_STATE, WON.toResource(connection.getState()))
        .addProperty(WON.BELONGS_TO_NEED, model.createResource(connection.getNeedURI().toString()));
    connectionMember.addProperty(RDF.type, WON.CONNECTION);
    if (connection.getRemoteConnectionURI() != null) {
      Resource remoteConnection = model.createResource(connection.getRemoteConnectionURI().toString());
      connectionMember.addProperty(WON.HAS_REMOTE_CONNECTION, remoteConnection);
    }
    if (connection.getRemoteNeedURI() != null) {
      Resource remoteNeed = model.createResource(connection.getRemoteNeedURI().toString());
      connectionMember.addProperty(WON.HAS_REMOTE_NEED, remoteNeed);
    }
    connectionMember.addProperty(WON.HAS_FACET, model.createResource(connection.getTypeURI().toString()));
    return model;
  }

  @Override
  public Connection fromModel(Model model)
  {
    Connection connection = new Connection();

    Resource connectionRes = RdfUtils.getBaseResource(model);
    connection.setConnectionURI(URI.create(connectionRes.getURI()));

    URI connectionStateURI = URI.create(connectionRes.getProperty(WON.HAS_CONNECTION_STATE).getResource().getURI());
    connection.setState(ConnectionState.parseString(connectionStateURI.getFragment()));
    Statement remoteConnectionStmt = connectionRes.getProperty(WON.HAS_REMOTE_CONNECTION);
    if (remoteConnectionStmt != null) {
      connection.setRemoteConnectionURI(URI.create(connectionRes.getProperty(WON.HAS_REMOTE_CONNECTION).getResource()
                                                                .getURI()));
    }
    connection.setNeedURI(URI.create(connectionRes.getProperty(WON.BELONGS_TO_NEED).getResource().getURI()));
    connection.setRemoteNeedURI(URI.create(connectionRes.getProperty(WON.HAS_REMOTE_NEED).getResource().getURI()));
    connection.setTypeURI(URI.create(connectionRes.getProperty(WON.HAS_FACET).getResource().getURI()));
    return connection;
  }
}