How to use

loadMetadata

method

in

it.unibz.inf.ontop.dbschema.RDBMetadataExtractionTools

private void addDatabaseTableToDataSetComboBox() {
  DefaultComboBoxModel<RelationDefinition> relationList = new DefaultComboBoxModel<>();
  try {
    Connection conn = ConnectionTools.getConnection(selectedSource);
    RDBMetadata md = RDBMetadataExtractionTools.createMetadata(conn, obdaModel.getTypeFactory(), jdbcTypeMapper);
    // this operation is EXPENSIVE -- only names are needed + a flag for table/view
    RDBMetadataExtractionTools.loadMetadata(md, conn, null);
    for (DatabaseRelationDefinition relation : md.getDatabaseRelations()) {
      relationList.addElement(relation);
    }
  }
  catch (SQLException e) {
    // NO-OP
  }
  cboDataSet.setModel(relationList);
  cboDataSet.setSelectedIndex(-1);
}

/***
 * extract mappings from given datasource, and insert them into the pre-processed mapping
 *
 * Duplicate Exception may happen,
 * since mapping id is generated randomly and same id may occur
 */
private SQLPPMapping bootstrapMappings(SQLPPMapping ppMapping)
    throws SQLException, DuplicateMappingException {
  if (ppMapping == null) {
    throw new IllegalArgumentException("Model should not be null");
  }
  try (Connection conn = LocalJDBCConnectionUtils.createConnection(settings)) {
    RDBMetadata metadata = RDBMetadataExtractionTools.createMetadata(conn, typeFactory, jdbcTypeMapper);
    // this operation is EXPENSIVE
    RDBMetadataExtractionTools.loadMetadata(metadata, conn, null);
    return bootstrapMappings(metadata, ppMapping);
  }
}

/***
 * extract mappings from given datasource, and insert them into the pre-processed mapping
 *
 * Duplicate Exception may happen,
 * since mapping id is generated randomly and same id may occur
 */
private SQLPPMapping bootstrapMappings(SQLPPMapping ppMapping)
    throws SQLException, DuplicateMappingException {
  if (ppMapping == null) {
    throw new IllegalArgumentException("Model should not be null");
  }
  try (Connection conn = LocalJDBCConnectionUtils.createConnection(settings)) {
    RDBMetadata metadata = RDBMetadataExtractionTools.createMetadata(conn);
    // this operation is EXPENSIVE
    RDBMetadataExtractionTools.loadMetadata(metadata, conn, null);
    return bootstrapMappings(metadata, ppMapping);
  }
}

RDBMetadataExtractionTools.loadMetadata(metadata, connection, null);
  });
  RDBMetadataExtractionTools.loadMetadata(metadata, connection, realTables);

RDBMetadataExtractionTools.loadMetadata(metadata, connection, null);
  });
  RDBMetadataExtractionTools.loadMetadata(metadata, connection, realTables);

RDBMetadataExtractionTools.loadMetadata(metadata, conn, null);