http://www.dropwizard.io/1.3.16/dropwizard-jdbi: Dropwizard is a Java framework for developing ops-friendly, high-performance, RESTful web applications.
  • Coda Hale
  • Nick Telford
  • Graham O'Regan
  • Ryan Kennedy
  • Camille Fournier
  • Carlo Barbara
  • Matt Veitas
  • Ryan Tenney
  • Jochen Schalanda
  • Glenn McAllister
  • Nick Babcock
  • Justin Plock
  • Artem Prigoda 
package io.dropwizard.jdbi.args;

import org.skife.jdbi.v2.StatementContext;
import org.skife.jdbi.v2.tweak.ResultColumnMapper;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.OptionalDouble;

/**
 * A {@link ResultColumnMapper} to map {@link OptionalDouble} objects.
 */
public class OptionalDoubleMapper implements ResultColumnMapper<OptionalDouble> {
    @Override
    public OptionalDouble mapColumn(ResultSet r, int columnNumber, StatementContext ctx) throws SQLException {
        final double value = r.getDouble(columnNumber);
        return r.wasNull() ? OptionalDouble.empty() : OptionalDouble.of(value);
    }

    @Override
    public OptionalDouble mapColumn(ResultSet r, String columnLabel, StatementContext ctx) throws SQLException {
        final double value = r.getDouble(columnLabel);
        return r.wasNull() ? OptionalDouble.empty() : OptionalDouble.of(value);
    }
}