code: @Override
      public int getSqlType(String paramName) {
          if (!hasValue(paramName)) {
              return TYPE_UNKNOWN;
          }
          Object value = getValue(paramName);
          return StatementCreatorUtils.javaTypeToSqlParameterType(value.getClass());
      }
docs: /* (non-Javadoc)
  @see org.springframework.jdbc.core.namedparam.SqlParameterSource#getSqlType(java.lang.String)