if atomic.LoadUint32(&l.done) == 0 {
		return l.do(f)
	}
	return nil
}

func (l *Init) do(f func() error) error {
	l.m.Lock()
	defer l.m.Unlock()
	if atomic.LoadUint32(&l.done) == 0 {
		if err := f(); err != nil {
			return err
		}
		// Mark as done only when f() is successful
		atomic.StoreUint32(&l.done, 1)
	}
	return nil
}

            return DoubleConversionUtil.toDouble(o);
        } else if (type == Long.class) {
            return LongConversionUtil.toLong(o);
        } else if (type == Float.class) {
            return FloatConversionUtil.toFloat(o);
        } else if (type == Short.class) {
            return ShortConversionUtil.toShort(o);
        } else if (type == BigInteger.class) {
            return BigIntegerConversionUtil.toBigInteger(o);

     */
    protected static Date toDate(final Object src, final String pattern, final Locale locale) {
        if (src == null) {
            return null;
        }
        if (src.getClass() == Date.class) {
            return (Date) src;
        }
        if (src instanceof Date) {
            return new Date(((Date) src).getTime());
        }
        if (src instanceof Calendar) {

    /**
     * Gets the default current page number.
     * @return The default current page number.
     */
    protected int getDefaultCurrentPageNumber() {
        return DEFAULT_CURRENT_PAGE_NUMBER;
    }

    /**
     * Gets the total number of records.
     * @return The total number of records.
     */
    public int getAllRecordCount() {
        return allRecordCount;
    }

    /**

     * @return {@link Schema}
     */
    public static Schema newRelaxNgSchema(final Source schema) {
        assertArgumentNotNull("schema", schema);
        return newSchema(SchemaFactoryUtil.newRelaxNgSchemaFactory(), schema);
    }

    /**
     * Generates a {@link Schema} for RELAX NG from a URL.
     *
     * @param schema
     *            URL of the RELAX NG. Must not be {@literal null}.
     * @return {@link Schema}

     *            The pattern string
     * @return The converted {@literal String}
     */
    public static String toString(final Number value, final String pattern) {
        if (value != null) {
            if (pattern != null) {
                return new DecimalFormat(pattern).format(value);
            }
            return value.toString();
        }
        return null;
    }

    /**

    return new Hasher() {
      @Override
      public Hasher putByte(byte b) {
        for (Hasher hasher : hashers) {
          hasher.putByte(b);
        }
        return this;
      }

      @Override
      public Hasher putBytes(byte[] bytes) {
        for (Hasher hasher : hashers) {
          hasher.putBytes(bytes);
        }
        return this;
      }

      @Override

				// return a different error in such a scenario.
				if u.Credentials.Status == auth.AccountOff {
					return nil, errAccessKeyDisabled
				}
				return nil, errInvalidAccessKeyID
			}
			cred := u.Credentials
			// Expired credentials return error.
			if cred.IsTemp() && cred.IsExpired() {
				return nil, errInvalidAccessKeyID
			}
			return []byte(cred.SecretKey), nil

		}
		events[i] = event
	}
	return events
}

// Eval will return a lifecycle event for each object in objs
func (e *Evaluator) Eval(objs []ObjectOpts) ([]Event, error) {
	if len(objs) == 0 {
		return nil, nil
	}
	if len(objs) != objs[0].NumVersions {
		return nil, fmt.Errorf("number of versions mismatch, expected %d, got %d", objs[0].NumVersions, len(objs))
	}
	return e.eval(objs, time.Now().UTC()), nil

// Clone returns a new Err struct with the same information
func (u Err) Clone() Err {
	return Err{
		msg:    u.msg,
		detail: u.detail,
		action: u.action,
		hint:   u.hint,
	}
}

// Error returns the error message
func (u Err) Error() string {
	if u.detail == "" {
		if u.msg != "" {
			return u.msg
		}
		return "<nil>"
	}
	return u.detail
}

// Msg - Replace the current error's message