uk.ac.starlink.ttools.convert
Interface ValueConverter

All Known Implementing Classes:

Iso8601Converter, Iso8601ToDecimalYear, Iso8601ToJulian, SexagesimalToDegrees

public interface ValueConverter

Defines a conversion from one data type to another.

Instances of this class should be thread-safe.

Since:

24 Feb 2006

Author:

Mark Taylor

Method Summary

Object	convert(Object in) Performs a conversion from the input type to the output type.
uk.ac.starlink.table.ValueInfo	getInputInfo() Returns metadata describing the values on the input end of the conversion.
uk.ac.starlink.table.ValueInfo	getOutputInfo() Returns metadata describing the values on the output end of the conversion.
Object	unconvert(Object out) Performs a reverse conversion, from the output type to the input type.

Method Detail

getInputInfo

uk.ac.starlink.table.ValueInfo getInputInfo()

Returns metadata describing the values on the input end of the conversion.

Returns:

input info

getOutputInfo

uk.ac.starlink.table.ValueInfo getOutputInfo()

Returns metadata describing the values on the output end of the conversion.

Returns:

output info

convert

Object convert(Object in)

Performs a conversion from the input type to the output type. In general if the conversion cannot be done, a null value should be returned rather than throwing an unchecked exception.

Parameters:

in - object of input type

Returns:

corresponding object of output type

unconvert

Object unconvert(Object out)

Performs a reverse conversion, from the output type to the input type. In general if the conversion cannot be done, a null value should be returned rather than throwing an unchecked exception.

Parameters:

out - object of output type

Returns:

corresponding object of input type