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From "Sebastien Riou (JIRA)" <j...@apache.org>
Subject [jira] [Created] (LANG-801) Util for conversion between primitive types
Date Thu, 03 May 2012 13:38:48 GMT
Sebastien Riou created LANG-801:
-----------------------------------

             Summary: Util for conversion between primitive types
                 Key: LANG-801
                 URL: https://issues.apache.org/jira/browse/LANG-801
             Project: Commons Lang
          Issue Type: New Feature
          Components: lang.*
            Reporter: Sebastien Riou
            Priority: Minor


A utility class to convert data from one primitive type to another, in the most commonly used
fashions (big endian/little endian byte order, lsb first or msb first).
It also deals with arrays of primitive types and String containing hexadecimal numbers.

Such conversions are needed when dealing with embedded software or hardware modeling/design.
I attach a initial version which deals with the "default" encoding, the one which seems the
most natural on the JVM: little endian byte ordering, and, within a byte, lsb first.
I plan to implement the other encoding I need:
 - big endian, lsb first
 - big endian, msb first 

So far I implemented about half of the methods needed to cover the default encoding:
 - methods to convert a large data type into an array of a smaller data type (longToBytes
for example)
 - methods to convert an array of a small data type into a larger data type (bytesToLong for
example)

The remaining half consist of the methods to convert from an array of a data type into an
array of another data type (bytesToLongs, LongsToBytes)
Once this is available for different encodings, the most useful part can be done: the "bridge"
methods to convert from one encoding to another

Warning: newbie speaking here! I don't see how to attach a file here. Since a guy from the
mailing list suggested to "do a JIRA and attach the files", I assume it is possible to attach
the files only after the issue is created, well, I will see...

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