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From "Mirko Raner (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CODEC-158) Add Codec, StringCodec, and BinaryCodec interfaces that extend both encoder and decoder
Date Fri, 21 Sep 2012 22:44:07 GMT
Mirko Raner created CODEC-158:
---------------------------------

             Summary: Add Codec, StringCodec, and BinaryCodec interfaces that extend both
encoder and decoder
                 Key: CODEC-158
                 URL: https://issues.apache.org/jira/browse/CODEC-158
             Project: Commons Codec
          Issue Type: Improvement
    Affects Versions: 1.7
            Reporter: Mirko Raner
            Priority: Minor


Currently, there are no common interfaces that extend both the encoder and the decoder interfaces.
This makes it hard to deal with a codec as a single entity and requires separate treatment
of encoder and decoder parts.
For example, let's say you want to develop a storage abstraction that uses an encoding. Right
now, you would need to write

class Storage
{
    @Inject Encoder encoder;
    @Inject Decoder decoder;
    //...
}

In practice, encoder and decoder need to match, and most likely both encoder and decoder would
be bound to the same implementation, like Base64 or URLCodec. Because of the lack of a common
superinterface they need to be specified separately. There are some classes like BaseNCodec
that can be used to unify some of the encoders and decoders, but they are too specific and
restrictive.
Ideally, I would like to write:

class Storage
{
    @Inject Codec codec;
    //...
}

Assuming that combined encoder/decoder classes like Base64 would implement that Codec interface,
this could be directly bound to a combined encoder/decoder implementation.

It would be nice if these interfaces were added and the existing codec classes (BaseNCodec,
Hex, QCodec, QuotedPrintableCodec, URLCodec) could be modified to implement these new interfaces.

I'm happy to contribute a patch if there is interest in this feature.


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