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From "Pete Ford (JIRA)" <j...@apache.org>
Subject [jira] Created: (CHAIN-45) Proposed code to allow decoupling of key names in contexts from key names used in Command code
Date Mon, 15 Sep 2008 15:45:44 GMT
Proposed code to allow decoupling of key names in contexts from key names used in Command code
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                 Key: CHAIN-45
                 URL: https://issues.apache.org/jira/browse/CHAIN-45
             Project: Commons Chain
          Issue Type: New Feature
         Environment: Java environments
            Reporter: Pete Ford
            Priority: Minor


Command code typically refers to context values using fixed keys. This makes it difficult
to create commands that are truly re-usable; it's often necessary to include commands to move
values between keys so that the values are where the various commands expect them.

The attached code allows command code to refer to keys using a "logical" name which is mapped
at runtime to the actual keys to be used to access the context. The mapping between the logical
and actual names is specified per command instance and is easily set up in a catalog XML file.

The package also supports nested hierarchical contexts and allows contexts within a hierarchy
to be logically mapped in a similar way.

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