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From "Matt Massie (JIRA)" <j...@apache.org>
Subject [jira] Created: (AVRO-172) Don't include value class data/methods in each instance of a value
Date Mon, 26 Oct 2009 21:42:59 GMT
Don't include value class data/methods in each instance of a value

                 Key: AVRO-172
                 URL: https://issues.apache.org/jira/browse/AVRO-172
             Project: Avro
          Issue Type: Improvement
          Components: c
    Affects Versions: 1.2.0, 1.1.0, 1.0.0
            Reporter: Matt Massie
             Fix For: 1.2.1, 1.3.0
         Attachments: AVRO-172.patch

This patch is in response to Thiru's feedback about the current C implementation.  Thanks,
Thiru!  I appreciate the feedback.

Previously, all instances of an Avro value contained class-specific data and methods (e.g.
callbacks for reading, skipping and writing data).  This is inefficient and unnecessary.

This patch creates a per value class registry to hold all class-wide information.

Moreover, this patch creates the framework necessary for support the Avro JSON import/export
format.  Each value class registers all supported data formats (named AVRO_BINARY_FORMAT and
AVRO_JSON_IMPORT_EXPORT_FORMAT).  The current JSON parser is a DOM-like parser which is really
only suitable for process schema data.  The callbacks registered in the value class registry
will allow us to process JSON data in a SAX-link fashion moving forward.

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