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From "Matt Massie (JIRA)" <j...@apache.org>
Subject [jira] Created: (AVRO-268) Replace lemon-generated JSON parser with simpler recursive descent parser
Date Tue, 29 Dec 2009 23:06:29 GMT
Replace lemon-generated JSON parser with simpler recursive descent parser
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                 Key: AVRO-268
                 URL: https://issues.apache.org/jira/browse/AVRO-268
             Project: Avro
          Issue Type: Improvement
          Components: c
            Reporter: Matt Massie
             Fix For: 1.3.0


This is a drop-in replacement for the current JSON parser which is based on lemon (a LALR
parser generator).

This parser 
* reads and returns a single JSON_value and its nested children (using recursive descent parsing)
* allows you to process JSON from streams in addition to static memory buffers
* correctly processes unicode \u escaping including surrogates
* distinguishes between integer and real number representations 
* provides information about the line and character in JSON that failed to parse
* is much simpler to understand and maintain (less lines of code and source files)
* is written to allow error recovery to be added later

This patch also adds more unit tests.





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