As an ASF committer, I proposal the creation of a new Apache Lab,
called "noggit".
Noggit, the streaming JSON parser.
JSON is becoming increasingly important on the web as a lightweight
serialization format.
For example, JSON is becoming more widely used in web services from
Yahoo and Google.
There is a need for an "industrial strength" JSON parser for Java with
the following features:
- Streaming API (StAX/pull-parser like) for both easy and efficient parsing
- Conforms to the JSON standard: http://www.ietf.org/rfc/rfc4627.txt
- Can adhere strictly to the standard (not a superset like
existing parsers), preferably by default
- Memory efficiency
- incremental parsing (Reader-based) in order to handle huge messages
- a single byte of state needed per nested object or array
- does not read large objects (including primitives) completely
into memory unless asked
- can eliminate most copying, allowing the user to provide the
output buffer for values
- no built in size limits for primitives (less than 2GB)
- can even handle keys of any size in a map
- can handle primitives of *any* size (does not attempt to parse
numerics into a certain language primitives unless asked)
- Fast!
Other features would most likely include serialization to JSON, and
creation of Java objects from JSON (most likely List, Map, etc).
Current status of code:
I started thinking about how to do this quite a while ago, but just
started hacking on some code this week after seeing the Apache Labs.
I have some working code that shows great promise (on a preliminary
test, it's almost 3 times as fast as the StAX parser built into
Java6).
-Yonik
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