Benson Margulies created LUCENE-4012:
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Summary: Make all query classes serializable with Jackson, and
provide a trivial query parser to consume them
Key: LUCENE-4012
URL: https://issues.apache.org/jira/browse/LUCENE-4012
Project: Lucene - Java
Issue Type: New Feature
Components: core/queryparser
Affects Versions: 4.0
Reporter: Benson Margulies
I started off on LUCENE-4004 wanting to use DisjunctionMaxQuery via a parser.
However, this wasn't really because I thought that human beans should be
improvisationally composing such thing. My real goal was to concoct a query
tree over *here*, and then serialize it to send to Solr over *there*.
It occurs to me that if the Xml parser is pretty good for this, JSON would be
better. It further occurs to me that the query classes may already all work
with Jackson, and, if they don't, the required tweaks will be quite small. By
allowing Jackson to write out class names as needed, you get the ability to
serialize *any* query, so long as the other side has the classes in class path.
A trifle verbose, but not as verbose as XML, and furthermore squishable (though
not in a URL) via SMILE or BSON.
So, the goal of this JIRA is to accumulate tweaks to the query classes to make
them more 'bean pattern'. An alternative would be Jackson annotations. However,
I suspect that folks would be happier to minimize the level of coupling here;
in the extreme, the trivial parser could live in contrib if no one wants a
dependency, even optional, on Jackson itself.
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