refactor in DisMaxQParserPlugin and DismaxQParser to allow extending
DismaxQParser
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Key: SOLR-786
URL: https://issues.apache.org/jira/browse/SOLR-786
Project: Solr
Issue Type: Improvement
Components: clients - java
Affects Versions: 1.3, 1.3.1, 1.4
Reporter: Wojciech Biela
Fix For: 1.3.1
I needed to change some of the default behaviour of the DismaxQParser, so as
opposed to infecting the solr codebase with our custom behaviour, I wanted to
be able to subclass the DismaxQParser and change only what we wanted to change.
Here I submit a patch that allows for such subclassing. The change that is done
to the code base in the following steps:
1. refactor in the DismaxQParser.parse() method to
addMainQuery(query, solrParams);
addBoostQuery(query, solrParams);
addBoostFunctions(query, solrParams);
2. refactor the addMainQuery() method to use
getUserQuery(userQuery, up, solrParams)
getAlternateUserQuery(solrParams)
getPhraseQuery(userQuery, pp)
3. move the DismaxQParser to the top-level to make it public (and allow
subclassing)
After applying this change I can to as follows:
1. write my own QParserPlugin to return a subclass of the DismaxQParser
2. in this subclass I override the the methods I need, in my case the
getUserQuery() method.
3. add this plugin to the solrconfig.xml and use it
the patch is done against the Solr svn trunk
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