Hello.
I've made a Filter which recognizes special words and return them in a
"boosted form", in a QueryParser sense.
For instance, when the filter receives "special_word", it returns
"special_word^3", so as to boost it.
The problem is that the QueryParser understands the boost syntax when the
string is given as an argument to the "parse" function, but does not get it
when it is generated by a filter in the Analyzer.
So, when my filter transforms "special_word" to "special_filter^3", the
QueryParser does not create a Query object with "special_word" as value to
look for and boost to 3, but with "special_word^3" to search and boost to 1.
Of course, it does not match anything.
Does anyone knows a solution to that problem ? Do I have to write my own
QueryParser from the beginning or do I just have to correct 2 ot 3 lines of
the original QueryParser to make it work the I'd like it to work ?
One idea is to pre-process the string before handing it to QueryParser and do a string replacement with the boosting (^3) added appropriately.
Writing your own QueryParser is certainly a possibility. There is nothing really to "correct" with the original QueryParser in this regard as it is working by design and there really is no way to feed expressions back from the analysis back into the parsing - doesn't really seem like a good idea to me. You can probably get away with subclassing QueryParser and overriding getFieldQuery to do what you want with the String passed in, and calling setBoost (rather than trying to inject "^3").
Erik
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