Hi again,
digging this one up.
This is the code I've used in my handler.
ReciprocalFloatFunction tb_valuesource;
tb_valuesource = new ReciprocalFloatFunction(new
ReverseOrdFieldSource(TIMEBIAS_FIELD), m, a, b);
FunctionQuery timebias = new FunctionQuery(tb_valuesource);
// adding to main query
BooleanQuery main = new BooleanQuery();
other_queries.setBoost(BOOST_OTHER_QUERIES);
main.add(other_queries);
timebias.setBoost(BOOST_TIMEBIAS);
main.add(timebias);
It worked, but the problem is that I fail to get a decent ration between my
other_queries and timebias. I would like to keep timebias at ~15% max
(for totally fresh docs), kind of dropping to nothing at ~one week olds.
Adding to BooleanQuery sums the subquery scores, so I guess there's no way
of controlling the ratio, right?
What I tried to do is to use multiplication:
// this part stays the same
ReciprocalFloatFunction tb_valuesource;
tb_valuesource = new ReciprocalFloatFunction(new
ReverseOrdFieldSource(TIMEBIAS_FIELD), m, a, b);
FunctionQuery timebias = new FunctionQuery(tb_valuesource);
ConstValueSource tb_const = new ConstValueSource(1.0f);
ValueSource[] tb_summa_arr = {tb_const, tb_valuesource};
SumFloatFunction tb_summa = new SumFloatFunction(tb_summa_arr);
QueryValueSource query_vs = new QueryValueSource(query, DEF_VAL);
ValueSource[] vs_arr = {query_vs, tb_summa};
ProductFloatFunction pff = new ProductFloatFunction(vs_arr);
FunctionQuery THE_QUERY = new FunctionQuery(pff);
docs.docList = searcher.getDocList(THE_QUERY, filters, null, start,
rows,
flags);
(All of the float tweakish values are ofcourse foo.)
The problem is this crashes at the last line with
Mar 20, 2008 6:59:57 PM org.apache.solr.common.SolrException log
SEVERE: java.lang.NullPointerException
at si.david.MyRequestHandler.handleRequestBody(Unknown Source)
at
org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:117)
at org.apache.solr.core.SolrCore.execute(SolrCore.java:815)
at
org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:206)
at
org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:174)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:874)
at
org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
at
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
at
org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
at java.lang.Thread.run(Thread.java:619)
I'm using a nightly build from late November.
Any ideas? Does what I am doing make any sense? Is there any other way to
accomplish what I'm trying to do?
I'm kind of lost here, thanks for the info.
D.
hossman wrote:
: How do I access the ValueSource for my DateField? I'd like to use a
: ReciprocalFloatFunction from inside the code, adding it aside others in
the
: main BooleanQuery.
The FieldType API provides a getValueSource method (so every FieldType
picks it's own best ValueSource implementaion).
-Hoss
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