Did anyone reply to this yet?
On Dec 21, 2006, at 6:30 PM, Andy Berryman wrote:
Example: Find all documents with the phrase "star wars dvd" in
Contents
that have a DocID beginning with "ZXY".
(Contents:"star wars dvd") AND (DocID:ZXY*)
What I'd like to know is how to build this programmatically instead
of using
the QueryParser. I have a general idea, but I'm looking for some
help and
validation from the group please. Can someone out there give me a
hand?
Have a look at the javadocs for all the Query subclasses, and the
source code to QueryParser (ignoring all the JavaCC gunk in the
way). Also, there are lots of examples of this in "Lucene in Action"
and the free code you can snag at lucenebook.com.
Also ... Another question I have is about the Analyzer's
involvement here.
When you use the QueryParser object, you pass in the particular
Analyzer (in
my case its the StandardAnalyzer) you would like to use when
analyzing the
text provided in the parse string. Why is it that when you are
building the
query programmatically, that you dont ever have to specify an Analyzer
object? I say this because I've been unable to find that
functionality/parameter/property anywhere. I'm probably missing
something
simple here, but it's just not making since to me.
Analyzing text is not something the Query subclasses should be doing,
but rather, as you're experiencing, it is delegated to the client of
the Query subclasses. You'll find it quite easy (only a few lines of
code). Check out the AnalysisDemo code (particularly the analyze
method) here:
<http://today.java.net/pub/a/today/2003/07/30/LuceneIntro.html>
That'll give you exactly what you want, and just insert adding
clauses to a BooleanQuery or something like that inside the loop of
terms (like QueryParser does).
Erik
