Hi Kelvin, I done som similar only doing XOR for my chains. But now your improved filter is better than my own. I think I will replace my own by yours. Will it be part of Lucene in future?
Regards, Stephan > -----Original Message----- > From: Kelvin Tan [mailto:[EMAIL PROTECTED]] > Sent: Thursday, March 28, 2002 2:58 AM > To: Armbrust, Daniel C. > Cc: [EMAIL PROTECTED] > Subject: Re: Chainable Filter contribution > > > Dan, > > Totally my bad. I had since changed it but hadn't posted it > to the list coz > I didn't think anyone found it useful. > > Here's the correct version. I haven't really documented since > it's pretty > straightforward. Just holler if you need any help. > > Regards, > Kelvin > ----- Original Message ----- > From: "Armbrust, Daniel C." <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]> > Sent: Thursday, March 28, 2002 5:17 AM > Subject: Chainable Filter contribution > > > > I found this in the mailing list, and I do need something > like this, as I > > need to apply more than one filter at a time. I'm fairly > new to lucene, > > however, and my knowledge of BitSets is very limited. > > > > My question, if you would be so kind as to donate a minute > of time to me, > is > > how does this combine the filters? From my nieve look > through it, it > seems > > that all filter results would get discarded except for the > last filter > that > > was applied. > > > > > > Thanks, > > > > Dan > > > > > > > > import org.apache.lucene.index.IndexReader; > > import org.apache.lucene.search.Filter; > > > > import java.io.IOException; > > import java.util.BitSet; > > > > /** > > * <p> > > * A ChainableFilter allows multiple filters to be chained > > * such that the result is the intersection of all the > > * filters. > > * </p> > > * <p> > > * Order in which filters are called depends on > > * the position of the filter in the chain. It's probably > > * more efficient to place the most restrictive filters > > * /least computationally-intensive filters first. > > * </p> > > * > > * @author <a href="mailto:[EMAIL PROTECTED]";>Kelvin Tan</a> > > */ > > public class ChainableFilter extends Filter > > { > > /** The filter chain */ > > private Filter[] chain = null; > > > > /** > > * Creates a new ChainableFilter. > > * > > * @param chain The chain of filters. > > */ > > public ChainableFilter(Filter[] chain) > > { > > this.chain = chain; > > } > > > > public BitSet bits(IndexReader reader) throws IOException > > { > > BitSet result = null; > > for (int i = 0; i < chain.length; i++) > > { > > result = chain[i].bits(reader); > > } > > return result; > > } > > } > > > > > -- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>
