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." <Armbrust.Daniel@mayo.edu>
To: <kelvin@relevanz.com>
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:kelvin@relevanz.com">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;
> }
> }
>
>
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." <Armbrust.Daniel@mayo.edu>
To: <kelvin@relevanz.com>
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:kelvin@relevanz.com">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;
> }
> }
>
>
Attached Files:
-
ChainableFilter.java (2.34 KB)