[ http://issues.apache.org/jira/browse/LUCENE-584?page=comments#action_12437242 ] Paul Elschot commented on LUCENE-584: -------------------------------------
I wrote: > One could add an abstract Scorer.explain() to catch these, or > provide a default implementation for Scorer.explain(). by mistake. The good news is that the patch leaves the the existing abstract Scorer.explain() method unaffected. > Decouple Filter from BitSet > --------------------------- > > Key: LUCENE-584 > URL: http://issues.apache.org/jira/browse/LUCENE-584 > Project: Lucene - Java > Issue Type: Improvement > Components: Search > Affects Versions: 2.0.1 > Reporter: Peter Schäfer > Priority: Minor > Attachments: BitsMatcher.java, Filter-20060628.patch, > HitCollector-20060628.patch, IndexSearcher-20060628.patch, > MatchCollector.java, Matcher.java, Matcher20060830b.patch, > Scorer-20060628.patch, Searchable-20060628.patch, Searcher-20060628.patch, > Some Matchers.zip, SortedVIntList.java, TestSortedVIntList.java > > > {code} > package org.apache.lucene.search; > public abstract class Filter implements java.io.Serializable > { > public abstract AbstractBitSet bits(IndexReader reader) throws IOException; > } > public interface AbstractBitSet > { > public boolean get(int index); > } > {code} > It would be useful if the method =Filter.bits()= returned an abstract > interface, instead of =java.util.BitSet=. > Use case: there is a very large index, and, depending on the user's > privileges, only a small portion of the index is actually visible. > Sparsely populated =java.util.BitSet=s are not efficient and waste lots of > memory. It would be desirable to have an alternative BitSet implementation > with smaller memory footprint. > Though it _is_ possibly to derive classes from =java.util.BitSet=, it was > obviously not designed for that purpose. > That's why I propose to use an interface instead. The default implementation > could still delegate to =java.util.BitSet=. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://issues.apache.org/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]