Mercurial Hosting > luan
view lucene/src/luan/modules/lucene/LuceneSearcher.java @ 544:c5a93767cc5c
lucene overhaul, untested
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Fri, 12 Jun 2015 19:11:44 -0600 |
parents | 5d4a78c93383 |
children |
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package luan.modules.lucene; import java.io.IOException; import java.util.NoSuchElementException; import java.util.Map; import java.util.List; import org.apache.lucene.index.IndexReader; import org.apache.lucene.index.Term; import org.apache.lucene.search.IndexSearcher; import org.apache.lucene.search.Query; import org.apache.lucene.search.TopDocs; import org.apache.lucene.search.TopFieldDocs; import org.apache.lucene.search.Sort; import org.apache.lucene.search.SortField; import org.apache.lucene.search.ScoreDoc; import org.apache.lucene.search.TermQuery; import org.apache.lucene.search.BooleanQuery; import org.apache.lucene.search.BooleanClause; import org.apache.lucene.search.Collector; import org.apache.lucene.search.TotalHitCountCollector; import org.apache.lucene.search.Scorer; import org.apache.lucene.search.MatchAllDocsQuery; import org.apache.lucene.index.AtomicReaderContext; import sane.lucene.queryparser.ParseException; import luan.Luan; import luan.LuanState; import luan.LuanTable; import luan.LuanFunction; import luan.LuanJavaFunction; import luan.LuanException; import luan.LuanRuntimeException; import luan.LuanMethod; import luan.modules.Utils; public final class LuceneSearcher { private final LuceneIndex index; final IndexSearcher searcher; LuceneSearcher(LuceneIndex index,IndexReader reader) { this.index = index; this.searcher = new IndexSearcher(reader); } // call in finally block void close() throws IOException { searcher.getIndexReader().decRef(); } private LuanTable doc(LuanState luan,int docID) throws LuanException, IOException { return LuceneDocument.toTable(luan,searcher.doc(docID)); } /* TopDocs search(Query query,int n) throws IOException { return searcher.search(query,n); } TopFieldDocs search(Query query,int n,Sort sort) throws IOException { return searcher.search(query,n,sort); } */ // luan private static final LuanFunction nothingFn = new LuanFunction() { @Override public Object call(LuanState luan,Object[] args) { return LuanFunction.NOTHING; } }; private static abstract class MyCollector extends Collector { int docBase; @Override public void setScorer(Scorer scorer) {} @Override public void setNextReader(AtomicReaderContext context) { this.docBase = context.docBase; } @Override public boolean acceptsDocsOutOfOrder() { return true; } } @LuanMethod public Object[] search( final LuanState luan, String queryStr, Object nObj, String sortStr ) throws LuanException, IOException, ParseException { Utils.checkNotNull(luan,queryStr); Query query = index.parseQuery(queryStr); if( nObj instanceof LuanFunction ) { final LuanFunction fn = (LuanFunction)nObj; Collector col = new MyCollector() { @Override public void collect(int doc) { try { try { LuanTable docTbl = doc(luan,docBase+doc); luan.call(fn,new Object[]{docTbl}); } catch(IOException e) { throw luan.exception(e); } } catch(LuanException e) { throw new LuanRuntimeException(e); } } }; try { searcher.search(query,col); } catch(LuanRuntimeException e) { throw (LuanException)e.getCause(); } return LuanFunction.NOTHING; } Integer nI = Luan.asInteger(nObj); if( nI == null ) throw luan.exception("bad argument #2 (integer or function expected, got "+Luan.type(nObj)+")"); int n = nI; if( n==0 ) { TotalHitCountCollector thcc = new TotalHitCountCollector(); searcher.search(query,thcc); return new Object[]{ nothingFn, 0, thcc.getTotalHits() }; } Sort sort = sortStr==null ? null : index.parseSort(sortStr); TopDocs td = sort==null ? searcher.search(query,n) : searcher.search(query,n,sort); final ScoreDoc[] scoreDocs = td.scoreDocs; LuanFunction results = new LuanFunction() { int i = 0; @Override public Object call(LuanState luan,Object[] args) throws LuanException { if( i >= scoreDocs.length ) return LuanFunction.NOTHING; try { LuanTable doc = doc(luan,scoreDocs[i++].doc); return doc; } catch(IOException e) { throw luan.exception(e); } } }; return new Object[]{ results, scoreDocs.length, td.totalHits }; } private void add(LuanTable t,String method,Class<?>... parameterTypes) throws NoSuchMethodException { t.rawPut( method, new LuanJavaFunction(LuceneSearcher.class.getMethod(method,parameterTypes),this) ); } LuanTable table() { LuanTable tbl = new LuanTable(); try { add( tbl, "search", LuanState.class, String.class, Object.class, String.class ); } catch(NoSuchMethodException e) { throw new RuntimeException(e); } return tbl; } }