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annotate lucene/src/luan/modules/lucene/LuceneSearcher.java @ 230:4438cb2e04d0

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start lucene git-svn-id: https://luan-java.googlecode.com/svn/trunk@231 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Tue, 30 Sep 2014 20:03:56 +0000
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children 9ce18106f95a
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rev   line source
230
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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1 package luan.modules.lucene;
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2
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3 import java.io.IOException;
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4 import java.util.Iterator;
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5 import java.util.NoSuchElementException;
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6 import org.apache.lucene.index.IndexReader;
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7 import org.apache.lucene.document.Document;
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8 import org.apache.lucene.search.IndexSearcher;
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9 import org.apache.lucene.search.Query;
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10 import org.apache.lucene.search.TopDocs;
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11 import org.apache.lucene.search.TopFieldDocs;
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12 import org.apache.lucene.search.Sort;
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13 import org.apache.lucene.search.ScoreDoc;
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14 import luan.LuanTable;
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16
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17 public final class LuceneSearcher {
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18 private final IndexSearcher searcher;
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19
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20 LuceneSearcher(IndexReader reader) {
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21 this.searcher = new IndexSearcher(reader);
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22 }
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23
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24 // call in finally block
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25 public void close() {
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26 try {
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27 searcher.getIndexReader().decRef();
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28 } catch(IOException e) {
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29 throw new RuntimeException(e);
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30 }
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31 }
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32
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33 private Document rawDoc(int docID) {
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34 try {
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35 return searcher.doc(docID);
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36 } catch(IOException e) {
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37 throw new RuntimeException(e);
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38 }
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39 }
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41 public LuanTable doc(int docID) {
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42 return LuceneDocument.toTable(rawDoc(docID));
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43 }
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44
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45 public TopDocs search(Query query,int n) {
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46 try {
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47 return searcher.search(query,n);
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48 } catch(IOException e) {
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49 throw new RuntimeException(e);
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50 }
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51 }
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52
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53 public TopFieldDocs search(Query query,int n,Sort sort) {
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54 try {
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55 return searcher.search(query,n,sort);
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56 } catch(IOException e) {
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57 throw new RuntimeException(e);
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58 }
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59 }
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60
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61 public Iterable<LuanTable> docs(TopDocs td) {
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62 final ScoreDoc[] scoreDocs = td.scoreDocs;
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63 return new Iterable<LuanTable>() {
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64 public Iterator<LuanTable> iterator() {
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65 return new Iterator<LuanTable>() {
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66 private int i = 0;
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67
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68 public boolean hasNext() {
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69 return i < scoreDocs.length;
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70 }
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71
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72 public LuanTable next() {
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73 if( !hasNext() )
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74 throw new NoSuchElementException();
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75 return doc(scoreDocs[i++].doc);
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76 }
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77
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78 public void remove() {
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79 throw new UnsupportedOperationException();
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80 }
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81 };
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82 }
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83 };
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84 }
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85 }