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annotate lucene/src/luan/modules/lucene/LuceneWriter.java @ 411:23b99a5039b5

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remove Luan.newTable()
author Franklin Schmidt <fschmidt@gmail.com>
date Wed, 29 Apr 2015 16:05:02 -0600
parents cd2924a1052c
children 23a93c118042
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1 package luan.modules.lucene;
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3 import java.io.IOException;
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4 import java.util.Map;
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5 import java.util.Set;
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6 import java.util.List;
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7 import java.util.ArrayList;
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8 import org.apache.lucene.index.IndexableField;
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9 import org.apache.lucene.index.Term;
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10 import luan.Luan;
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11 import luan.LuanState;
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12 import luan.LuanTable;
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13 import luan.LuanJavaFunction;
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14 import luan.LuanException;
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17 public final class LuceneWriter {
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18 private final LuceneIndex index;
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20 LuceneWriter(LuceneIndex index) {
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21 index.writeLock.lock();
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22 this.index = index;
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23 }
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25 // call in finally block
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26 void close() {
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27 index.writeLock.unlock();
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28 }
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30 void commit() throws IOException {
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31 index.writer.commit();
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32 }
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33
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34 void addDocument(LuanState luan,LuanTable doc) throws LuanException, IOException {
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35 index.writer.addDocument(index.toLucene(luan,doc));
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36 }
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38 void updateDocument(LuanState luan,Term term,LuanTable doc) throws LuanException, IOException {
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39 index.writer.updateDocument(term,index.toLucene(luan,doc));
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40 }
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42 public void delete_documents(LuanState luan,LuanTable tblTerms) throws LuanException, IOException {
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43 List<Term> list = new ArrayList<Term>();
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44 for( Map.Entry<Object,Object> entry : tblTerms ) {
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45 Object key = entry.getKey();
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46 Object value = entry.getValue();
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47 if( !(key instanceof String) )
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48 throw luan.exception("key must be a string but got "+key.getClass().getSimpleName());
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49 if( !(value instanceof String) )
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50 throw luan.exception("value must be a string but got "+value.getClass().getSimpleName());
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51 list.add( index.newTerm( (String)key, (String)value ) );
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52 }
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53 index.writer.deleteDocuments(list.toArray(new Term[list.size()]));
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54 }
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55
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56 String nextId(LuanState luan) throws LuanException, IOException {
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57 return index.nextId(luan);
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58 }
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59
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60 public void save_document(LuanState luan,LuanTable doc) throws LuanException, IOException {
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61 if( doc.get("type")==null )
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62 throw luan.exception("missing 'type' field");
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63 String id = (String)doc.get("id");
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64 if( id == null ) {
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65 id = nextId(luan);
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66 doc.put("id",id);
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67 addDocument(luan,doc);
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68 } else {
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69 updateDocument(luan,index.newTerm("id",id),doc);
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70 }
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71 }
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73 // luan
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75 private void add(LuanTable t,String method,Class<?>... parameterTypes) throws NoSuchMethodException {
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76 t.put( method, new LuanJavaFunction(LuceneWriter.class.getMethod(method,parameterTypes),this) );
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77 }
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79 LuanTable table() {
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23b99a5039b5 remove Luan.newTable()
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80 LuanTable tbl = new LuanTable();
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81 try {
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82 add( tbl, "save_document", LuanState.class, LuanTable.class );
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83 add( tbl, "delete_documents", LuanState.class, LuanTable.class );
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84 } catch(NoSuchMethodException e) {
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85 throw new RuntimeException(e);
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86 }
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87 return tbl;
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88 }
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89
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90 }