Examples of org.apache.lucene.index.IndexReader.deleteDocument()

Class org.apache.lucene.index.IndexReader

Examples of org.apache.lucene.index.IndexReader.deleteDocument()

org.apache.lucene.index.IndexReader.deleteDocument()
Deletes the document numbered docNum. Once a document is deleted it will not appear in TermDocs or TermPostitions enumerations. Attempts to read its field with the {@link #document}method will result in an error. The presence of this document may still be reflected in the {@link #docFreq} statistic, thoughthis will be corrected eventually as the index is further modified. @throws StaleReaderException if the index has changedsince this reader was opened @throws CorruptIndexException if the index is corrupt @throws LockObtainFailedException if another writerhas this index open (write.lock could not be obtained) @throws IOException if there is a low-level IO error

    IndexReader reader = IndexReader.open(new FsDirectory(fs, index, false, getConf()));
    try {
      while (values.hasNext()) {
        IntWritable value = (IntWritable)values.next();
        LOG.debug("-delete " + index + " doc=" + value);
        reader.deleteDocument(value.get());
      }
    } finally {
      reader.close();
    }
  }

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      int readerMax = reader.maxDoc();
      for (int doc = 0; doc < readerMax; doc++) {
        if (!reader.isDeleted(doc)) {
          Document document = reader.document(doc);
          if (document.get(CCIndexingFilter.FIELD)==null){ // no CC fields
            reader.deleteDocument(doc);                    // delete it
            deleteCount++;
          }
        }
      }
    }

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        }
      }
            //Now we have all lucene's ids of documents to be deleted and we can
            //proceed with the actual deletion.
            for (Integer i : documentsToDelete) {
                reader.deleteDocument(i);
            }
            
    } catch (IOException e) {
      logger.fatal("applyDeletes: IOException caught.", e);
            throw new RuntimeException(e);

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                                    if (! realFileModDate.equals(curFiModDate)) {
                                        logger.info("updateIndex() updating " + curFiName + " in index");


                                        numUpdates++;
                                        // remove old document
                                        ir.deleteDocument(i);
                                        ir.close();
                                        // open writer to add document once again
                                        ds.setStatus("Reindexing: " + curFiName);
                                        IndexWriter iw = new IndexWriter(di.getIndexPath(), new StandardAnalyzer(), false);
                                        // next line should remove too many files open errors

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                                    }
                                }
                                else {
                                    ds.setStatus("Deleting: " + curFiName);
                                    logger.info("updateIndex() remove " + curFiName + " from index");
                                    ir.deleteDocument(i);
                                    addDelNote(doc);
                                    numRemovals++;
                                }
                            }
                        }

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          readerForDelete = openIndexReaderForDelete();
          if (readerForDelete!=null)
          {
            for (int docid : delArray)
            {
              readerForDelete.deleteDocument(docid);
            }
          }
        }
        finally
        {

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    IndexReader reader = IndexReader.open(new FsDirectory(fs, index, false, getConf()));
    try {
      while (values.hasNext()) {
        IntWritable value = values.next();
        LOG.debug("-delete " + index + " doc=" + value);
        reader.deleteDocument(value.get());
      }
    } finally {
      reader.close();
    }
  }

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        writer.close();


        // delete 40 documents
        reader = IndexReader.open(dir);
        for (i = 0; i < 40; i++) {
            reader.deleteDocument(i);
        }
        reader.close();


        // test doc count before segments are merged/index is optimized
        writer = new IndexWriter(dir, new WhitespaceAnalyzer());

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    setUpDirs(dir, aux);


    IndexReader reader = IndexReader.open(aux);
    for (int i = 0; i < 20; i++) {
      reader.deleteDocument(i);
    }
    assertEquals(10, reader.numDocs());
    reader.close();


    IndexWriter writer = newWriter(dir, false);

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    assertEquals(3, writer.getSegmentCount());
    writer.close();


    IndexReader reader = IndexReader.open(aux);
    for (int i = 0; i < 27; i++) {
      reader.deleteDocument(i);
    }
    assertEquals(3, reader.numDocs());
    reader.close();


    reader = IndexReader.open(aux2);

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