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

    assertEquals(3, reader.numDocs());
    reader.close();


    reader = IndexReader.open(aux2);
    for (int i = 0; i < 8; i++) {
      reader.deleteDocument(i);
    }
    assertEquals(22, reader.numDocs());
    reader.close();


    writer = newWriter(dir, false);

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    IndexReader reader = IndexReader.open(new FsDirectory(fs, index, false, getConf()), false);
    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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      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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    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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    assertEquals(3, reader.numDocs());
    reader.close();


    reader = IndexReader.open(aux2);
    for (int i = 0; i < 8; i++) {
      reader.deleteDocument(i);
    }
    assertEquals(22, reader.numDocs());
    reader.close();


    writer = newWriter(dir, false);

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            while (termDocs.next()) {
                /*
                 * if this is a pure delete just delete it an continue
                 */
                if (docToKeep == 0) {
                    reader.deleteDocument(termDocs.doc());
                    continue;
                }


                int prev = this.documentNumber[pos];
                this.documentNumber[pos] = termDocs.doc();

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                }


                int prev = this.documentNumber[pos];
                this.documentNumber[pos] = termDocs.doc();
                if (prev != -1) {
                    reader.deleteDocument(prev);
                }


                if (++pos >= docToKeep)
                    pos = 0;

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    /** fetch the compressed string field and compare it's content with the original one */
    String stringFldCompressedTest = new String(docFromReader.get("stringCompressed"));
    assertTrue(stringFldCompressedTest.equals(binaryValCompressed));
    
    /** delete the document from index */
    reader.deleteDocument(0);
    assertEquals(0, reader.numDocs());
    
    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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