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(air.hasDeletions(), tir.hasDeletions());
    assertEquals(air.maxDoc(), tir.maxDoc());
    assertEquals(air.numDocs(), tir.numDocs());
    assertEquals(air.numDeletedDocs(), tir.numDeletedDocs());


    air.deleteDocument(8);
    tir.deleteDocument(8);


    assertEquals(air.isCurrent(), tir.isCurrent());
    assertEquals(air.hasDeletions(), tir.hasDeletions());
    assertEquals(air.maxDoc(), tir.maxDoc());

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    /** fetch the compressed string field and compare it's content with the original one */
    String stringFldCompressedTest = docFromReader.get("stringCompressed");
    assertTrue(stringFldCompressedTest.equals(binaryValCompressed));


    /** delete the document from index */
    reader.deleteDocument(0);
    assertEquals(0, reader.numDocs());
    
    reader.close();
    dir.close();
  }

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        IndexReader reader = IndexReader.open(dir);
        Term aaa = new Term("content", "aaa");
        Term bbb = new Term("content", "bbb");
        Term ccc = new Term("content", "ccc");
        assertEquals(37, reader.docFreq(ccc));
        reader.deleteDocument(0);
        assertEquals(37, reader.docFreq(aaa));
        dir.tweakBufferSizes();
        reader.deleteDocument(4);
        assertEquals(reader.docFreq(bbb), 37);
        dir.tweakBufferSizes();

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        Term ccc = new Term("content", "ccc");
        assertEquals(37, reader.docFreq(ccc));
        reader.deleteDocument(0);
        assertEquals(37, reader.docFreq(aaa));
        dir.tweakBufferSizes();
        reader.deleteDocument(4);
        assertEquals(reader.docFreq(bbb), 37);
        dir.tweakBufferSizes();


        IndexSearcher searcher = new IndexSearcher(reader);
        ScoreDoc[] hits = searcher.search(new TermQuery(bbb), null, 1000).scoreDocs;

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      while ( termDocs.next() ) {
        int docIndex = termDocs.doc();
        if ( entityName.equals( reader.document( docIndex ).get( DocumentBuilder.CLASS_FIELDNAME ) ) ) {
          //remove only the one of the right class
          //loop all to remove all the matches (defensive code)
          reader.deleteDocument( docIndex );
        }
      }
    }
    catch (Exception e) {
      throw new SearchException( "Unable to remove from Lucene index: " + entity + "#" + id, e );

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    testEquals(aprioriIndex,  testIndex);


       // delete a few documents
    IndexReader ir = IndexReader.open(aprioriIndex, false);
    ir.deleteDocument(3);
    ir.deleteDocument(8);
    ir.close();


    ir = testIndex.indexReaderFactory();
    ir.deleteDocument(3);

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    testEquals(aprioriIndex,  testIndex);


       // delete a few documents
    IndexReader ir = IndexReader.open(aprioriIndex, false);
    ir.deleteDocument(3);
    ir.deleteDocument(8);
    ir.close();


    ir = testIndex.indexReaderFactory();
    ir.deleteDocument(3);
    ir.deleteDocument(8);

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    ir.deleteDocument(3);
    ir.deleteDocument(8);
    ir.close();


    ir = testIndex.indexReaderFactory();
    ir.deleteDocument(3);
    ir.deleteDocument(8);
    ir.close();


    // make sure they still equal
    testEquals(aprioriIndex,  testIndex);

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    ir.deleteDocument(8);
    ir.close();


    ir = testIndex.indexReaderFactory();
    ir.deleteDocument(3);
    ir.deleteDocument(8);
    ir.close();


    // make sure they still equal
    testEquals(aprioriIndex,  testIndex);
  }

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    addDocument(iw, "Hello, earth!");
    addDocument(iw, "All work and no play makes wendy a dull girl");
    iw.close();


    IndexReader multiSegReader = IndexReader.open(dir, false);
    multiSegReader.deleteDocument(2);


    try {
      new InstantiatedIndex(multiSegReader);
    } catch (Exception e) {
      e.printStackTrace(System.out);

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