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

      
      TestDataDigester testDigester=new TestDataDigester(_fconf,data);
      BoboIndexer indexer=new BoboIndexer(testDigester,idxDir);
      indexer.index();
      IndexReader r = IndexReader.open(idxDir,false);
      r.deleteDocument(r.maxDoc() - 1);
      //r.flush();
      r.close();
    } catch (UnsupportedEncodingException e) {
      e.printStackTrace();
    } catch (IOException e) {

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    /** fetch the string field and compare it's content with the original one */
    String stringFldStoredTest = docFromReader.get("stringStored");
    assertTrue(stringFldStoredTest.equals(binaryValStored));
    
    /** 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, false);
        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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    addDocument(iw, "Hello, earth!");
    addDocument(iw, "All work and no play makes wendy a dull girl");
    iw.close();


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


    InstantiatedIndex ii;
    try {
     ii = new InstantiatedIndex(unoptimizedReader);
    } catch (Exception e) {

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


    air.deleteDocument(3);
    tir.deleteDocument(3);


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

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    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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    testEquals(aprioriIndex,  testIndex);


       // delete a few documents
    IndexReader ir = IndexReader.open(aprioriIndex);
    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);
    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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