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

      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 HibernateException( "Unable to remove from Lucene index: " + entity + "#" + id, 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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        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 = newSearcher(reader);
        ScoreDoc[] hits = searcher.search(new TermQuery(bbb), null, 1000).scoreDocs;

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

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

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    bq.add(new TermQuery(new Term("key", "three")), BooleanClause.Occur.MUST);
    hits = is.search(bq, null, 1000).scoreDocs;
    assertEquals(1, hits.length);


    // delete a document:
    ir.deleteDocument(0);
    hits = is.search(new MatchAllDocsQuery(), null, 1000).scoreDocs;
    assertEquals(2, hits.length);
    
    // test parsable toString()
    QueryParser qp = new QueryParser(TEST_VERSION_CURRENT, "key", analyzer);

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