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

Class org.apache.lucene.index.IndexReader

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

org.apache.lucene.index.IndexReader.deleteDocuments()
Deletes all documents that have a given term indexed. This is useful if one uses a document field to hold a unique ID string for the document. Then to delete such a document, one merely constructs a term with the appropriate field and the unique ID string as its text and passes it to this method. See {@link #deleteDocument(int)} for information about when this deletion will become effective. @return the number of documents deleted @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

        //--------------------------------------------------------------------


        // deleting the document just added, this will cause a different exception to take place
        Term term = new Term("id", "doc1");
        IndexReader readerB = IndexReader.open(indexStoreB);
        readerB.deleteDocuments(term);
        readerB.close();


        // optimizing the index with the writer
        writerB = new IndexWriter(indexStoreB, new StandardAnalyzer(), false);
        writerB.optimize();

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    if ( log.isTraceEnabled() )
      log.trace( "purgeAll Lucene index: " + entity );
    IndexReader reader = workspace.getIndexReader( provider, entity );
    try {
      Term term = new Term( DocumentBuilder.CLASS_FIELDNAME, entity.getName() );
      reader.deleteDocuments( term );
    }
    catch (Exception e) {
      throw new SearchException( "Unable to purge all from Lucene index: " + entity, e );
    }
  }

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   */
  public void removeFromIndex(URI id) {
    try {
      IndexReader reader = IndexReader.open(getIndexDir());
      Term term = new Term("URI", id.toString());
      reader.deleteDocuments(term);
      reader.close();
    } catch (Exception e) {
      logger.warning(e.toString());
    }

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                    if ( record != null )
                    {
                        Term term = new Term( FLD_PK, record.getPrimaryKey() );


                        indexReader.deleteDocuments( term );
                    }
                }
            }
            catch ( IOException e )
            {

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   * @throws IOException
   */
  public void remove(String documentID) throws IOException {
    Term term = new Term(FIELD_DOCUMENT_ID, documentID);
    IndexReader indexReader = IndexReader.open(indexDirectory);
    indexReader.deleteDocuments(term);
    indexReader.close();
  }
}

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        //--------------------------------------------------------------------


        // deleting the document just added, this will cause a different exception to take place
        Term term = new Term("id", "doc1");
        IndexReader readerB = IndexReader.open(indexStoreB);
        readerB.deleteDocuments(term);
        readerB.close();


        // optimizing the index with the writer
        writerB = new IndexWriter(indexStoreB, new StandardAnalyzer(), false, IndexWriter.MaxFieldLength.LIMITED);
        writerB.optimize();

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    // remove deleted documents
    IndexReader indexDeleter = index.indexReaderFactory();
    if (unflushedDeletions.size() > 0) {
      for (Term term : unflushedDeletions) {
        indexDeleter.deleteDocuments(term);
      }
      unflushedDeletions.clear();
    }

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    try {
      Directory directory = FSDirectory.getDirectory("index");
      IndexReader reader = IndexReader.open(directory);


      Term term = new Term("path", args[0]);
      int deleted = reader.deleteDocuments(term);


      System.out.println("deleted " + deleted +
        " documents containing " + term);


      // one can also delete documents by their internal id:

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    try {
      Directory directory = FSDirectory.open(new File("index"));
      IndexReader reader = IndexReader.open(directory, false); // we don't want read-only because we are about to delete


      Term term = new Term("path", args[0]);
      int deleted = reader.deleteDocuments(term);


      System.out.println("deleted " + deleted +
        " documents containing " + term);


      // one can also delete documents by their internal id:

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        //--------------------------------------------------------------------


        // deleting the document just added, this will cause a different exception to take place
        Term term = new Term("id", "doc1");
        IndexReader readerB = IndexReader.open(indexStoreB);
        readerB.deleteDocuments(term);
        readerB.close();


        // optimizing the index with the writer
        writerB = new IndexWriter(indexStoreB, new StandardAnalyzer(), false, IndexWriter.MaxFieldLength.LIMITED);
        writerB.optimize();

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