Examples of org.terrier.structures.indexing.singlepass.RunsMerger

Package org.terrier.structures.indexing.singlepass

Examples of org.terrier.structures.indexing.singlepass.RunsMerger

org.terrier.structures.indexing.singlepass.RunsMerger
Merges a set of N runs using a priority queue. Each element of the queue is a {@link org.terrier.structures.indexing.singlepass.RunIterator}each one pointing at a different run in disk. Each run is sorted, so we only need to compare the heads of the element in the queue in each merging step. As the runs are being merged, they are written (to disk) using a {@link org.terrier.compression.BitOut}. @author Roi Blanco and Craig Macdonald @since 2.0

  /**
   * Hook method that creates a FieldRunMerger instance
   * @throws IOException if an I/O error occurs.
   */
  protected void createFieldRunMerger(String[][] files) throws Exception{
    merger = new RunsMerger(new FileRunIteratorFactory(files, FieldPostingInRun.class, super.numFields));
  }

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  /**
   * Hook method that creates a RunsMerger instance
   * @throws IOException if an I/O error occurs.
   */
  protected void createRunMerger(String[][] files) throws Exception{
    merger = new RunsMerger(new FileRunIteratorFactory(files, 
        useFieldInformation ? FieldPostingInRun.class : SimplePostingInRun.class, 0));
  }

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  /** {@inheritDoc} */
  @Override
  protected void createRunMerger(String[][] files) throws Exception{
    //modified to use getPostingInRunClass()
    merger = new RunsMerger(new FileRunIteratorFactory(files, getPostingInRunClass(), 0));
  }

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    basicInvertedIndexPostingIteratorClass = BlockIterablePosting.class.getName();
    fieldInvertedIndexPostingIteratorClass = BlockFieldIterablePosting.class.getName();
  }
  
  protected void createFieldRunMerger(String[][] files) throws IOException{
    merger = new RunsMerger(new FileRunIteratorFactory(files, BlockFieldPostingInRun.class, super.numFields));
  }

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  protected void createFieldRunMerger(String[][] files) throws IOException{
    merger = new RunsMerger(new FileRunIteratorFactory(files, BlockFieldPostingInRun.class, super.numFields));
  }
  
  protected void createRunMerger(String[][] files) throws Exception{
    merger = new RunsMerger(new FileRunIteratorFactory(files, BlockPostingInRun.class, 0));
  }

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Related Classes of org.terrier.structures.indexing.singlepass.RunsMerger

org.terrier.compression.BitOutputStream

org.terrier.indexing.BasicSinglePassIndexer

org.terrier.indexing.BlockSinglePassIndexer

org.terrier.indexing.ExtensibleSinglePassIndexer

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