Examples of org.apache.lucene.facet.encoding.NOnesIntEncoder

org.apache.lucene.facet.encoding.NOnesIntEncoder

A variation of {@link FourFlagsIntEncoder} which translates the data asfollows:

Values ≥ 2 are trnalsated to value+1 (2 ⇒ 3, 3 ⇒ 4 and so forth).
Any N occurrences of 1 are encoded as a single 2.
Otherwise, each 1 is encoded as 1.

Encoding examples:

N = 4: the data 1,1,1,1,1 is translated to: 2, 1
N = 3: the data 1,2,3,4,1,1,1,1,5 is translated to 1,3,4,5,2,1,6

NOTE: this encoder does not support values ≤ 0 and {@link Integer#MAX_VALUE}. 0 is not supported because it's not supported by {@link FourFlagsIntEncoder} and {@link Integer#MAX_VALUE} because thisencoder translates N to N+1, which will cause an overflow and {@link Integer#MAX_VALUE} will become a negative number, which is notsupported as well.
This does not mean you cannot encode {@link Integer#MAX_VALUE}. If it is not the first value to encode, and you wrap this encoder with {@link DGapIntEncoder}, then the value that will be sent to this encoder will be MAX_VAL - prev. @lucene.experimental

    encoderTest(new SortingIntEncoder(new UniqueValuesIntEncoder(new VInt8IntEncoder())), facetIDs, loopFactor);
    encoderTest(new SortingIntEncoder(new UniqueValuesIntEncoder(new DGapIntEncoder(new VInt8IntEncoder()))), facetIDs, loopFactor);
    encoderTest(new SortingIntEncoder(new UniqueValuesIntEncoder(new DGapVInt8IntEncoder())), facetIDs, loopFactor);
    encoderTest(new SortingIntEncoder(new UniqueValuesIntEncoder(new DGapIntEncoder(new EightFlagsIntEncoder()))), facetIDs, loopFactor);
    encoderTest(new SortingIntEncoder(new UniqueValuesIntEncoder(new DGapIntEncoder(new FourFlagsIntEncoder()))), facetIDs, loopFactor);
    encoderTest(new SortingIntEncoder(new UniqueValuesIntEncoder(new DGapIntEncoder(new NOnesIntEncoder(3)))), facetIDs, loopFactor);
    encoderTest(new SortingIntEncoder(new UniqueValuesIntEncoder(new DGapIntEncoder(new NOnesIntEncoder(4)))), facetIDs, loopFactor);


    System.out.println();
  }

    encoderTest(new SortingIntEncoder(new UniqueValuesIntEncoder(new DGapIntEncoder(new FourFlagsIntEncoder()))), data, uniqueSortedData);
  }


  @Test
  public void testSortingUniqueDGapNOnes4() throws Exception {
    encoderTest(new SortingIntEncoder(new UniqueValuesIntEncoder(new DGapIntEncoder(new NOnesIntEncoder(4)))), data, uniqueSortedData);
  }

    encoderTest(new SortingIntEncoder(new UniqueValuesIntEncoder(new DGapIntEncoder(new NOnesIntEncoder(4)))), data, uniqueSortedData);
  }
  
  @Test
  public void testSortingUniqueDGapNOnes3() throws Exception {
    encoderTest(new SortingIntEncoder(new UniqueValuesIntEncoder(new DGapIntEncoder(new NOnesIntEncoder(3)))), data, uniqueSortedData);
  }

Examples of org.apache.lucene.facet.encoding.NOnesIntEncoder

Related Classes of org.apache.lucene.facet.encoding.NOnesIntEncoder